Publikationen
21.
Lehmann, Robert, Petuchow, Arthur, Moullion, Matthias, Künzler, Moritz, Windel, Christian, Gauterin, Frank
Fluid Choice Based on Thermal Model and Performance Testing for Direct Cooled Electric Drive Artikel
In: Energies, Bd. 13, Nr. 22, 2020, ISSN: 1996-1073.
@article{LehmannEtAl_2020,
title = {Fluid Choice Based on Thermal Model and Performance Testing for Direct Cooled Electric Drive},
author = {Robert Lehmann and Arthur Petuchow and Matthias Moullion and Moritz Künzler and Christian Windel and Frank Gauterin},
url = {https://www.mdpi.com/1996-1073/13/22/5867},
doi = {10.3390/en13225867},
issn = {1996-1073},
year = {2020},
date = {2020-01-01},
journal = {Energies},
volume = {13},
number = {22},
abstract = {In this publication, the cooling fluid for direct oil-cooled electric traction drive is investigated. A dedicated thermal resistance model was developed in order to show the influence of the fluid properties on the continuous performance. For this purpose, the heat transfer parameters are adjusted in the simulation using an exponential approach in order to evaluate the cooling fluid. In a sensitivity study, density, heat capacity, thermal conductivity, and viscosity are investigated. Because viscosity, within the range investigated, shows the largest percentage deviation from the reference fluid, the greatest effect on performance can be seen here. In order to check the plausibility of the calculated results of the thermal simulation, two fluids were chosen for performance testing on a dedicated electro motor cooling (EMC) test. Beyond the investigation of heat transfer, aging of the defined fluid at maximum heat input over several hours is also evaluated. Only slight changes of the fluid properties are detected. This publication presents a thermal model for direct oil-cooled drive trains, which consider fluid properties. Furthermore, the model was tested for plausibility on real hardware.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In this publication, the cooling fluid for direct oil-cooled electric traction drive is investigated. A dedicated thermal resistance model was developed in order to show the influence of the fluid properties on the continuous performance. For this purpose, the heat transfer parameters are adjusted in the simulation using an exponential approach in order to evaluate the cooling fluid. In a sensitivity study, density, heat capacity, thermal conductivity, and viscosity are investigated. Because viscosity, within the range investigated, shows the largest percentage deviation from the reference fluid, the greatest effect on performance can be seen here. In order to check the plausibility of the calculated results of the thermal simulation, two fluids were chosen for performance testing on a dedicated electro motor cooling (EMC) test. Beyond the investigation of heat transfer, aging of the defined fluid at maximum heat input over several hours is also evaluated. Only slight changes of the fluid properties are detected. This publication presents a thermal model for direct oil-cooled drive trains, which consider fluid properties. Furthermore, the model was tested for plausibility on real hardware.
22.
Vartziotis, Dimitris
Computing Arithmetic Series by Expressing the Summands as a Sum of Ones Sonstige
2019.
@misc{Vartziotis_2019,
title = {Computing Arithmetic Series by Expressing the Summands as a Sum of Ones},
author = {Dimitris Vartziotis},
year = {2019},
date = {2019-12-01},
abstract = {This note considers the computation of arithmetic series. The aim is to derive an alternative approach to finding the formula by expanding the sum into Ones and finding geometric patterns. The general validity of the formula can then be proven by induction.},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
This note considers the computation of arithmetic series. The aim is to derive an alternative approach to finding the formula by expanding the sum into Ones and finding geometric patterns. The general validity of the formula can then be proven by induction.
23.
Pohl, S. -E., Rößler, Tobias
Digital Data Reviewer – How AI accelerates the process of thermal protection Unveröffentlicht
Presented on Daimler EDM CAE Forum, 2019.
@unpublished{PohlRoessler_2019,
title = {Digital Data Reviewer – How AI accelerates the process of thermal protection},
author = {S. -E. Pohl and Tobias Rößler},
year = {2019},
date = {2019-07-01},
howpublished = {Presented on Daimler EDM CAE Forum},
keywords = {},
pubstate = {published},
tppubtype = {unpublished}
}
24.
Murt, Musa, Kistler, Felix
Dauerlauferprobung durch automatisiertes Testfahren Unveröffentlicht
Presented on Daimler EDM CAE Forum, 2019.
@unpublished{MurtKistler_2019,
title = {Dauerlauferprobung durch automatisiertes Testfahren},
author = {Musa Murt and Felix Kistler},
year = {2019},
date = {2019-07-01},
howpublished = {Presented on Daimler EDM CAE Forum},
keywords = {},
pubstate = {published},
tppubtype = {unpublished}
}
25.
