---
_id: '31545'
abstract:
- lang: eng
text: Knowledge graph embedding research has mainly focused on learning continuous
representations of entities and relations tailored towards the link prediction
problem. Recent results indicate an ever increasing predictive ability of current
approaches on benchmark datasets. However, this effectiveness often comes with
the cost of over-parameterization and increased computationally complexity. The
former induces extensive hyperparameter optimization to mitigate malicious overfitting.
The latter magnifies the importance of winning the hardware lottery. Here, we
investigate a remedy for the first problem. We propose a technique based on Kronecker
decomposition to reduce the number of parameters in a knowledge graph embedding
model, while retaining its expressiveness. Through Kronecker decomposition, large
embedding matrices are split into smaller embedding matrices during the training
process. Hence, embeddings of knowledge graphs are not plainly retrieved but reconstructed
on the fly. The decomposition ensures that elementwise interactions between three
embedding vectors are extended with interactions within each embedding vector.
This implicitly reduces redundancy in embedding vectors and encourages feature
reuse. To quantify the impact of applying Kronecker decomposition on embedding
matrices, we conduct a series of experiments on benchmark datasets. Our experiments
suggest that applying Kronecker decomposition on embedding matrices leads to an
improved parameter efficiency on all benchmark datasets. Moreover, empirical evidence
suggests that reconstructed embeddings entail robustness against noise in the
input knowledge graph. To foster reproducible research, we provide an open-source
implementation of our approach, including training and evaluation scripts as well
as pre-trained models in our knowledge graph embedding framework.
author:
- first_name: Caglar
full_name: Demir, Caglar
id: '43817'
last_name: Demir
- first_name: Julian
full_name: Lienen, Julian
id: '44040'
last_name: Lienen
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
citation:
ama: Demir C, Lienen J, Ngonga Ngomo A-C. Kronecker Decomposition for Knowledge
Graph Embeddings. arXiv:220506560. Published online 2022.
apa: Demir, C., Lienen, J., & Ngonga Ngomo, A.-C. (2022). Kronecker Decomposition
for Knowledge Graph Embeddings. In arXiv:2205.06560.
bibtex: '@article{Demir_Lienen_Ngonga Ngomo_2022, title={Kronecker Decomposition
for Knowledge Graph Embeddings}, journal={arXiv:2205.06560}, author={Demir, Caglar
and Lienen, Julian and Ngonga Ngomo, Axel-Cyrille}, year={2022} }'
chicago: Demir, Caglar, Julian Lienen, and Axel-Cyrille Ngonga Ngomo. “Kronecker
Decomposition for Knowledge Graph Embeddings.” ArXiv:2205.06560, 2022.
ieee: C. Demir, J. Lienen, and A.-C. Ngonga Ngomo, “Kronecker Decomposition for
Knowledge Graph Embeddings,” arXiv:2205.06560. 2022.
mla: Demir, Caglar, et al. “Kronecker Decomposition for Knowledge Graph Embeddings.”
ArXiv:2205.06560, 2022.
short: C. Demir, J. Lienen, A.-C. Ngonga Ngomo, ArXiv:2205.06560 (2022).
date_created: 2022-05-31T07:04:36Z
date_updated: 2022-05-31T07:05:50Z
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2205.06560
oa: '1'
publication: arXiv:2205.06560
status: public
title: Kronecker Decomposition for Knowledge Graph Embeddings
type: preprint
user_id: '44040'
year: '2022'
...
---
_id: '31546'
abstract:
- lang: eng
text: In semi-supervised learning, the paradigm of self-training refers to the idea
of learning from pseudo-labels suggested by the learner itself. Across various
domains, corresponding methods have proven effective and achieve state-of-the-art
performance. However, pseudo-labels typically stem from ad-hoc heuristics, relying
on the quality of the predictions though without guaranteeing their validity.
One such method, so-called credal self-supervised learning, maintains pseudo-supervision
in the form of sets of (instead of single) probability distributions over labels,
thereby allowing for a flexible yet uncertainty-aware labeling. Again, however,
there is no justification beyond empirical effectiveness. To address this deficiency,
we make use of conformal prediction, an approach that comes with guarantees on
the validity of set-valued predictions. As a result, the construction of credal
sets of labels is supported by a rigorous theoretical foundation, leading to better
calibrated and less error-prone supervision for unlabeled data. Along with this,
we present effective algorithms for learning from credal self-supervision. An
empirical study demonstrates excellent calibration properties of the pseudo-supervision,
as well as the competitiveness of our method on several benchmark datasets.
author:
- first_name: Julian
full_name: Lienen, Julian
id: '44040'
last_name: Lienen
- first_name: Caglar
full_name: Demir, Caglar
id: '43817'
last_name: Demir
- first_name: Eyke
full_name: Hüllermeier, Eyke
id: '48129'
last_name: Hüllermeier
citation:
ama: Lienen J, Demir C, Hüllermeier E. Conformal Credal Self-Supervised Learning.
arXiv:220515239. Published online 2022.
apa: Lienen, J., Demir, C., & Hüllermeier, E. (2022). Conformal Credal Self-Supervised
Learning. In arXiv:2205.15239.
bibtex: '@article{Lienen_Demir_Hüllermeier_2022, title={Conformal Credal Self-Supervised
Learning}, journal={arXiv:2205.15239}, author={Lienen, Julian and Demir, Caglar
and Hüllermeier, Eyke}, year={2022} }'
chicago: Lienen, Julian, Caglar Demir, and Eyke Hüllermeier. “Conformal Credal Self-Supervised
Learning.” ArXiv:2205.15239, 2022.
ieee: J. Lienen, C. Demir, and E. Hüllermeier, “Conformal Credal Self-Supervised
Learning,” arXiv:2205.15239. 2022.
mla: Lienen, Julian, et al. “Conformal Credal Self-Supervised Learning.” ArXiv:2205.15239,
2022.
short: J. Lienen, C. Demir, E. Hüllermeier, ArXiv:2205.15239 (2022).
date_created: 2022-05-31T07:05:36Z
date_updated: 2022-05-31T07:05:54Z
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2205.15239
oa: '1'
publication: arXiv:2205.15239
status: public
title: Conformal Credal Self-Supervised Learning
type: preprint
user_id: '44040'
year: '2022'
...
---
_id: '31556'
abstract:
- lang: ger
text: Mehrzieloptimierung behandelt Probleme, bei denen mehrere skalare Zielfunktionen
simultan optimiert werden sollen. Ein Punkt ist in diesem Fall optimal, wenn es
keinen anderen Punkt gibt, der mindestens genauso gut ist in allen Zielfunktionen
und besser in mindestens einer Zielfunktion. Ein notwendiges Optimalitätskriterium
lässt sich über Ableitungsinformationen erster Ordnung der Zielfunktionen herleiten.
Die Menge der Punkte, die dieses notwendige Kriterium erfüllen, wird als Pareto-kritische
Menge bezeichnet. Diese Arbeit enthält neue Resultate über Pareto-kritische Mengen
für glatte und nicht-glatte Mehrzieloptimierungsprobleme, sowohl was deren Berechnung
betrifft als auch deren Struktur. Im glatten Fall erfolgt die Berechnung über
ein Fortsetzungsverfahren, im nichtglatten Fall über ein Abstiegsverfahren. Anschließend
wird die Struktur des Randes der Pareto-kritischen Menge analysiert, welcher aus
Pareto-kritischen Mengen kleinerer Subprobleme besteht. Schlussendlich werden
inverse Probleme betrachtet, bei denen zu einer gegebenen Datenmenge ein Zielfunktionsvektor
gefunden werden soll, für den die Datenpunkte kritisch sind.
- lang: eng
text: Multiobjective optimization is concerned with the simultaneous optimization
of multiple scalar-valued functions. In this case, a point is optimal if there
is no other point that is at least as good in all objectives and better in at
least one objective. A necessary condition for optimality can be derived based
on first-order information of the objectives. The set of points that satisfy this
necessary condition is called the Pareto critical set. This thesis presents new
results about Pareto critical sets for smooth and nonsmooth multiobjective optimization
problems, both in terms of their efficient computation and structural properties.
