2,874 research outputs found
Higher-order time integration using spectral deferred correction method (SDC) in a cell by cell discretization of cardiac excitation
No full textThis C++ code implements a cell-by-cell model of cardiac excitation using a piecewise-continuous finite element discretization and spectral deferred correction time stepping. The code is based on the Kaskade 7 finite element toolbox and forms a prototype for the µCarp code to be implemented in the Microcard project
Convergence Properties of Newton’s Method for Globally Optimal Free Flight Trajectory Optimization (Short Paper)
No full textThe algorithmic efficiency of Newton-based methods for Free Flight Trajectory Optimization is heavily influenced by the size of the domain of convergence. We provide numerical evidence that the convergence radius is much larger in practice than what the theoretical worst case bounds suggest. The algorithm can be further improved by a convergence-enhancing domain decomposition
A Discrete-Continuous Algorithm for Globally Optimal Free Flight Trajectory Optimization
No full textWe present an efficient algorithm that finds a globally optimal solution to the 2D Free Flight Trajectory Optimization Problem (aka Zermelo Navigation Problem) up to arbitrary precision in finite time. The algorithm combines a discrete and a continuous optimization phase. In the discrete phase, a set of candidate paths that densely covers the trajectory space is created on a directed auxiliary graph. Then Yen’s algorithm provides a promising set of discrete candidate paths which subsequently undergo a locally convergent refinement stage. Provided that the auxiliary graph is sufficiently dense, the method finds a path that lies within the convex domain around the global minimizer. From this starting point, the second stage will converge rapidly to the optimum. The density of the auxiliary graph depends solely on the wind field, and not on the accuracy of the solution, such that the method inherits the superior asymptotic convergence properties of the optimal control stage
3dgeo-heidelberg/syssifoss: Version 1.0.0
No full textCollection of Scripts used to produce our dataset of terrestrial, UAV-borne and airborne laser scanning point clouds of single trees and tree measurements
References:
Weiser, Hannah; Schäfer, Jannika; Winiwarter, Lukas; Krašovec, Nina; Seitz, Christian; Schimka, Marian; Anders, Katharina; Baete, Daria; Braz, Andressa Soarez; Brand, Johannes; Debroize, Denis; Kuss, Paula; Martin, Lioba Lucia; Mayer, Angelo; Schrempp, Torben; Schwarz, Lisa-Maricia; Ulrich, Veit; Fassnacht, Fabian E.; Höfle, Bernhard (2022): Terrestrial, UAV-borne, and airborne laser scanning point clouds of central European forest plots, Germany, with extracted individual trees and manual forest inventory measurements. PANGAEA, https://doi.org/10.1594/PANGAEA.942856
Weiser, H., Schäfer, J., Winiwarter, L., Krašovec, N., Fassnacht, F. E., and Höfle, B.: Individual tree point clouds and tree measurements from multi-platform laser scanning in German forests, Earth Syst. Sci. Data Discuss. [preprint], https://doi.org/10.5194/essd-2022-39, accepted, 2022
Walter Ameling (Hrsg.), Die Inschriften von Prusias ad Hypium ; Woligang Blümel (Hrsg.), Die Inschriften von lasos. Teil I : Nr. 1-218. - Teil II : Nr. 219-640, mit einem Anhang von Wolfram Weiser : Zur Münzprägung von lasos und Bargylia ; Thomas Corsten (Hrsg.), Die Inschriften von Kios
No full textMartin Alain. Walter Ameling (Hrsg.), Die Inschriften von Prusias ad Hypium ; Woligang Blümel (Hrsg.), Die Inschriften von lasos. Teil I : Nr. 1-218. - Teil II : Nr. 219-640, mit einem Anhang von Wolfram Weiser : Zur Münzprägung von lasos und Bargylia ; Thomas Corsten (Hrsg.), Die Inschriften von Kios. In: L'antiquité classique, Tome 56, 1987. pp. 427-428
Walter Ameling (Hrsg.), Die Inschriften von Prusias ad Hypium ; Woligang Blümel (Hrsg.), Die Inschriften von lasos. Teil I : Nr. 1-218. - Teil II : Nr. 219-640, mit einem Anhang von Wolfram Weiser : Zur Münzprägung von lasos und Bargylia ; Thomas Corsten (Hrsg.), Die Inschriften von Kios
No full textMartin Alain. Walter Ameling (Hrsg.), Die Inschriften von Prusias ad Hypium ; Woligang Blümel (Hrsg.), Die Inschriften von lasos. Teil I : Nr. 1-218. - Teil II : Nr. 219-640, mit einem Anhang von Wolfram Weiser : Zur Münzprägung von lasos und Bargylia ; Thomas Corsten (Hrsg.), Die Inschriften von Kios. In: L'antiquité classique, Tome 56, 1987. pp. 427-428
Linear convergence of an interior point method for linear control constrained optimal control problems
No full textThe paper provides a detailed analysis of a short step interior point algorithm applied to linear control constrained optimal control problems. Using an affine invariant local norm and an inexact Newton corrector, the well-known convergence results from finite dimensional linear programming can be extended to the infinite dimensional setting of optimal control. The present work complements a recent paper of Weiser and Deuflhard, where convergence rates have not been derived. The choice of free parameters, i.e. the corrector accuracy and the number of corrector steps, is discussed
Proceedings of Cardiff Institute for Tissue Engineering & Repair Annual Scientific Meeting (CITER ASM 2021)
No full textCITER ASM 2021
The abstracts appearing in this book comprise the proceedings of the CITER ASM 2021, held between the 13th and 14th of September 2021. The posters presented reflect the authors’ opinions and are published as presented and without change (formatting and minor editing expected). Their inclusion in this publication does not necessarily constitute endorsement by the editors, CITER, or the Cardiff University.