Zimmermann, Patrick, Paul, Magdalena, Ngoumou, Judith, Portail, Matthieu, Lechner, Klaus, Hönig, Gerald
Automatisierte Montageanlagenplanung Buchkapitel
In: Kompetenz Montage – kollaborativ und wandlungsfähig, S. 42–45, Frank Hees et al., 2019, ISBN: 978-3-948169-06-0.
@inbook{ZimmermannEtAl_2019,
title = {Automatisierte Montageanlagenplanung},
author = {Patrick Zimmermann and Magdalena Paul and Judith Ngoumou and Matthieu Portail and Klaus Lechner and Gerald Hönig},
isbn = {978-3-948169-06-0},
year = {2019},
date = {2019-01-01},
booktitle = {Kompetenz Montage – kollaborativ und wandlungsfähig},
pages = {42–45},
publisher = {Frank Hees et al.},
abstract = {Eine Softwarearchitektur, die aus einer verknüpften Toolkette mit Datenbanken besteht, ist ein wichtiger Meilenstein auf dem Weg zu einer vollautomatisierten Planung von Montageanlagen. Die Planung von Montageanlagen und auch die von Produktionssystemen im Allgemeinen erfordert heutzutage ein hohes Maß an Expertenwissen, das oft bei den verschiedensten am Planungsprozess beteiligten Partnern liegt. Es ist daher eine enge Abstimmung zwischen Komponentenherstellern, Anlagenbauern bzw. Systemintegratoren und Endkunden – also den tatsächlichen Betreibern der Anlagen – notwendig. Wesentliche Punkte hierbei sind das Sammeln und Formalisieren der Kundenanforderungen sowie die Auswahl, Zusammenstellung und Anordnung geeigneter Betriebsmittel, um diese Anforderungen hinreichend zu erfüllen. Während es bereits Tools zur Unterstützung einzelner Teilschritte des Planungsprozesses gibt, fehlt es an einer durchgängigen Toolkette für sämtliche Planungsschritte. Der Planungsprozess beginnt bei der Betrachtung der Anforderungen – die sich aus dem zu produzierenden Produkt ergeben – und endet bei der in Betrieb genommenen Anlage zur Fertigung des Produkts. Daher wäre es ideal, den gesamten Prozess möglichst automatisiert und mithilfe eines Tools durchführen zu können.},
keywords = {},
pubstate = {published},
tppubtype = {inbook}
}
Eine Softwarearchitektur, die aus einer verknüpften Toolkette mit Datenbanken besteht, ist ein wichtiger Meilenstein auf dem Weg zu einer vollautomatisierten Planung von Montageanlagen. Die Planung von Montageanlagen und auch die von Produktionssystemen im Allgemeinen erfordert heutzutage ein hohes Maß an Expertenwissen, das oft bei den verschiedensten am Planungsprozess beteiligten Partnern liegt. Es ist daher eine enge Abstimmung zwischen Komponentenherstellern, Anlagenbauern bzw. Systemintegratoren und Endkunden – also den tatsächlichen Betreibern der Anlagen – notwendig. Wesentliche Punkte hierbei sind das Sammeln und Formalisieren der Kundenanforderungen sowie die Auswahl, Zusammenstellung und Anordnung geeigneter Betriebsmittel, um diese Anforderungen hinreichend zu erfüllen. Während es bereits Tools zur Unterstützung einzelner Teilschritte des Planungsprozesses gibt, fehlt es an einer durchgängigen Toolkette für sämtliche Planungsschritte. Der Planungsprozess beginnt bei der Betrachtung der Anforderungen – die sich aus dem zu produzierenden Produkt ergeben – und endet bei der in Betrieb genommenen Anlage zur Fertigung des Produkts. Daher wäre es ideal, den gesamten Prozess möglichst automatisiert und mithilfe eines Tools durchführen zu können.
26.
Drewitz, Uwe, Ihme, Klas, Oehl, Michael, Schrödel, Frank, Voßwinkel, Rick, Hartwich, Franziska, Schmidt, Cornelia, Pape, Anna-Antonia, Fleischer, Tobias, Cornelsen, Sonja, Lüdtke, Andreas, Gräfing, Daniela, Trende, Alexander
Automation ohne Unsicherheit: Vorstellung des Förderprojekts AutoAkzept zur Erhöhung der Akzeptanz automatisierten Fahrens Proceedings Article
In: Mensch-Maschine-Mobilität 2019, S. 1–20, VDI Verlag, Düsseldorf, 2019, ISBN: 978-3-18-092360-4, (10. VDI Fachtagung Mensch-Maschine-Mobilität: Der (Mit-)Fahrer im 21. Jahrhundert, 05.-06. Nov 2019, Braunschweig, Deutschland).