In the smooth case they are computed via a continuation method and in the nonsmooth
case via a descent method. Afterwards, the structure of the boundary of the Pareto
critical set is analyzed, which consists of Pareto critical sets of smaller subproblems.
Finally, inverse problems are considered, where a data set is given and an objective
vector is sought for which the data points are critical.
author:
- first_name: Bennet
full_name: Gebken, Bennet
id: '32643'
last_name: Gebken
citation:
ama: Gebken B. Computation and Analysis of Pareto Critical Sets in Smooth and
Nonsmooth Multiobjective Optimization.; 2022. doi:10.17619/UNIPB/1-1327
apa: Gebken, B. (2022). Computation and analysis of Pareto critical sets in smooth
and nonsmooth multiobjective optimization. https://doi.org/10.17619/UNIPB/1-1327
bibtex: '@book{Gebken_2022, title={Computation and analysis of Pareto critical sets
in smooth and nonsmooth multiobjective optimization}, DOI={10.17619/UNIPB/1-1327},
author={Gebken, Bennet}, year={2022} }'
chicago: Gebken, Bennet. Computation and Analysis of Pareto Critical Sets in
Smooth and Nonsmooth Multiobjective Optimization, 2022. https://doi.org/10.17619/UNIPB/1-1327.
ieee: B. Gebken, Computation and analysis of Pareto critical sets in smooth and
nonsmooth multiobjective optimization. 2022.
mla: Gebken, Bennet. Computation and Analysis of Pareto Critical Sets in Smooth
and Nonsmooth Multiobjective Optimization. 2022, doi:10.17619/UNIPB/1-1327.
short: B. Gebken, Computation and Analysis of Pareto Critical Sets in Smooth and
Nonsmooth Multiobjective Optimization, 2022.
date_created: 2022-06-01T06:48:08Z
date_updated: 2022-06-01T07:13:09Z
department:
- _id: '101'
doi: 10.17619/UNIPB/1-1327
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://digital.ub.uni-paderborn.de/hs/download/pdf/6531779
oa: '1'
status: public
supervisor:
- first_name: Michael
full_name: Dellnitz, Michael
last_name: Dellnitz
title: Computation and analysis of Pareto critical sets in smooth and nonsmooth multiobjective
optimization
type: dissertation
user_id: '32643'
year: '2022'
...
---
_id: '31574'
abstract:
- lang: eng
text: We model negative polarization, which is observed for planetary regoliths
at backscattering, solving a full wave problem of light scattering with a numerically
exact Discontinuous Galerkin Time Domain (DGTD) method. Pieces of layers with
the bulk packing density of particles close to 0.5 are used. The model particles
are highly absorbing and have irregular shapes and sizes larger than the wavelength
of light. This represents a realistic analog of low-albedo planetary regoliths.
Our simulations confirm coherent backscattering mechanism of the origin of negative
polarization. We show that angular profiles of polarization are stabilized if
the number of particles in a layer piece becomes larger than ten. This allows
application of our approach to the negative polarization modeling for planetary
regoliths.
author:
- first_name: Yevgen
full_name: Grynko, Yevgen
id: '26059'
last_name: Grynko
- first_name: Yuriy
full_name: Shkuratov, Yuriy
last_name: Shkuratov
- first_name: Samer
full_name: Alhaddad, Samer
id: '42456'
last_name: Alhaddad
- first_name: Jens
full_name: Förstner, Jens
id: '158'
last_name: Förstner
orcid: 0000-0001-7059-9862
citation:
ama: Grynko Y, Shkuratov Y, Alhaddad S, Förstner J. Negative polarization of light
at backscattering from a numerical analog of planetary regoliths. Icarus.
2022;384:115099. doi:10.1016/j.icarus.2022.115099
apa: Grynko, Y., Shkuratov, Y., Alhaddad, S., & Förstner, J. (2022). Negative
polarization of light at backscattering from a numerical analog of planetary regoliths.
Icarus, 384, 115099. https://doi.org/10.1016/j.icarus.2022.115099
bibtex: '@article{Grynko_Shkuratov_Alhaddad_Förstner_2022, title={Negative polarization
of light at backscattering from a numerical analog of planetary regoliths}, volume={384},
DOI={10.1016/j.icarus.2022.115099},
journal={Icarus}, publisher={Elsevier BV}, author={Grynko, Yevgen and Shkuratov,
Yuriy and Alhaddad, Samer and Förstner, Jens}, year={2022}, pages={115099} }'
chicago: 'Grynko, Yevgen, Yuriy Shkuratov, Samer Alhaddad, and Jens Förstner. “Negative
Polarization of Light at Backscattering from a Numerical Analog of Planetary Regoliths.”
Icarus 384 (2022): 115099. https://doi.org/10.1016/j.icarus.2022.115099.'
ieee: 'Y. Grynko, Y. Shkuratov, S. Alhaddad, and J. Förstner, “Negative polarization
of light at backscattering from a numerical analog of planetary regoliths,” Icarus,
vol. 384, p. 115099, 2022, doi: 10.1016/j.icarus.2022.115099.'
mla: Grynko, Yevgen, et al. “Negative Polarization of Light at Backscattering from
a Numerical Analog of Planetary Regoliths.” Icarus, vol. 384, Elsevier
BV, 2022, p. 115099, doi:10.1016/j.icarus.2022.115099.
short: Y. Grynko, Y. Shkuratov, S. Alhaddad, J. Förstner, Icarus 384 (2022) 115099.
date_created: 2022-06-01T18:53:35Z
date_updated: 2022-06-01T18:57:51Z
ddc:
- '530'
department:
- _id: '61'
doi: 10.1016/j.icarus.2022.115099
file:
- access_level: open_access
content_type: application/pdf
creator: fossie
date_created: 2022-06-01T18:56:44Z
date_updated: 2022-06-01T18:56:44Z
file_id: '31575'
file_name: 2022-06 Grynko - Icarus - Negative polarization of light at backscattering
from a numerical analog of planetary regoliths.pdf
file_size: 1419286
relation: main_file
file_date_updated: 2022-06-01T18:56:44Z
has_accepted_license: '1'
intvolume: ' 384'
keyword:
- tet_topic_scattering
language:
- iso: eng
oa: '1'
page: '115099'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: Icarus
publication_identifier:
issn:
- 0019-1035
publication_status: published
publisher: Elsevier BV
status: public
title: Negative polarization of light at backscattering from a numerical analog of
planetary regoliths
type: journal_article
user_id: '158'
volume: 384
year: '2022'
...
---
_id: '32864'
abstract:
- lang: eng
text: The further development of in-mold-assembly (IMA) technologies for structural
hybrid components is of great importance for increasing the economic efficiency
and thus the application potential. This paper presents an innovative IMA process
concept for the manufacturing of bending loaded hybrid components consisting of
two outer metal belts and an inner core structure made of glass mat reinforced
thermoplastic (GMT). In this process, the core structure, which is provided with
stiffening ribs and functional elements, is formed and joined to two metal belts
in one single step. For experimental validation of the concept, the development
of a prototypic molding tool and the manufacturing of hybrid beams including process
parameters are described. Three-point bending tests and optical measurement technologies
are used to characterize the failure behavior and mechanical properties of the
produced hybrid beams. It was found that the innovative IMA process enables the
manufacturing of hybrid components with high energy absorption and low weight
in one step. The mass-specific energy absorption is increased by 693 % compared
to pure GMT beams.
