4,716 research outputs found
Time‐continuous and time‐discontinuous space‐time finite elements for advection‐diffusion problems
No full textWe 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
“Poland represented existential experiences of resistance, political experiences and intellectual impact”. Marek Zybura in conversation with Wolfgang Templin, the author of the German biography of Józef Piłsudski
No full textWolfgang Templin (born in 1948) was active in the democratic resistance in the former GDR. He co‑founded the party Bündnis 90 in reunified Germany and was writer and author of history books. In the conversation with Marek Zybura (born in 1957) —the Chair of History of Literature and Culture of Germany in the Willy Brandt Centre of German and European Studies at the University of Wroclaw—Templin discusses the origins of his Piłsudski biography (2022), which is being published in the Polish translation by Bellona in Warsaw
Simplex space-time meshes in engineering applications with moving domains
No full textThis paper highlights how unstructured space-time meshes can be used in production engineering applications with moving domains. Unstructured space-time elements can connect different spatial meshes at the bottom and top level of the space-time domain and deal with complicated domain movements/rotations that the standard arbitrary Lagrangian-Eulerian techniques can not resolve without remeshing. We use a space-time finite element discretization, by means of 4D simplex space-time elements, referred to as pentatopes by Behr [2008], which leads to entirely unstructured grids with varying levels of refinement both in space and in time. Furthermore, we use stabilization techniques, and the stabilization parameter is defined based on the contravariant metric tensor, as shown in the work of Pauli and Behr [2017]. Its definition was extended in 4D by von Danwitz et al. [2019], allowing us to deal with complex anisotropic simplex meshes in the space-time domain
Time-Continuous and Time-Discontinuous Space-Time Finite Elements for Advection-Diffusion Problems
Full text linkWe 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 L2 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\u27 spatial, temporal, and spacetime 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 towards 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.29 pages, 22 figure
Opening sentences in Marek Krajewski’s novels
No full textOpening sentences raise a lot of interest of both linguists and common Polish speakers. It is evident from numerous websites in which Internet users share their observations on the best opening sentences of books (most often novels), as well as theoretical papers and writing guides. The analysis of opening sentences of ten novels by Marek Krajewski (co-author of two of them being Mariusz Czubaj) is to provide an answer to the question to what extent the utterance opening of the texts of the Wroc³aw-based prose writer fulfill the requirements to be met by such type of constructions. It turns out that most crucial are syntactic and semantic features rather than lexical ones. The clash between theoretical assumptions and the M. Krajewski’s writing practice shows that opening sentences of his novels not always fall into classical determinants of incipient formulas. It also illustrates the thesis that a skillful writer does not need to cling to theoretical assumptions to create good opening sentences and novels translated into nearly twenty languages
Reality as a feeling – a feeling as reality. On the film by Joseph Cedar, Footnote
Full text linkHendrykowski Marek, Reality as a feeling – a feeling as reality. On the film by Joseph Cedar, Footnote. “Images” vol. XXV, no. 34. Poznań 2019. Adam Mickiewicz University Press. Pp. 57–xx. ISSN 1731-450X. DOI 10.14746/i.2019.34.04.
This analytical study by Marek Hendrykowski is an attempt to re-read one of the most valuable contemporary films of Israeli production, Footnote, written and directed by Joseph Cedar. The author paid particular attention to the specific way of conducting a seemingly dependent narration, skillfully combining the image of external reality with the sphere of thought and the feelings of the main character.Hendrykowski Marek, Reality as a feeling – a feeling as reality. On the film by Joseph Cedar, Footnote. “Images” vol. XXV, no. 34. Poznań 2019. Adam Mickiewicz University Press. Pp. 57–xx. ISSN 1731-450X. DOI 10.14746/i.2019.34.04.
This analytical study by Marek Hendrykowski is an attempt to re-read one of the most valuable contemporary films of Israeli production, Footnote, written and directed by Joseph Cedar. The author paid particular attention to the specific way of conducting a seemingly dependent narration, skillfully combining the image of external reality with the sphere of thought and the feelings of the main character
The trend of nominal and real exchange rate of koruna
No full textBachelor work, topic: The trend of nominal and real exchange rate of koruna Author: Marek Kolman Supervisor: Doc. Ing. Josef Taušer, Ph.D. Size: 58 page
O Słowackim ponowocześnie [rec. Marek Troszyński: Słowacki. Poza kanonem. Gdańsk: Wydawnictwo Słowo/ Obraz Terytoria, 2014, ss. 411, nlb. 5, il. 65.]