@inproceedings{DrewitzEtAl_2019,
title = {Automation ohne Unsicherheit: Vorstellung des Förderprojekts AutoAkzept zur Erhöhung der Akzeptanz automatisierten Fahrens},
author = {Uwe Drewitz and Klas Ihme and Michael Oehl and Frank Schrödel and Rick Voßwinkel and Franziska Hartwich and Cornelia Schmidt and Anna-Antonia Pape and Tobias Fleischer and Sonja Cornelsen and Andreas Lüdtke and Daniela Gräfing and Alexander Trende},
doi = {10.51202/9783181023600},
isbn = {978-3-18-092360-4},
year = {2019},
date = {2019-01-01},
booktitle = {Mensch-Maschine-Mobilität 2019},
volume = {2360},
pages = {1–20},
publisher = {VDI Verlag},
address = {Düsseldorf},
series = {VDI-Berichte},
abstract = {Die Akzeptanz und somit Verbreitung von Systemen automatisierten und vernetzten Fahrens (AVF) wird maßgeblich durch den Grad an subjektiver Sicherheit bestimmt, den Nutzer bei der Interaktion mit den automatisierten Fahrzeugen empfinden. Nutzerseitige Akzeptanz wird insbesondere durch Empfindungen von Unsicherheit im Umfang mit automatisierten Fahrzeugen negativ beeinflusst. Das Projekt AutoAkzept entwickelt Lösungen nutzerfokussierter Automation, die die Fahrzeuginsassen ins Zentrum der Systementwicklung stellt und so deren Unsicherheit reduziert. Systeme nutzerfokussierter Automation erfassen dazu über verschiedene Sensoren Unsicherheit und deren beitragende Faktoren (z.B. Stress, Kinetose, Aktivität) in Echtzeit, integrieren diese Informationen mit Kontextdaten und leiten daraus den aktuellen Bedarf der Fahrzeuginsassen ab. In Nutzerstudien in Fahrsimulatoren und Realfahrzeugen werden mit Hilfe multimodaler Sensorik fahrzeugbezogene Informationen sowie physiologische und behaviorale Daten der Nutzer erhoben. unter Anwendung von Methoden maschinellen Lernens entwickelt AutoAkzept auf Basis dieser Daten echtzeitfähige Algorithmen und Modelle zur Abbildung von situativen Kontexten, Nutzerzuständen und Anpassungsbedarfen. Zielstellung von AutoAkzept ist die Entwicklung erfolgsversprechender Anpassungsstrategien zur Verbesserung des Nutzererlebens auf Basis der identifizierten unsicherheitsbezogenen Bedarfe. Dadurch gewährleisten die Entwicklungen des Projekts, durch Reduktion oder Vorbeugung von subjektiven Unsicherheiten, ein positives, komfortables Nutzungserleben und tragen zur Erhöhung der Akzeptanz für AVF bei.},
note = {10. VDI Fachtagung Mensch-Maschine-Mobilität: Der (Mit-)Fahrer im 21. Jahrhundert, 05.-06. Nov 2019, Braunschweig, Deutschland},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Die Akzeptanz und somit Verbreitung von Systemen automatisierten und vernetzten Fahrens (AVF) wird maßgeblich durch den Grad an subjektiver Sicherheit bestimmt, den Nutzer bei der Interaktion mit den automatisierten Fahrzeugen empfinden. Nutzerseitige Akzeptanz wird insbesondere durch Empfindungen von Unsicherheit im Umfang mit automatisierten Fahrzeugen negativ beeinflusst. Das Projekt AutoAkzept entwickelt Lösungen nutzerfokussierter Automation, die die Fahrzeuginsassen ins Zentrum der Systementwicklung stellt und so deren Unsicherheit reduziert. Systeme nutzerfokussierter Automation erfassen dazu über verschiedene Sensoren Unsicherheit und deren beitragende Faktoren (z.B. Stress, Kinetose, Aktivität) in Echtzeit, integrieren diese Informationen mit Kontextdaten und leiten daraus den aktuellen Bedarf der Fahrzeuginsassen ab. In Nutzerstudien in Fahrsimulatoren und Realfahrzeugen werden mit Hilfe multimodaler Sensorik fahrzeugbezogene Informationen sowie physiologische und behaviorale Daten der Nutzer erhoben. unter Anwendung von Methoden maschinellen Lernens entwickelt AutoAkzept auf Basis dieser Daten echtzeitfähige Algorithmen und Modelle zur Abbildung von situativen Kontexten, Nutzerzuständen und Anpassungsbedarfen. Zielstellung von AutoAkzept ist die Entwicklung erfolgsversprechender Anpassungsstrategien zur Verbesserung des Nutzererlebens auf Basis der identifizierten unsicherheitsbezogenen Bedarfe. Dadurch gewährleisten die Entwicklungen des Projekts, durch Reduktion oder Vorbeugung von subjektiven Unsicherheiten, ein positives, komfortables Nutzungserleben und tragen zur Erhöhung der Akzeptanz für AVF bei.