author:
- first_name: Tim
full_name: Stallmeister, Tim
last_name: Stallmeister
- first_name: Thomas
full_name: Tröster, Thomas
last_name: Tröster
citation:
ama: Stallmeister T, Tröster T. In-Mold-Assembly of Hybrid Bending Structures by
Compression Molding. Key Engineering Materials. 2022;926:1457-1467. doi:10.4028/p-5fxp53
apa: Stallmeister, T., & Tröster, T. (2022). In-Mold-Assembly of Hybrid Bending
Structures by Compression Molding. Key Engineering Materials, 926,
1457–1467. https://doi.org/10.4028/p-5fxp53
bibtex: '@article{Stallmeister_Tröster_2022, title={In-Mold-Assembly of Hybrid Bending
Structures by Compression Molding}, volume={926}, DOI={10.4028/p-5fxp53},
journal={Key Engineering Materials}, publisher={Trans Tech Publications, Ltd.},
author={Stallmeister, Tim and Tröster, Thomas}, year={2022}, pages={1457–1467}
}'
chicago: 'Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending
Structures by Compression Molding.” Key Engineering Materials 926 (2022):
1457–67. https://doi.org/10.4028/p-5fxp53.'
ieee: 'T. Stallmeister and T. Tröster, “In-Mold-Assembly of Hybrid Bending Structures
by Compression Molding,” Key Engineering Materials, vol. 926, pp. 1457–1467,
2022, doi: 10.4028/p-5fxp53.'
mla: Stallmeister, Tim, and Thomas Tröster. “In-Mold-Assembly of Hybrid Bending
Structures by Compression Molding.” Key Engineering Materials, vol. 926,
Trans Tech Publications, Ltd., 2022, pp. 1457–67, doi:10.4028/p-5fxp53.
short: T. Stallmeister, T. Tröster, Key Engineering Materials 926 (2022) 1457–1467.
date_created: 2022-08-17T05:59:05Z
date_updated: 2022-08-17T06:02:07Z
doi: 10.4028/p-5fxp53
intvolume: ' 926'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- General Materials Science
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.scientific.net/KEM.926.1457
oa: '1'
page: 1457-1467
publication: Key Engineering Materials
publication_identifier:
issn:
- 1662-9795
publication_status: published
publisher: Trans Tech Publications, Ltd.
status: public
title: In-Mold-Assembly of Hybrid Bending Structures by Compression Molding
type: journal_article
user_id: '45538'
volume: 926
year: '2022'
...
---
_id: '33033'
author:
- first_name: Lukas
full_name: Fehring, Lukas
id: '75695'
last_name: Fehring
citation:
ama: Fehring L. Combined Ranking and Regression Trees for Algorithm Selection.;
2022.
apa: Fehring, L. (2022). Combined Ranking and Regression Trees for Algorithm
Selection.
bibtex: '@book{Fehring_2022, place={Paderborn}, title={Combined Ranking and Regression
Trees for Algorithm Selection}, author={Fehring, Lukas}, year={2022} }'
chicago: Fehring, Lukas. Combined Ranking and Regression Trees for Algorithm
Selection. Paderborn, 2022.
ieee: L. Fehring, Combined Ranking and Regression Trees for Algorithm Selection.
Paderborn, 2022.
mla: Fehring, Lukas. Combined Ranking and Regression Trees for Algorithm Selection.
2022.
short: L. Fehring, Combined Ranking and Regression Trees for Algorithm Selection,
Paderborn, 2022.
date_created: 2022-08-19T09:41:14Z
date_updated: 2022-08-20T07:02:04Z
ddc:
- '006'
department:
- _id: '34'
- _id: '7'
- _id: '26'
file:
- access_level: open_access
content_type: application/pdf
creator: ahetzer
date_created: 2022-08-19T09:39:57Z
date_updated: 2022-08-19T09:39:57Z
file_id: '33034'
file_name: Final Bachelor Thesis.pdf
file_size: 24830795
relation: main_file
file_date_updated: 2022-08-19T09:39:57Z
has_accepted_license: '1'
language:
- iso: eng
oa: '1'
place: Paderborn
project:
- _id: '1'
name: 'SFB 901: SFB 901'
- _id: '3'
name: 'SFB 901 - B: SFB 901 - Project Area B'
- _id: '10'
name: 'SFB 901 - B2: SFB 901 - Subproject B2'
status: public
title: Combined Ranking and Regression Trees for Algorithm Selection
type: bachelorsthesis
user_id: '38209'
year: '2022'
...
---
_id: '33150'
abstract:
- lang: eng
text: In this article, we build on previous work to present an optimization algorithm
for nonlinearly constrained multi-objective optimization problems. The algorithm
combines a surrogate-assisted derivative-free trust-region approach with the filter
method known from single-objective optimization. Instead of the true objective
and constraint functions, so-called fully linear models are employed and we show
how to deal with the gradient inexactness in the composite step setting, adapted
from single-objective optimization as well. Under standard assumptions, we prove
convergence of a subset of iterates to a quasi-stationary point and if constraint
qualifications hold, then the limit point is also a KKT-point of the multi-objective
problem.
author:
- first_name: Manuel Bastian
full_name: Berkemeier, Manuel Bastian
id: '51701'
last_name: Berkemeier
- first_name: Sebastian
full_name: Peitz, Sebastian
id: '47427'
last_name: Peitz
orcid: 0000-0002-3389-793X
citation:
ama: Berkemeier MB, Peitz S. Multi-Objective Trust-Region Filter Method for Nonlinear
Constraints using Inexact Gradients. arXiv:220812094. Published online
2022.
apa: Berkemeier, M. B., & Peitz, S. (2022). Multi-Objective Trust-Region Filter
Method for Nonlinear Constraints using Inexact Gradients. In arXiv:2208.12094.
bibtex: '@article{Berkemeier_Peitz_2022, title={Multi-Objective Trust-Region Filter
Method for Nonlinear Constraints using Inexact Gradients}, journal={arXiv:2208.12094},
author={Berkemeier, Manuel Bastian and Peitz, Sebastian}, year={2022} }'
chicago: Berkemeier, Manuel Bastian, and Sebastian Peitz. “Multi-Objective Trust-Region
Filter Method for Nonlinear Constraints Using Inexact Gradients.” ArXiv:2208.12094,
2022.
ieee: M. B. Berkemeier and S. Peitz, “Multi-Objective Trust-Region Filter Method
for Nonlinear Constraints using Inexact Gradients,” arXiv:2208.12094. 2022.
mla: Berkemeier, Manuel Bastian, and Sebastian Peitz. “Multi-Objective Trust-Region
Filter Method for Nonlinear Constraints Using Inexact Gradients.” ArXiv:2208.12094,
2022.
short: M.B. Berkemeier, S. Peitz, ArXiv:2208.12094 (2022).
date_created: 2022-08-26T06:08:06Z
date_updated: 2022-08-26T06:12:10Z
department:
- _id: '101'
- _id: '655'
external_id:
arxiv:
- '2208.12094'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/pdf/2208.12094
oa: '1'
publication: arXiv:2208.12094
status: public
title: Multi-Objective Trust-Region Filter Method for Nonlinear Constraints using
Inexact Gradients
type: preprint
user_id: '47427'
year: '2022'
...
---
_id: '33306'
author:
- first_name: Amanda Sophie
full_name: Fiege, Amanda Sophie
last_name: Fiege
- first_name: Stefan
full_name: Pape, Stefan
id: '29061'
last_name: Pape
citation:
ama: 'Fiege AS, Pape S. Moodle in der Hochschullehre: Struktur durch HTML-Code.
In: Krähwinkel T, ed. #MoodleKannMehr – nicht nur im Distanzunterricht! .
1st ed. Visual Ink Publishing; 2022:76-78.'
apa: 'Fiege, A. S., & Pape, S. (2022). Moodle in der Hochschullehre: Struktur
durch HTML-Code. In T. Krähwinkel (Ed.), #MoodleKannMehr – nicht nur im Distanzunterricht!
(1st ed., pp. 76–78). Visual Ink Publishing.'
bibtex: '@inbook{Fiege_Pape_2022, edition={1}, title={Moodle in der Hochschullehre:
Struktur durch HTML-Code}, booktitle={#MoodleKannMehr – nicht nur im Distanzunterricht!