No full textThe title of Marek Troszyński’s book Słowacki. Poza kanonem is excellent from the perspective of marketing, but at the same time, it succeeds in conveying thecontent of the 11 chapters of different length, supplemented with 8 interesting appendices and 65 aptly selected and described illustrations. In a way, it has a character of sylwa; its previous versions (published in refereed magazines and collective monographs) became considerably re‑edited in order to achieve the result in the form of monography. I accept the opening form of this dissertation, which is proposed by the author, as well as his affirmative attitude to the poet’s quasi‑literary achievements, which makes the author “a friendly witness” of Słowacki’s biography and writing. The work is undoubtedly original, own, exceptional and quite unique. I do not expect that in the foreseeable future we will encounter any gifted follower of the method, inquisitiveness, a highly interesting narration, and at the same time a lucky discoverer of so many philological findings, offering such a great number of the conjectures of the poems, not necessarily canonical ones, however, coming after the “canonical”, because critical, edition of Juliusz Kleiner. The title of Marek Troszyński’s book Słowacki. Poza kanonem is excellent from the perspective of marketing, but at the same time, it succeeds in conveying thecontent of the 11 chapters of different length, supplemented with 8 interesting appendices and 65 aptly selected and described illustrations. In a way, it has a character of sylwa; its previous versions (published in refereed magazines and collective monographs) became considerably re‑edited in order to achieve the result in the form of monography. I accept the opening form of this dissertation, which is proposed by the author, as well as his affirmative attitude to the poet’s quasi‑literary achievements, which makes the author “a friendly witness” of Słowacki’s biography and writing. The work is undoubtedly original, own, exceptional and quite unique. I do not expect that in the foreseeable future we will encounter any gifted follower of the method, inquisitiveness, a highly interesting narration, and at the same time a lucky discoverer of so many philological findings, offering such a great number of the conjectures of the poems, not necessarily canonical ones, however, coming after the “canonical”, because critical, edition of Juliusz Kleiner. 
Monolithic Simulation of Convection-Coupled Phase-Change: Verification and Reproducibility
No full textAdam Mickiewicz − The Presumed Reader of Słowacki’s Drama “Ksiądz Marek” [“Father Marek”]
No full textArtykuł koncentruje się na problematyce koncepcji estetycznych i ich twórczych realizacji w latach czterdziestych XIX wieku, po tzw. przełomie towianistycznym, w dramatach autora Balladyny. Z tej perspektywy intrygująca wydaje się figura Mickiewicza − domniemanego odbiorcy późnej twórczości Słowackiego, w tym dramatu pt. Ksiądz Marek, uznawanego za najbardziej towianistyczne dzieło poety. Wychodząc od próby odtworzenia domniemanej lektury tekstu Słowackiego przez Mickiewicza, ponawiam w tekście pytanie o milczenie profesora w Collège de France na temat twórczości Słowackiego − zwłaszcza tej późnej, z lat czterdziestych, która powinna być bliska Mickiewiczowi. Zadaję je w kontekście intrygującego faktu przemilczenia przez autora Dziadów własnej twórczości w prelekcjach paryskich.The article focuses on the issues of aesthetic concepts and their creative realisations in the forties, after the so-called Towian breakthrough, in the dramas of the author of Balladyna [Balladyna]. From this perspective, the figure of Mickiewicz seems to be intriguing − he appears as a supposed recipient of Słowacki’s late work, including the drama “Ksiądz Marek” [“Father Marek”], which is considered to be the work most influenced by Towianist ideas. Starting from attempts to reconstruct the alleged reading of Słowacki’s text by Mickiewicz, I repeat the question about the professor’s silence at the Collège de France about the work of Słowacki − especially that written in the late forties, which should be well-known to Mickiewicz. I ask this question in the context of an intriguing fact of Mickiewicz’s silence about his own work during his Paris lectures
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