27.
Derr, M., Keckeisen, M.
Potentiale und Grenzen modell-basierter Methoden in einem großskaligen Systementwicklungsprozess Proceedings Article
In: prostep 2019, 2019.
@inproceedings{DerrKeckeisen_2019,
title = {Potentiale und Grenzen modell-basierter Methoden in einem großskaligen Systementwicklungsprozess},
author = {M. Derr and M. Keckeisen},
url = {https://www.prostep-ivip-symposium.org/archiv/prostep-ivip-symposium-2019/programm/},
year = {2019},
date = {2019-01-01},
booktitle = {prostep 2019},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
28.
Vartziotis, Dimitris, Bohnet, Doris, Himpel, Benjamin
GETOpt mesh smoothing: Putting GETMe in the framework of global optimization-based schemes Artikel
In: Finite Elements in Analysis and Design, Bd. 147, S. 10–20, 2018, ISSN: 0168-874X.
@article{VartziotisEtAl_2018,
title = {GETOpt mesh smoothing: Putting GETMe in the framework of global optimization-based schemes},
author = {Dimitris Vartziotis and Doris Bohnet and Benjamin Himpel},
url = {https://www.sciencedirect.com/science/article/pii/S0168874X17308880},
doi = {https://doi.org/10.1016/j.finel.2018.04.010},
issn = {0168-874X},
year = {2018},
date = {2018-08-01},
journal = {Finite Elements in Analysis and Design},
volume = {147},
pages = {10–20},
abstract = {We present a novel approach to mesh smoothing, called GETOpt, by using a variation of the Geometric Element Transformation Method (GETMe) which falls within the framework of global optimization-based schemes and mesh quality improvement methods. We introduce a global mesh quality measure, which is inspired by rigorous convergence results concerning the size of the geometric elements (non-degeneracy and comparable sizing) and whose gradient flow yields a combination of GETMe and Laplace smoothing. Under this scheme, it can be shown rigorously that the tetrahedral mesh never degenerates. Furthermore, numerical tests show that the sizing of the mesh elements become more comparable and that the FEM gives better approximations in case the PDE problem being solved demonstrates isotropic physical behavior. More specifically, we present in this article an example where the mesh is used to solve Poisson's equation using the standard Galerkin finite element method with piecewise linear and order 2 functions on the low-order mesh.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We present a novel approach to mesh smoothing, called GETOpt, by using a variation of the Geometric Element Transformation Method (GETMe) which falls within the framework of global optimization-based schemes and mesh quality improvement methods. We introduce a global mesh quality measure, which is inspired by rigorous convergence results concerning the size of the geometric elements (non-degeneracy and comparable sizing) and whose gradient flow yields a combination of GETMe and Laplace smoothing. Under this scheme, it can be shown rigorously that the tetrahedral mesh never degenerates. Furthermore, numerical tests show that the sizing of the mesh elements become more comparable and that the FEM gives better approximations in case the PDE problem being solved demonstrates isotropic physical behavior. More specifically, we present in this article an example where the mesh is used to solve Poisson’s equation using the standard Galerkin finite element method with piecewise linear and order 2 functions on the low-order mesh.
29.
Vartziotis, Dimitris, Merger, Juri
GETMe.anis: On geometric polygon transformations leading to anisotropy Sonstige
2018.
@misc{VartziotisMerger_2018a,
title = {GETMe.anis: On geometric polygon transformations leading to anisotropy},
author = {Dimitris Vartziotis and Juri Merger},
url = {https://arxiv.org/abs/1805.01767},
doi = {10.48550/ARXIV.1805.01767},
year = {2018},
date = {2018-05-01},
publisher = {arXiv},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
30.