}, publisher={Visual Ink Publishing}, author={Fiege, Amanda Sophie and Pape, Stefan},
editor={Krähwinkel, Tanja}, year={2022}, pages={76–78} }'
chicago: 'Fiege, Amanda Sophie, and Stefan Pape. “Moodle in der Hochschullehre:
Struktur durch HTML-Code.” In #MoodleKannMehr – nicht nur im Distanzunterricht!
, edited by Tanja Krähwinkel, 1st ed., 76–78. Visual Ink Publishing, 2022.'
ieee: 'A. S. Fiege and S. Pape, “Moodle in der Hochschullehre: Struktur durch HTML-Code,”
in #MoodleKannMehr – nicht nur im Distanzunterricht! , 1st ed., T. Krähwinkel,
Ed. Visual Ink Publishing, 2022, pp. 76–78.'
mla: 'Fiege, Amanda Sophie, and Stefan Pape. “Moodle in der Hochschullehre: Struktur
durch HTML-Code.” #MoodleKannMehr – nicht nur im Distanzunterricht! , edited
by Tanja Krähwinkel, 1st ed., Visual Ink Publishing, 2022, pp. 76–78.'
short: 'A.S. Fiege, S. Pape, in: T. Krähwinkel (Ed.), #MoodleKannMehr – nicht nur
im Distanzunterricht! , 1st ed., Visual Ink Publishing, 2022, pp. 76–78.'
date_created: 2022-09-08T11:38:01Z
date_updated: 2022-09-08T11:41:27Z
department:
- _id: '1'
edition: '1'
editor:
- first_name: Tanja
full_name: Krähwinkel, Tanja
last_name: Krähwinkel
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://visual-books.com/download/3103/
oa: '1'
page: 76 - 78
publication: '#MoodleKannMehr – nicht nur im Distanzunterricht! '
publication_identifier:
isbn:
- 978-3-96784-19-3
publication_status: published
publisher: Visual Ink Publishing
status: public
title: 'Moodle in der Hochschullehre: Struktur durch HTML-Code'
type: book_chapter
user_id: '29061'
year: '2022'
...
---
_id: '33307'
author:
- first_name: Stefan
full_name: Pape, Stefan
id: '29061'
last_name: Pape
- first_name: Amanda Sophie
full_name: Fiege, Amanda Sophie
last_name: Fiege
- first_name: Ilka
full_name: Mindt, Ilka
id: '32079'
last_name: Mindt
citation:
ama: 'Pape S, Fiege AS, Mindt I. Authentic Englishes.nrw – Developing and Using
Interactive Teaching and Learning Materials on Varieties of English. In: Wawra
D, Rose J, eds. Selected Papers from the 2021 Conference of the German Association
for the Study of English. Vol 33.2. Anglistik. Universitätsverlag Winter;
:15-27. doi:10.33675/ANGL/2022/2/6'
apa: 'Pape, S., Fiege, A. S., & Mindt, I. (n.d.). Authentic Englishes.nrw –
Developing and Using Interactive Teaching and Learning Materials on Varieties
of English. In D. Wawra & J. Rose (Eds.), Selected Papers from the 2021
Conference of the German Association for the Study of English: Vol. 33.2 (pp.
15–27). Universitätsverlag Winter. https://doi.org/10.33675/ANGL/2022/2/6'
bibtex: '@inbook{Pape_Fiege_Mindt, place={Heidelberg}, series={Anglistik}, title={Authentic
Englishes.nrw – Developing and Using Interactive Teaching and Learning Materials
on Varieties of English}, volume={33.2}, DOI={10.33675/ANGL/2022/2/6},
booktitle={Selected Papers from the 2021 Conference of the German Association
for the Study of English}, publisher={Universitätsverlag Winter}, author={Pape,
Stefan and Fiege, Amanda Sophie and Mindt, Ilka}, editor={Wawra, Daniela and Rose,
Jonathan}, pages={15–27}, collection={Anglistik} }'
chicago: 'Pape, Stefan, Amanda Sophie Fiege, and Ilka Mindt. “Authentic Englishes.Nrw
– Developing and Using Interactive Teaching and Learning Materials on Varieties
of English.” In Selected Papers from the 2021 Conference of the German Association
for the Study of English, edited by Daniela Wawra and Jonathan Rose, 33.2:15–27.
Anglistik. Heidelberg: Universitätsverlag Winter, n.d. https://doi.org/10.33675/ANGL/2022/2/6.'
ieee: 'S. Pape, A. S. Fiege, and I. Mindt, “Authentic Englishes.nrw – Developing
and Using Interactive Teaching and Learning Materials on Varieties of English,”
in Selected Papers from the 2021 Conference of the German Association for the
Study of English, vol. 33.2, D. Wawra and J. Rose, Eds. Heidelberg: Universitätsverlag
Winter, pp. 15–27.'
mla: Pape, Stefan, et al. “Authentic Englishes.Nrw – Developing and Using Interactive
Teaching and Learning Materials on Varieties of English.” Selected Papers from
the 2021 Conference of the German Association for the Study of English, edited
by Daniela Wawra and Jonathan Rose, vol. 33.2, Universitätsverlag Winter, pp.
15–27, doi:10.33675/ANGL/2022/2/6.
short: 'S. Pape, A.S. Fiege, I. Mindt, in: D. Wawra, J. Rose (Eds.), Selected Papers
from the 2021 Conference of the German Association for the Study of English, Universitätsverlag
Winter, Heidelberg, n.d., pp. 15–27.'
date_created: 2022-09-08T11:52:14Z
date_updated: 2022-09-14T13:28:23Z
department:
- _id: '1'
doi: 10.33675/ANGL/2022/2/6
editor:
- first_name: Daniela
full_name: Wawra, Daniela
last_name: Wawra
- first_name: Jonathan
full_name: Rose, Jonathan
last_name: Rose
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://angl.winter-verlag.de/article/ANGL/2022/2/6
oa: '1'
page: 15 - 27
place: Heidelberg
publication: Selected Papers from the 2021 Conference of the German Association for
the Study of English
publication_identifier:
eissn:
- 2625-2147
publication_status: inpress
publisher: Universitätsverlag Winter
series_title: Anglistik
status: public
title: Authentic Englishes.nrw – Developing and Using Interactive Teaching and Learning
Materials on Varieties of English
type: book_chapter
user_id: '29061'
volume: '33.2'
year: '2022'
...
---
_id: '33371'
article_type: original
author:
- first_name: Isabel
full_name: Steinhardt, Isabel
id: '90339'
last_name: Steinhardt
orcid: https://orcid.org/0000-0002-2590-6189
citation:
ama: Steinhardt I. Kollaborative Autoethnographien digitaler Praktiken. Eine konzeptionelle,
methodische und theoretische Einführung zu einem Lehr-Forschungsprojekt im ersten
Corona-Semester. DNGPS Working Paper. 2022;8(si):1-11. doi:10.3224/dngps.v8si.01
apa: Steinhardt, I. (2022). Kollaborative Autoethnographien digitaler Praktiken.
Eine konzeptionelle, methodische und theoretische Einführung zu einem Lehr-Forschungsprojekt
im ersten Corona-Semester. DNGPS Working Paper, 8(si), 1–11. https://doi.org/10.3224/dngps.v8si.01
bibtex: '@article{Steinhardt_2022, title={Kollaborative Autoethnographien digitaler
Praktiken. Eine konzeptionelle, methodische und theoretische Einführung zu einem
Lehr-Forschungsprojekt im ersten Corona-Semester}, volume={8}, DOI={10.3224/dngps.v8si.01},
number={si}, journal={DNGPS Working Paper}, publisher={Verlag Barbara Budrich
GmbH}, author={Steinhardt, Isabel}, year={2022}, pages={1–11} }'
chicago: 'Steinhardt, Isabel. “Kollaborative Autoethnographien digitaler Praktiken.