Please use the following format to cite material from these Proceedings:
Author, AB, Author, XY, and Author, DE (2021), Title of paper, Proc. Cardiff Institute for Tissue Engineering & Repair Annual Scientific Meeting (CITER ASM 2021), M Al-Amri, R Weiser (Eds), pp. a–b, Cardiff, UK, 13-14 Sept. 2021, ISSN 2634-100X
Proceedings reference number: ISSN 2634-100X
Published by Cardiff University
For information, contact: CITER, Cardiff University, Redwood Building, King Edward VII Avenue, CF10 3NB.
Email: [email protected]
Supplemental Material - Cervical Disc Arthroplasties Fail to Maintain Physiological Kinematics Under Lateral Eccentric Loads
No full textSupplemental Material for Cervical Disc Arthroplasties Fail to Maintain Physiological Kinematics Under Lateral Eccentric Loads by Paul Jonathan Roch, Constantin Hemprich, Friederike Klockner, Marc-Pascal Meier, Katharina Jäckle, Wolfgang Lehmann, Martin Michael Wachowski and Lukas Weiser in Global Spine Journal</p
Podążając śladami dzieciństwa – „kuglarstwa” pamięci w filmie Weiser (2000) Wojciecha Marczewskiego
No full textThe subject of the article is Wojciech Marczewski’s film Weiser (2000), based on Paweł Huelle’s novel, which explores the problems of memory and oblivion. The author indicates the differences between the cinematic adaptation and the literary prototype that are connected with the strategy of constructing the main characters and modifications of the time and place of the action. Afterwards, Jalocha describes the relationship between image, memory and imagination. Analyzing the formal construction of Weiser, she names the means of cinematic expression that allow to imitate the work of memory. She characterizes the contrast between the lanes of the past and present established in the film, the structure of flashbacks, the way of introducing them into the narration and, based on the scope of subjectivity, she divides retrospections into two sub-categories. Jałocha refers to Paul Ricoeur’s phenomenology of memory, that is the notion of trace and the aporia of presentabsent. When interpreting the film, she takes into consideration the characters’ motivations, their attitudes towards the past, the influence of ‘what has been’ on the present, the nature of the process of reconstructing the truth about the bygone events. She also identifies the motives used in the film that are linked with memory, such as photography and archives. Additionally, the author shows different functions assigned to the character of Weiser: he may be seen as a figure of the Other, the metaphor of childhood and the past seen in terms of an enigma. Marchewski’s films, as Jalocha argues, both on the level of plot and formal organization, thematize the memory and its limitations as well as the inaccessibility of the past founded on the difference between ‘here/now’ and ‘there/then’.Tematem artykułu jest podejmujący problematykę pamięci i zapomnienia Weiser (2000) Wojciecha Marczewskiego, film oparty na powieści Pawła Huellego. Autorka porównuje różnice pomiędzy literackim pierwowzorem a adaptacją filmową, związane między innymi ze sposobem konstruowania postaci i dokonaną przez reżysera zmianą czasu oraz miejsca akcji. Ponadto analizuje konstrukcję formalną Weisera i zastosowane w dziele środki wyrazu filmowego, przy pomocy których naśladowana jest praca pamięci. Charakteryzuje budowany w filmie kontrast pomiędzy płaszczyznami teraźniejszości oraz przeszłości, opisuje strukturę retrospekcji, sposób ich wprowadzania w obręb narracji i, biorąc pod uwagę między innymi zakres subiektywizacji, dzieli je na dwie sub-kategorie. Dokonując interpretacji filmu, odwołuje się do sformułowanej przez Paula Ricoeura fenomenologii pamięci: pojęcia śladu-wspomnienia oraz aporii uobecniania nieobecnego
- …