Vartziotis, Dimitris, Merger, Juri
Contributions to the study of the non-trivial roots of the Riemann zeta-function Sonstige
2018.
@misc{VartziotisMerger_2018,
title = {Contributions to the study of the non-trivial roots of the Riemann zeta-function},
author = {Dimitris Vartziotis and Juri Merger},
url = {https://arxiv.org/abs/1804.00913},
doi = {10.48550/ARXIV.1804.00913},
year = {2018},
date = {2018-04-01},
publisher = {arXiv},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
31.
Wolf, Thomas
Alternative Darstellung in der Transferpfad-Analyse (TPA) Unveröffentlicht
Presented on Jahrestagung für Akustik DAGA 2018, 2018.
@unpublished{Wolf_2018,
title = {Alternative Darstellung in der Transferpfad-Analyse (TPA)},
author = {Thomas Wolf},
url = {http://2018.daga-tagung.de/fileadmin/2018.daga-tagung.de/programm/Feb_16_Programmheft.pdf},
year = {2018},
date = {2018-03-01},
howpublished = {Presented on Jahrestagung für Akustik DAGA 2018},
keywords = {},
pubstate = {published},
tppubtype = {unpublished}
}
32.
Bauer, Benedikt, Becker, Jan Steffen, Peikenkamp, Thomas, Schlaak, Christof, Stierand, Ingo
Entwurfsabsicherung für eingebettete Mehrkernsysteme im Kontext der ISO 26262 Proceedings Article
In: Combined Proceedings of the Workshops of the German Software Engineering Conference 2018 (SE 2018), CEUR Workshop Proceedings (CEUR-WS.org), 2018, (SE-WS 2018: Software Engineering Workshops 2018).
@inproceedings{BauerEtAl_2018,
title = {Entwurfsabsicherung für eingebettete Mehrkernsysteme im Kontext der ISO 26262},
author = {Benedikt Bauer and Jan Steffen Becker and Thomas Peikenkamp and Christof Schlaak and Ingo Stierand},
url = {http://ceur-ws.org/Vol-2066/seerts2018paper04.pdf},
year = {2018},
date = {2018-03-01},
booktitle = {Combined Proceedings of the Workshops of the German Software Engineering Conference 2018 (SE 2018)},
publisher = {CEUR Workshop Proceedings (CEUR-WS.org)},
note = {SE-WS 2018: Software Engineering Workshops 2018},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
33.
Vartziotis, Dimitris, Wipper, Joachim
The GETMe Mesh Smoothing Framework: A Geometric Way to Quality Finite Element Meshes Buch
CRC Press, 2018, ISBN: 978-0-3670-2342-3.
@book{VartziotisWipper_2018,
title = {The GETMe Mesh Smoothing Framework: A Geometric Way to Quality Finite Element Meshes},
author = {Dimitris Vartziotis and Joachim Wipper},
url = {https://www.crcpress.com/The-GETMe-Mesh-Smoothing-Framework-A-Geometric-Way-to-Quality-Finite-Element/Vartziotis-Wipper/p/book/9780367023423},
doi = {10.1201/9780429399626},
isbn = {978-0-3670-2342-3},
year = {2018},
date = {2018-01-01},
publisher = {CRC Press},
keywords = {},
pubstate = {published},
tppubtype = {book}
}
34.
Baumann, Felix W.
Thirty Thousand 3D Models from Thingiverse Artikel
In: Data, Bd. 3, Nr. 1, 2018, ISSN: 2306-5729.
@article{Baumann_2018,
title = {Thirty Thousand 3D Models from Thingiverse},
author = {Felix W. Baumann},
url = {https://www.mdpi.com/2306-5729/3/1/5},
doi = {10.3390/data3010005},
issn = {2306-5729},
year = {2018},
date = {2018-01-01},
journal = {Data},
volume = {3},
number = {1},
abstract = {This dataset contains files and geometrical analysis of 3D model data, acquired from the thingiverse online repository. More than thirty thousand stereolithography files (STL) were retrieved and analysed. The geometrical analysis of the respective models is presented along with model renderings in both GIF and PNG format, and pre-sliced machine instructions as GCode. This dataset is intended to be used as a basis for further research in Additive Manufacturing (AM), such as 3D printing time estimation, printability assessment or slicing algorithm development. All files retrieved are user-generated, with the respective user and associated licence presented in the overview. The dataset was acquired between 2016 and 2017.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
This dataset contains files and geometrical analysis of 3D model data, acquired from the thingiverse online repository. More than thirty thousand stereolithography files (STL) were retrieved and analysed. The geometrical analysis of the respective models is presented along with model renderings in both GIF and PNG format, and pre-sliced machine instructions as GCode. This dataset is intended to be used as a basis for further research in Additive Manufacturing (AM), such as 3D printing time estimation, printability assessment or slicing algorithm development. All files retrieved are user-generated, with the respective user and associated licence presented in the overview. The dataset was acquired between 2016 and 2017.