Eine konzeptionelle, methodische und theoretische Einführung zu einem Lehr-Forschungsprojekt
im ersten Corona-Semester.” DNGPS Working Paper 8, no. si (2022): 1–11.
https://doi.org/10.3224/dngps.v8si.01.'
ieee: 'I. Steinhardt, “Kollaborative Autoethnographien digitaler Praktiken. Eine
konzeptionelle, methodische und theoretische Einführung zu einem Lehr-Forschungsprojekt
im ersten Corona-Semester,” DNGPS Working Paper, vol. 8, no. si, pp. 1–11,
2022, doi: 10.3224/dngps.v8si.01.'
mla: Steinhardt, Isabel. “Kollaborative Autoethnographien digitaler Praktiken. Eine
konzeptionelle, methodische und theoretische Einführung zu einem Lehr-Forschungsprojekt
im ersten Corona-Semester.” DNGPS Working Paper, vol. 8, no. si, Verlag
Barbara Budrich GmbH, 2022, pp. 1–11, doi:10.3224/dngps.v8si.01.
short: I. Steinhardt, DNGPS Working Paper 8 (2022) 1–11.
date_created: 2022-09-15T08:03:19Z
date_updated: 2022-09-15T08:34:45Z
ddc:
- '300'
department:
- _id: '121'
doi: 10.3224/dngps.v8si.01
file:
- access_level: closed
content_type: application/pdf
creator: isste
date_created: 2022-09-15T08:33:30Z
date_updated: 2022-09-15T08:33:30Z
file_id: '33374'
file_name: 2022 Steinhardt Kollaborative Autoethnographie DNGPS.pdf
file_size: 177005
relation: main_file
success: 1
file_date_updated: 2022-09-15T08:33:30Z
has_accepted_license: '1'
intvolume: ' 8'
issue: si
keyword:
- Open Science
- kollaborative Autoethnographie
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://www.budrich-journals.de/index.php/dngps/article/view/39212/33438
oa: '1'
page: 1-11
publication: DNGPS Working Paper
publication_identifier:
issn:
- 2365-3329
publication_status: published
publisher: Verlag Barbara Budrich GmbH
status: public
title: Kollaborative Autoethnographien digitaler Praktiken. Eine konzeptionelle, methodische
und theoretische Einführung zu einem Lehr-Forschungsprojekt im ersten Corona-Semester
type: journal_article
user_id: '90339'
volume: 8
year: '2022'
...
---
_id: '33370'
abstract:
- lang: eng
text: Research that investigates respective researchers’ engagement in Open
Science varies widely in the topics addressed, methods employed, and disciplines
investigated, which makes it difficult to integrate and compare its results. To
investigate current outcomes of Open Science research, and to get a better understanding
on well-researched topics and research gaps, we aimed at providing an openly accessible
overview of empirical studies that focus on different aspects of Open Science
in different scientific disciplines, academic groups and geographical regions.
In this paper, we describe a data set of studies about Open Science practices
retrieved following a PRISMA approach to compile a literature review. We included
studies from the Scopus and Web of Science databases with keywords relating to
Open Science between the years 2000 and 2020, as well as a snowball search for
relevant articles. Studies that did not investigate any aspect of Open Science,
or weren’t peer-reviewed were excluded, resulting in a total of 695 remaining
studies. The data set was collaboratively annotated to
ensure intercoder reliability of the coded data.
article_number: '535'
article_type: original
author:
- first_name: Jana
full_name: Lasser, Jana
last_name: Lasser
- first_name: Jürgen
full_name: Schneider, Jürgen
last_name: Schneider
- first_name: Thomas
full_name: Lösch, Thomas
last_name: Lösch
- first_name: Ronny
full_name: Röwert, Ronny
last_name: Röwert
- first_name: Tamara
full_name: Heck, Tamara
last_name: Heck
- first_name: Clemens
full_name: Bluemel, Clemens
last_name: Bluemel
- first_name: Maike
full_name: Neufend, Maike
last_name: Neufend
- first_name: Isabel
full_name: Steinhardt, Isabel
id: '90339'
last_name: Steinhardt
orcid: https://orcid.org/0000-0002-2590-6189
- first_name: Stefan
full_name: Skupien, Stefan
last_name: Skupien
citation:
ama: Lasser J, Schneider J, Lösch T, et al. MapOSR - A mapping review dataset of
empirical studies on Open Science. F1000Research. 2022;11. doi:10.12688/f1000research.121665.1
apa: Lasser, J., Schneider, J., Lösch, T., Röwert, R., Heck, T., Bluemel, C., Neufend,
M., Steinhardt, I., & Skupien, S. (2022). MapOSR - A mapping review dataset
of empirical studies on Open Science. F1000Research, 11, Article
535. https://doi.org/10.12688/f1000research.121665.1
bibtex: '@article{Lasser_Schneider_Lösch_Röwert_Heck_Bluemel_Neufend_Steinhardt_Skupien_2022,
title={MapOSR - A mapping review dataset of empirical studies on Open Science},
volume={11}, DOI={10.12688/f1000research.121665.1},
number={535}, journal={F1000Research}, publisher={F1000 Research Ltd}, author={Lasser,
Jana and Schneider, Jürgen and Lösch, Thomas and Röwert, Ronny and Heck, Tamara
and Bluemel, Clemens and Neufend, Maike and Steinhardt, Isabel and Skupien, Stefan},
year={2022} }'
chicago: Lasser, Jana, Jürgen Schneider, Thomas Lösch, Ronny Röwert, Tamara Heck,
Clemens Bluemel, Maike Neufend, Isabel Steinhardt, and Stefan Skupien. “MapOSR
- A Mapping Review Dataset of Empirical Studies on Open Science.” F1000Research
11 (2022). https://doi.org/10.12688/f1000research.121665.1.
ieee: 'J. Lasser et al., “MapOSR - A mapping review dataset of empirical
studies on Open Science,” F1000Research, vol. 11, Art. no. 535, 2022, doi:
10.12688/f1000research.121665.1.'
mla: Lasser, Jana, et al. “MapOSR - A Mapping Review Dataset of Empirical Studies
on Open Science.” F1000Research, vol. 11, 535, F1000 Research Ltd, 2022,
doi:10.12688/f1000research.121665.1.
short: J. Lasser, J. Schneider, T. Lösch, R. Röwert, T. Heck, C. Bluemel, M. Neufend,
I. Steinhardt, S. Skupien, F1000Research 11 (2022).
date_created: 2022-09-15T08:00:49Z
date_updated: 2022-09-15T08:31:55Z
doi: 10.12688/f1000research.121665.1
intvolume: ' 11'
keyword:
- Open Science
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://f1000research.com/articles/11-535
oa: '1'
publication: F1000Research
publication_identifier:
issn:
- 2046-1402
publication_status: published
publisher: F1000 Research Ltd
quality_controlled: '1'
status: public
title: MapOSR - A mapping review dataset of empirical studies on Open Science
type: journal_article
user_id: '90339'
volume: 11
year: '2022'
...
---
_id: '33377'
abstract:
- lang: ger
text: 'Zur Inhaltsanalyse gibt es bereits diverse Methodenbücher. Warum sollten
Sie also genau das vorliegende Methodenbuch „Qualitative und quantitative Inhaltsanalyse:
digital und automatisiert “lesen? Erstens schließt dieses Buch eine Lücke, der
wir in der Lehre und bei Methodenworkshops immer wieder begegnet sind. Diese Lücke
besteht darin, dass selten eine Übersicht über und Gegenüberstellung verschiedener
Methoden der qualitativen und quantitativen Inhaltsanalyse gegeben wird. Zudem
haben bisherige Lehr-und Methodenbücher in den Sozialwissenschaften teil-und vollautomatisierte
Verfahren der Textanalyse noch nicht aufgegriffen und diese mit bereits etablierten
Verfahren qualitativer und quantitativer Inhaltsanalyse verknüpft. Zweitens bietet
dieses Buch im ersten Teil eine systematische und anwendungsorientierte Einführung
zu den Grundlagen inhaltsanalytischer empirischer Sozialforschung. Im zweiten
Teil werden detaillierte Anleitungen von digital unterstützten qualitativen inhaltsanalytischen
Auswertungstechniken gegeben. Den teil-und vollautomatisierten quantitativen inhaltsanalytischen
Auswertungstechniken widmet sich der dritte Teil des Buches. Bei digital unterstützten
Verfahren werden Sie durch Software bei Ihrer Analyse unterstützt, beispielsweise
bei der digitalen Organisation Ihrer Daten und bei der digitalen Durchführung
der Auswertung. Bei teilautomatisierten Verfahren der Inhaltsanalyse nehmen Ihnen
Software und Tools Teile der Datenanalyse ab, wohingegen bei vollautomatisierten
Verfahren der gesamte Auswertungsprozess und oftmals auch die Datenbeschaffung
durch Programme und Tools durchgeführt wird.'