35.
Diehl, Patrick, Tabiai, Ilyass, Baumann, Felix W., Therriault, Daniel, Levesque, Martin
Long term availability of raw experimental data in experimental fracture mechanics Artikel
In: Engineering Fracture Mechanics, Bd. 197, S. 21–26, 2018, ISSN: 0013-7944.
@article{DiehlEtAl_2018,
title = {Long term availability of raw experimental data in experimental fracture mechanics},
author = {Patrick Diehl and Ilyass Tabiai and Felix W. Baumann and Daniel Therriault and Martin Levesque},
url = {https://www.sciencedirect.com/science/article/pii/S0013794418303023},
doi = {https://doi.org/10.1016/j.engfracmech.2018.04.030},
issn = {0013-7944},
year = {2018},
date = {2018-01-01},
journal = {Engineering Fracture Mechanics},
volume = {197},
pages = {21–26},
abstract = {Experimental data availability is a cornerstone for reproducibility in experimental fracture mechanics, which is crucial to the scientific method. This short communication focuses on the accessibility and long term availability of raw experimental data. The corresponding authors of the eleven most cited papers, related to experimental fracture mechanics, for every year from 2000 up to 2016, were kindly asked about the availability of the raw experimental data associated with each publication. For the 187 e-mails sent: 22.46% resulted in outdated contact information, 57.75% of the authors did received our request and did not reply, and 19.79 replied to our request. The availability of data is generally low with only 11 available data sets (5.9%). The authors identified two main issues for the lacking availability of raw experimental data. First, the ability to retrieve data is strongly attached to the possibility to contact the corresponding author. This study suggests that institutional e-mail addresses are insufficient means for obtaining experimental data sets. Second, lack of experimental data is also due that submission and publication does not require to make the raw experimental data available. The following solutions are proposed: (1) Requirement of unique identifiers, like ORCID or ResearcherID, to detach the author(s) from their institutional e-mail address, (2) Provide DOIs, like Zenodo or Dataverse, to make raw experimental data citable, and (3) grant providing organizations should ensure that experimental data by public funded projects is available to the public.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Experimental data availability is a cornerstone for reproducibility in experimental fracture mechanics, which is crucial to the scientific method. This short communication focuses on the accessibility and long term availability of raw experimental data. The corresponding authors of the eleven most cited papers, related to experimental fracture mechanics, for every year from 2000 up to 2016, were kindly asked about the availability of the raw experimental data associated with each publication. For the 187 e-mails sent: 22.46% resulted in outdated contact information, 57.75% of the authors did received our request and did not reply, and 19.79 replied to our request. The availability of data is generally low with only 11 available data sets (5.9%). The authors identified two main issues for the lacking availability of raw experimental data. First, the ability to retrieve data is strongly attached to the possibility to contact the corresponding author. This study suggests that institutional e-mail addresses are insufficient means for obtaining experimental data sets. Second, lack of experimental data is also due that submission and publication does not require to make the raw experimental data available. The following solutions are proposed: (1) Requirement of unique identifiers, like ORCID or ResearcherID, to detach the author(s) from their institutional e-mail address, (2) Provide DOIs, like Zenodo or Dataverse, to make raw experimental data citable, and (3) grant providing organizations should ensure that experimental data by public funded projects is available to the public.
36.
Vartziotis, Dimitris, Bohnet, Doris
Fractal Curves from Prime Trigonometric Series Artikel
In: Fractal and Fractional, Bd. 2, Nr. 1, 2018, ISSN: 2504-3110.
@article{VartziotisBohnet_2018,
title = {Fractal Curves from Prime Trigonometric Series},
author = {Dimitris Vartziotis and Doris Bohnet},
url = {https://www.mdpi.com/2504-3110/2/1/2},
doi = {10.3390/fractalfract2010002},
issn = {2504-3110},
year = {2018},
date = {2018-01-01},
journal = {Fractal and Fractional},
volume = {2},
number = {1},
abstract = {We study the convergence of the parameter family of series: $V_alpha, beta ( t ) = sum_p p^-alpha exp (2pi i p^beta t )$, $alpha ,beta ın mathbbR_ >0$, $t ın [ 0 , 1 )$ defined over prime numbers $p$ and, subsequently, their differentiability properties. The visible fractal nature of the graphs as a function of α , β is analyzed in terms of Hölder continuity, self-similarity and fractal dimension, backed with numerical results. Although this series is not a lacunary series, it has properties in common, such that we also discuss the link of this series with random walks and, consequently, explore its random properties numerically.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
We study the convergence of the parameter family of series: $V_alpha, beta ( t ) = sum_p p^-alpha exp (2pi i p^beta t )$, $alpha ,beta ın mathbbR_ >0$, $t ın [ 0 , 1 )$ defined over prime numbers $p$ and, subsequently, their differentiability properties. The visible fractal nature of the graphs as a function of α , β is analyzed in terms of Hölder continuity, self-similarity and fractal dimension, backed with numerical results. Although this series is not a lacunary series, it has properties in common, such that we also discuss the link of this series with random walks and, consequently, explore its random properties numerically.
37.
König, Christian F. J., Meisl, Gerd, Balcu, Natalia, Vosseler, Benjamin, Hörmann, Henrik, Höll, Jos, Fäßler, Victor
Engineering of Cyber-Physical Systems in the Automotive Context: Case Study of a Range Prediction Assistant Proceedings Article
In: Margaria, Tiziana, Steffen, Bernhard (Hrsg.): Leveraging Applications of Formal Methods, Verification and Validation. Distributed Systems, S. 461–476, Springer International Publishing, 2018, ISBN: 978-3-030-03424-5.
@inproceedings{KoenigEtAl_2018,
title = {Engineering of Cyber-Physical Systems in the Automotive Context: Case Study of a Range Prediction Assistant},
author = {Christian F. J. König and Gerd Meisl and Natalia Balcu and Benjamin Vosseler and Henrik Hörmann and Jos Höll and Victor Fäßler},
editor = {Tiziana Margaria and Bernhard Steffen},
doi = {10.1007/978-3-030-03424-5_31},
isbn = {978-3-030-03424-5},
year = {2018},
date = {2018-01-01},
booktitle = {Leveraging Applications of Formal Methods, Verification and Validation. Distributed Systems},
pages = {461–476},
publisher = {Springer International Publishing},
abstract = {Cyber-Physical Systems (CPS) are complex systems that combine features from different domains, such as control engineering, mechanical engineering or software engineering. Development of such CPS requires methods and tools from various disciplines, using different formalisms. Furthermore, for efficient development of these CPS, the engineering tools ideally support the whole development cycle and the life cycle of the CPS. This calls for a Systems Engineering approach to tackle the complexity of the engineering task under the constraints of short time-to-market. This paper presents a case study on the development of a CPS in the automotive context, where an assistant for estimating the range of an electric vehicle is developed. This case study illustrates the benefits of a modern tool-chain that is based on the Systems Engineering approach. In addition, an outlook is given on the development of similar tool-chains for the domain of automotive production planning. The benefits from applying open tool-chains in the engineering of CPS in the automotive domain is discussed.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Cyber-Physical Systems (CPS) are complex systems that combine features from different domains, such as control engineering, mechanical engineering or software engineering. Development of such CPS requires methods and tools from various disciplines, using different formalisms. Furthermore, for efficient development of these CPS, the engineering tools ideally support the whole development cycle and the life cycle of the CPS. This calls for a Systems Engineering approach to tackle the complexity of the engineering task under the constraints of short time-to-market. This paper presents a case study on the development of a CPS in the automotive context, where an assistant for estimating the range of an electric vehicle is developed. This case study illustrates the benefits of a modern tool-chain that is based on the Systems Engineering approach. In addition, an outlook is given on the development of similar tool-chains for the domain of automotive production planning. The benefits from applying open tool-chains in the engineering of CPS in the automotive domain is discussed.
38.
Baumann, Felix W., Odefey, Ulrich, Hudert, Sebastian, Falkenthal, Michael, Breitenbücher, Uwe
Utilising the Tor Network for IoT Addressing and Connectivity Proceedings Article
In: Proceedings of the 8th International Conference on Cloud Computing and Services Science – CLOSER, S. 27–34, INSTICC SciTePress, 2018, ISSN: 2184-5042.