author:
- first_name: Christian
full_name: Schneijderberg, Christian
last_name: Schneijderberg
- first_name: Oliver
full_name: Wieczorek, Oliver
last_name: Wieczorek
- first_name: Isabel
full_name: Steinhardt, Isabel
id: '90339'
last_name: Steinhardt
orcid: https://orcid.org/0000-0002-2590-6189
citation:
ama: 'Schneijderberg C, Wieczorek O, Steinhardt I. Qualitative und quantitative
Inhaltsanalyse: digital und automatisiert. Eine anwendungsorientierte Einführung
mit empirischen Beispielen und Softwareanwendungen. Beltz Juventa; 2022.'
apa: 'Schneijderberg, C., Wieczorek, O., & Steinhardt, I. (2022). Qualitative
und quantitative Inhaltsanalyse: digital und automatisiert. Eine anwendungsorientierte
Einführung mit empirischen Beispielen und Softwareanwendungen. Beltz Juventa.'
bibtex: '@book{Schneijderberg_Wieczorek_Steinhardt_2022, place={Weinheim, Basel},
series={Standards standardisierter und nichtstandardisierter Sozialforschung},
title={Qualitative und quantitative Inhaltsanalyse: digital und automatisiert.
Eine anwendungsorientierte Einführung mit empirischen Beispielen und Softwareanwendungen},
publisher={Beltz Juventa}, author={Schneijderberg, Christian and Wieczorek, Oliver
and Steinhardt, Isabel}, year={2022}, collection={Standards standardisierter und
nichtstandardisierter Sozialforschung} }'
chicago: 'Schneijderberg, Christian, Oliver Wieczorek, and Isabel Steinhardt. Qualitative
und quantitative Inhaltsanalyse: digital und automatisiert. Eine anwendungsorientierte
Einführung mit empirischen Beispielen und Softwareanwendungen. Standards standardisierter
und nichtstandardisierter Sozialforschung. Weinheim, Basel: Beltz Juventa, 2022.'
ieee: 'C. Schneijderberg, O. Wieczorek, and I. Steinhardt, Qualitative und quantitative
Inhaltsanalyse: digital und automatisiert. Eine anwendungsorientierte Einführung
mit empirischen Beispielen und Softwareanwendungen. Weinheim, Basel: Beltz
Juventa, 2022.'
mla: 'Schneijderberg, Christian, et al. Qualitative und quantitative Inhaltsanalyse:
digital und automatisiert. Eine anwendungsorientierte Einführung mit empirischen
Beispielen und Softwareanwendungen. Beltz Juventa, 2022.'
short: 'C. Schneijderberg, O. Wieczorek, I. Steinhardt, Qualitative und quantitative
Inhaltsanalyse: digital und automatisiert. Eine anwendungsorientierte Einführung
mit empirischen Beispielen und Softwareanwendungen, Beltz Juventa, Weinheim, Basel,
2022.'
date_created: 2022-09-15T08:46:45Z
date_updated: 2022-09-15T08:46:51Z
ddc:
- '300'
file:
- access_level: closed
content_type: application/pdf
creator: isste
date_created: 2022-09-15T08:44:04Z
date_updated: 2022-09-15T08:44:04Z
file_id: '33378'
file_name: 2022 Schneijderberg_ua_quali-quanti Inhaltsanalyse.pdf
file_size: 11413008
relation: main_file
success: 1
file_date_updated: 2022-09-15T08:44:04Z
has_accepted_license: '1'
keyword:
- qualitative Inhaltsanalyse
- quantitative Inhaltsanalyse
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://www.beltz.de/fachmedien/erziehungswissenschaft/produkte/details/48826-qualitative-und-quantitative-inhaltsanalyse-digital-und-automatisiert.html
oa: '1'
place: Weinheim, Basel
publication_identifier:
eisbn:
- 978-3-7799-7037-8 E
publication_status: published
publisher: Beltz Juventa
series_title: Standards standardisierter und nichtstandardisierter Sozialforschung
status: public
title: 'Qualitative und quantitative Inhaltsanalyse: digital und automatisiert. Eine
anwendungsorientierte Einführung mit empirischen Beispielen und Softwareanwendungen'
type: book
user_id: '90339'
year: '2022'
...
---
_id: '33381'
article_type: original
author:
- first_name: Lisa
full_name: Scheiwe, Lisa
id: '33408'
last_name: Scheiwe
citation:
ama: Scheiwe L. Evaluating Accents of English in ELT Textbooks Used at German Secondary
Schools. Anglistik. 2022;33(2):61-75. doi:https://doi.org/10.33675/ANGL/2022/2/8
apa: Scheiwe, L. (2022). Evaluating Accents of English in ELT Textbooks Used at
German Secondary Schools. Anglistik, 33(2), 61–75. https://doi.org/10.33675/ANGL/2022/2/8
bibtex: '@article{Scheiwe_2022, title={Evaluating Accents of English in ELT Textbooks
Used at German Secondary Schools}, volume={33}, DOI={https://doi.org/10.33675/ANGL/2022/2/8},
number={2}, journal={Anglistik}, author={Scheiwe, Lisa}, year={2022}, pages={61–75}
}'
chicago: 'Scheiwe, Lisa. “Evaluating Accents of English in ELT Textbooks Used at
German Secondary Schools.” Anglistik 33, no. 2 (2022): 61–75. https://doi.org/10.33675/ANGL/2022/2/8.'
ieee: 'L. Scheiwe, “Evaluating Accents of English in ELT Textbooks Used at German
Secondary Schools,” Anglistik, vol. 33, no. 2, pp. 61–75, 2022, doi: https://doi.org/10.33675/ANGL/2022/2/8.'
mla: Scheiwe, Lisa. “Evaluating Accents of English in ELT Textbooks Used at German
Secondary Schools.” Anglistik, vol. 33, no. 2, 2022, pp. 61–75, doi:https://doi.org/10.33675/ANGL/2022/2/8.
short: L. Scheiwe, Anglistik 33 (2022) 61–75.
date_created: 2022-09-15T09:08:25Z
date_updated: 2022-09-15T09:10:10Z
doi: https://doi.org/10.33675/ANGL/2022/2/8
intvolume: ' 33'
issue: '2'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://angl.winter-verlag.de/article/ANGL/2022/2/8
oa: '1'
page: 61-75
publication: Anglistik
publication_status: published
status: public
title: Evaluating Accents of English in ELT Textbooks Used at German Secondary Schools
type: journal_article
user_id: '33408'
volume: 33
year: '2022'
...
---
_id: '6579'
abstract:
- lang: eng
text: An explicit approach using symplectic time integration in conjunction with
traditional finite difference spatial derivatives to solve the wave equation in
moving media is presented. A simple operator split of this second order wave equation
into two coupled first order equations is performed, allowing these split equations
to be solved symplectically. Orders of symplectic time integration ranging from
first to fourth along with orders of spatial derivatives ranging from second to
sixth are explored. The case of cylindrical acoustic spreading in air under a
constant velocity in a 2D square structured domain is considered. The variation
of the computed time-of-flight, frequency, and wave length are studied with varying
grid resolution and the deviations from the analytical solutions are determined.