@inproceedings{BaumannEtAl_2018,
title = {Utilising the Tor Network for IoT Addressing and Connectivity},
author = {Felix W. Baumann and Ulrich Odefey and Sebastian Hudert and Michael Falkenthal and Uwe Breitenbücher},
doi = {10.5220/0006591500270034},
issn = {2184-5042},
year = {2018},
date = {2018-01-01},
booktitle = {Proceedings of the 8th International Conference on Cloud Computing and Services Science - CLOSER},
pages = {27–34},
publisher = {SciTePress},
organization = {INSTICC},
abstract = {For Internet of Things (IoT) devices and cyber-physical systems (CPS), it is required to connect them securely and reliably to some form of cloud environment or computing entity for control, management and utilisation. The Internet is a suitable, standardized, and proven means for the connection of IoT devices in various scenarios. Connection over the Internet utilises existing protocols, standards, technologies and avoids investment in new, specialised concepts. Thereby, this connection requires a transparent addressing schema which is commonly TCP/IP, using domain names and IP addresses. However, in industrial, commercial and private networks, the addressability and connectability/connectivity is often limited by firewalls, proxies and router configurations utilising NAT. Thus, the present network configurations hinder the establishment of connections between IoT devices across different locations. Therefore, the method for connecting IoT devices in a client-server configu ration proposed herein utilises the Tor (previously: The onion router/routing) network for addressing of and secured communication to IoT and CPS devices. It is an overlay protocol that was designed to allow for robust and anonymous communication. The benefit of this approach is to enable addressability and connectivity of IoT devices in firewalled and potentially unknown and changing network environments, thus allowing for IoT devices to be used reliably behind firewalls as long as outgoing communication is not blocked.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
For Internet of Things (IoT) devices and cyber-physical systems (CPS), it is required to connect them securely and reliably to some form of cloud environment or computing entity for control, management and utilisation. The Internet is a suitable, standardized, and proven means for the connection of IoT devices in various scenarios. Connection over the Internet utilises existing protocols, standards, technologies and avoids investment in new, specialised concepts. Thereby, this connection requires a transparent addressing schema which is commonly TCP/IP, using domain names and IP addresses. However, in industrial, commercial and private networks, the addressability and connectability/connectivity is often limited by firewalls, proxies and router configurations utilising NAT. Thus, the present network configurations hinder the establishment of connections between IoT devices across different locations. Therefore, the method for connecting IoT devices in a client-server configu ration proposed herein utilises the Tor (previously: The onion router/routing) network for addressing of and secured communication to IoT and CPS devices. It is an overlay protocol that was designed to allow for robust and anonymous communication. The benefit of this approach is to enable addressability and connectivity of IoT devices in firewalled and potentially unknown and changing network environments, thus allowing for IoT devices to be used reliably behind firewalls as long as outgoing communication is not blocked.
39.
Keckeisen, M.
Innovative Softwarelösungen für die Fahrzeugentwicklung – Anwendungen für das Parallele Rechnen Proceedings Article
In: parallel 2018, 2018, (Conference presentation).
@inproceedings{Keckeisen_2018,
title = {Innovative Softwarelösungen für die Fahrzeugentwicklung – Anwendungen für das Parallele Rechnen},
author = {M. Keckeisen},
url = {https://www.heise.de/news/parallel-2018-Automotive-Experte-Michael-Keckeisen-haelt-zweite-Keynote-3970416.html},
year = {2018},
date = {2018-01-01},
booktitle = {parallel 2018},
note = {Conference presentation},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
40.
Vartziotis, Dimitris, Himpel, Benjamin, Pfeil, Markus
Creation of higher-energy superposition quantum states motivated by geometric transformations Sonstige
2017.
@misc{VartziotisEtAl_2017,
title = {Creation of higher-energy superposition quantum states motivated by geometric transformations},
author = {Dimitris Vartziotis and Benjamin Himpel and Markus Pfeil},
url = {https://arxiv.org/abs/1712.07963},
doi = {https://doi.org/10.48550/arXiv.1712.07963},
year = {2017},
date = {2017-12-01},
publisher = {arXiv},
abstract = {We suggest a way to produce higher-energy superposition states in a circular system of quantum wells. This is inspired by a link to convergence results for geometric transformations of polygons using circulant Hermitian matrices.},
keywords = {},
pubstate = {published},
tppubtype = {misc}
}
We suggest a way to produce higher-energy superposition states in a circular system of quantum wells. This is inspired by a link to convergence results for geometric transformations of polygons using circulant Hermitian matrices.
DE 
EN 