It was found that symplectic time integration interferes with finite difference
spatial derivatives higher than second order causing unexpected results. This
is actually beneficial for unstructured finite volume tools like OpenFOAM where
second order spatial operators are the state-of-the art. Cylindrical acoustic
spreading is simulated on an unstructured 2D triangle mesh showing that symplectic
time integration is not limited to the spatial discretization paradigm and overcomes
the numerical diffusion arising with the in-built numerical methods which hinder
wave propagation.
article_number: e12573
article_type: original
author:
- first_name: Venkatesh
full_name: Inguva, Venkatesh
id: '75069'
last_name: Inguva
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Taras
full_name: Koturbash, Taras
last_name: Koturbash
- first_name: Thomas
full_name: Hahn-Jose, Thomas
last_name: Hahn-Jose
- first_name: Vladimir
full_name: Koutcherov, Vladimir
last_name: Koutcherov
- first_name: Eugeny
full_name: Kenig, Eugeny
id: '665'
last_name: Kenig
citation:
ama: Inguva V, Feldmann N, Claes L, et al. An explicit symplectic approach to solving
the wave equation in moving media. Engineering Reports. Published online
2022. doi:10.1002/eng2.12573
apa: Inguva, V., Feldmann, N., Claes, L., Koturbash, T., Hahn-Jose, T., Koutcherov,
V., & Kenig, E. (2022). An explicit symplectic approach to solving the wave
equation in moving media. Engineering Reports, Article e12573. https://doi.org/10.1002/eng2.12573
bibtex: '@article{Inguva_Feldmann_Claes_Koturbash_Hahn-Jose_Koutcherov_Kenig_2022,
title={An explicit symplectic approach to solving the wave equation in moving
media}, DOI={10.1002/eng2.12573},
number={e12573}, journal={Engineering Reports}, author={Inguva, Venkatesh and
Feldmann, Nadine and Claes, Leander and Koturbash, Taras and Hahn-Jose, Thomas
and Koutcherov, Vladimir and Kenig, Eugeny}, year={2022} }'
chicago: Inguva, Venkatesh, Nadine Feldmann, Leander Claes, Taras Koturbash, Thomas
Hahn-Jose, Vladimir Koutcherov, and Eugeny Kenig. “An Explicit Symplectic Approach
to Solving the Wave Equation in Moving Media.” Engineering Reports, 2022.
https://doi.org/10.1002/eng2.12573.
ieee: 'V. Inguva et al., “An explicit symplectic approach to solving the
wave equation in moving media,” Engineering Reports, Art. no. e12573, 2022,
doi: 10.1002/eng2.12573.'
mla: Inguva, Venkatesh, et al. “An Explicit Symplectic Approach to Solving the Wave
Equation in Moving Media.” Engineering Reports, e12573, 2022, doi:10.1002/eng2.12573.
short: V. Inguva, N. Feldmann, L. Claes, T. Koturbash, T. Hahn-Jose, V. Koutcherov,
E. Kenig, Engineering Reports (2022).
date_created: 2019-01-09T14:37:29Z
date_updated: 2022-09-19T06:59:57Z
department:
- _id: '145'
- _id: '49'
doi: 10.1002/eng2.12573
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://onlinelibrary.wiley.com/doi/abs/10.1002/eng2.12573
oa: '1'
publication: Engineering Reports
status: public
title: An explicit symplectic approach to solving the wave equation in moving media
type: journal_article
user_id: '11829'
year: '2022'
...
---
_id: '33523'
abstract:
- lang: ger
text: Die thermisch verursachte, plastische Verformung an statischen Druckplatten
von Lamellenbremsen kann das Betriebsverhalten von Bremsen nachhaltig stören und
sollte daher vermieden werden. So kann die plastische Verformung der Druckplatte
beispielsweise zu einer Verkleinerung des Luftspalts führen und ungewollte Veränderung
der Reibverhältnisse verursachen. Während des Bremsvorgangs dehnen sich hoch erwärmte
Bereiche nah der Reibfläche aus und werden von den Zonen geringerer Temperatur
an ihrer Ausdehnung gehindert. Überschreiten die daraus resultierenden Spannungen
die Dehngrenze des Materials, kommt es zu plastischer Verformung. Dieser Artikel
erläutert den physikalischen Verformungsprozess detailliert und darauf aufbauend,
welche Maßnahmen zu einer Verringerung der Verformung ergriffen werden können.
Dazu werden im Rahmen theoretischer Vorüberlegungen drei Ansätze identifiziert,
die sowohl die Geometrie als auch die Werkstoffe der Druckplatten betreffen. Radiale
Schlitze sollen die Behinderung der thermischen Dehnung verhindern und dadurch
Spannungen reduzieren; die Werkstoffauswahl auf Basis der Thermoschockempfindlichkeit
reduziert die plastische Verformung. Anhand einer kombinierten Simulation der
Thermik und der Mechanik einer Druckplatte wird der Effekt dieser Ansätze an vier
Varianten der Druckplatte überprüft. Experimentelle Untersuchungen an realen Prototypen
der Druckplattenvarianten bestätigen die Ergebnisse der Simulation und weisen
die Wirksamkeit der vorgeschlagenen Maßnahmen zur Reduzierung der plastischen
Verformung nach.
article_type: original
author:
- first_name: Magnus
full_name: Schadomsky, Magnus
id: '11904'
last_name: Schadomsky
- first_name: Lars Martin
full_name: Blumenthal, Lars Martin
id: '27566'
last_name: Blumenthal
- first_name: Detmar
full_name: Zimmer, Detmar
id: '604'
last_name: Zimmer
- first_name: Simon
full_name: Peter, Simon
last_name: Peter
- first_name: Laszlo
full_name: Boros, Laszlo
last_name: Boros
citation:
ama: Schadomsky M, Blumenthal LM, Zimmer D, Peter S, Boros L. Maßnahmen zur Reduzierung
von plastischer Verformung an statischen Druckplatten von Lammellenbremsen infolge
einseitig eingebrachter hoher Reibleistung. Forschung im Ingenieurwesen.
Published online 2022. doi:10.1007/s10010-022-00601-2
apa: Schadomsky, M., Blumenthal, L. M., Zimmer, D., Peter, S., & Boros, L. (2022).
Maßnahmen zur Reduzierung von plastischer Verformung an statischen Druckplatten
von Lammellenbremsen infolge einseitig eingebrachter hoher Reibleistung. Forschung
im Ingenieurwesen. https://doi.org/10.1007/s10010-022-00601-2
bibtex: '@article{Schadomsky_Blumenthal_Zimmer_Peter_Boros_2022, title={Maßnahmen
zur Reduzierung von plastischer Verformung an statischen Druckplatten von Lammellenbremsen
infolge einseitig eingebrachter hoher Reibleistung}, DOI={10.1007/s10010-022-00601-2},
journal={Forschung im Ingenieurwesen}, publisher={Springer Science and Business
Media LLC}, author={Schadomsky, Magnus and Blumenthal, Lars Martin and Zimmer,
Detmar and Peter, Simon and Boros, Laszlo}, year={2022} }'
chicago: Schadomsky, Magnus, Lars Martin Blumenthal, Detmar Zimmer, Simon Peter,
and Laszlo Boros. “Maßnahmen zur Reduzierung von plastischer Verformung an statischen
Druckplatten von Lammellenbremsen infolge einseitig eingebrachter hoher Reibleistung.”
Forschung im Ingenieurwesen, 2022. https://doi.org/10.1007/s10010-022-00601-2.
ieee: 'M. Schadomsky, L. M. Blumenthal, D. Zimmer, S. Peter, and L. Boros, “Maßnahmen
zur Reduzierung von plastischer Verformung an statischen Druckplatten von Lammellenbremsen
infolge einseitig eingebrachter hoher Reibleistung,” Forschung im Ingenieurwesen,
2022, doi: 10.1007/s10010-022-00601-2.'
mla: Schadomsky, Magnus, et al. “Maßnahmen zur Reduzierung von plastischer Verformung
an statischen Druckplatten von Lammellenbremsen infolge einseitig eingebrachter
hoher Reibleistung.” Forschung im Ingenieurwesen, Springer Science and
Business Media LLC, 2022, doi:10.1007/s10010-022-00601-2.
short: M. Schadomsky, L.M. Blumenthal, D. Zimmer, S. Peter, L. Boros, Forschung
im Ingenieurwesen (2022).
date_created: 2022-10-05T13:54:14Z
date_updated: 2022-10-05T14:09:05Z
department:
- _id: '146'
doi: 10.1007/s10010-022-00601-2
keyword:
- General Engineering
- Bremsen
- Bremsscheiben
- thermoplastische Verformung
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://rdcu.be/cWonK
oa: '1'
publication: Forschung im Ingenieurwesen
publication_identifier:
issn:
- 0015-7899
- 1434-0860
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Maßnahmen zur Reduzierung von plastischer Verformung an statischen Druckplatten
von Lammellenbremsen infolge einseitig eingebrachter hoher Reibleistung
type: journal_article
user_id: '11904'
year: '2022'
...
---
_id: '33810'
article_type: original
author:
- first_name: Christian
full_name: Koldewey, Christian
id: '43136'
last_name: Koldewey
orcid: https://orcid.org/0000-0001-7992-6399
- first_name: Daniela
full_name: Hobscheidt, Daniela
last_name: Hobscheidt
- first_name: Christoph
full_name: Pierenkemper, Christoph
last_name: Pierenkemper
- first_name: Arno
full_name: Kühn, Arno
last_name: Kühn
- first_name: Roman
full_name: Dumitrescu, Roman
id: '16190'
last_name: Dumitrescu
citation:
ama: Koldewey C, Hobscheidt D, Pierenkemper C, Kühn A, Dumitrescu R. Increasing
Firm Performance through Industry 4.0—A Method to Define and Reach Meaningful
Goals. Sci. 2022;39(4). doi:https://doi.org/10.3390/sci4040039
apa: Koldewey, C., Hobscheidt, D., Pierenkemper, C., Kühn, A., & Dumitrescu,
R. (2022). Increasing Firm Performance through Industry 4.0—A Method to Define
and Reach Meaningful Goals. Sci, 39(4). https://doi.org/10.3390/sci4040039
bibtex: '@article{Koldewey_Hobscheidt_Pierenkemper_Kühn_Dumitrescu_2022, title={Increasing
Firm Performance through Industry 4.0—A Method to Define and Reach Meaningful
Goals}, volume={39}, DOI={https://doi.org/10.3390/sci4040039},
number={4}, journal={Sci}, publisher={MDPI}, author={Koldewey, Christian and Hobscheidt,
Daniela and Pierenkemper, Christoph and Kühn, Arno and Dumitrescu, Roman}, year={2022}
}'
chicago: Koldewey, Christian, Daniela Hobscheidt, Christoph Pierenkemper, Arno Kühn,
and Roman Dumitrescu. “Increasing Firm Performance through Industry 4.0—A Method
to Define and Reach Meaningful Goals.” Sci 39, no. 4 (2022). https://doi.org/10.3390/sci4040039.
ieee: 'C. Koldewey, D. Hobscheidt, C. Pierenkemper, A. Kühn, and R. Dumitrescu,
“Increasing Firm Performance through Industry 4.0—A Method to Define and Reach
Meaningful Goals,” Sci, vol. 39, no. 4, 2022, doi: https://doi.org/10.3390/sci4040039.'
mla: Koldewey, Christian, et al. “Increasing Firm Performance through Industry 4.0—A
Method to Define and Reach Meaningful Goals.” Sci, vol. 39, no. 4, MDPI,
2022, doi:https://doi.org/10.3390/sci4040039.
short: C. Koldewey, D. Hobscheidt, C. Pierenkemper, A. Kühn, R. Dumitrescu, Sci
39 (2022).
date_created: 2022-10-18T09:59:59Z
date_updated: 2022-10-19T12:29:26Z
department:
- _id: '563'
doi: https://doi.org/10.3390/sci4040039
intvolume: ' 39'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2413-4155/4/4/39/pdf?version=1666082435
oa: '1'
publication: Sci
publication_status: published
publisher: MDPI
quality_controlled: '1'
status: public
title: Increasing Firm Performance through Industry 4.0—A Method to Define and Reach
Meaningful Goals
type: journal_article
user_id: '15782'
volume: 39
year: '2022'
...
---
_id: '20731'
abstract:
- lang: eng
text: We present a novel algorithm that allows us to gain detailed insight into
the effects of sparsity in linear and nonlinear optimization, which is of great
importance in many scientific areas such as image and signal processing, medical
imaging, compressed sensing, and machine learning (e.g., for the training of neural
networks). Sparsity is an important feature to ensure robustness against noisy
data, but also to find models that are interpretable and easy to analyze due to
the small number of relevant terms. It is common practice to enforce sparsity
by adding the ℓ1-norm as a weighted penalty term. In order to gain a better understanding
and to allow for an informed model selection, we directly solve the corresponding
multiobjective optimization problem (MOP) that arises when we minimize the main
objective and the ℓ1-norm simultaneously. As this MOP is in general non-convex
for nonlinear objectives, the weighting method will fail to provide all optimal
compromises. To avoid this issue, we present a continuation method which is specifically
tailored to MOPs with two objective functions one of which is the ℓ1-norm. Our
method can be seen as a generalization of well-known homotopy methods for linear
regression problems to the nonlinear case. Several numerical examples - including
neural network training - demonstrate our theoretical findings and the additional
insight that can be gained by this multiobjective approach.
article_type: original
author:
- first_name: Katharina
full_name: Bieker, Katharina
id: '32829'
last_name: Bieker
- first_name: Bennet
full_name: Gebken, Bennet
id: '32643'
last_name: Gebken
- first_name: Sebastian
full_name: Peitz, Sebastian
id: '47427'
last_name: Peitz
orcid: 0000-0002-3389-793X
citation:
ama: Bieker K, Gebken B, Peitz S. On the Treatment of Optimization Problems with
L1 Penalty Terms via Multiobjective Continuation. IEEE Transactions on Pattern
Analysis and Machine Intelligence. 2022;44(11):7797-7808. doi:10.1109/TPAMI.2021.3114962
apa: Bieker, K., Gebken, B., & Peitz, S. (2022). On the Treatment of Optimization
Problems with L1 Penalty Terms via Multiobjective Continuation. IEEE Transactions
on Pattern Analysis and Machine Intelligence, 44(11), 7797–7808. https://doi.org/10.1109/TPAMI.2021.3114962
bibtex: '@article{Bieker_Gebken_Peitz_2022, title={On the Treatment of Optimization
Problems with L1 Penalty Terms via Multiobjective Continuation}, volume={44},
DOI={10.1109/TPAMI.2021.3114962},
number={11}, journal={IEEE Transactions on Pattern Analysis and Machine Intelligence},
publisher={IEEE}, author={Bieker, Katharina and Gebken, Bennet and Peitz, Sebastian},
year={2022}, pages={7797–7808} }'
chicago: 'Bieker, Katharina, Bennet Gebken, and Sebastian Peitz. “On the Treatment
of Optimization Problems with L1 Penalty Terms via Multiobjective Continuation.”
IEEE Transactions on Pattern Analysis and Machine Intelligence 44, no.
11 (2022): 7797–7808. https://doi.org/10.1109/TPAMI.2021.3114962.'
ieee: 'K. Bieker, B. Gebken, and S. Peitz, “On the Treatment of Optimization Problems
with L1 Penalty Terms via Multiobjective Continuation,” IEEE Transactions on
Pattern Analysis and Machine Intelligence, vol. 44, no. 11, pp. 7797–7808,
2022, doi: 10.1109/TPAMI.2021.3114962.'
mla: Bieker, Katharina, et al. “On the Treatment of Optimization Problems with L1
Penalty Terms via Multiobjective Continuation.” IEEE Transactions on Pattern
Analysis and Machine Intelligence, vol. 44, no. 11, IEEE, 2022, pp. 7797–808,
doi:10.1109/TPAMI.2021.3114962.
short: K. Bieker, B. Gebken, S. Peitz, IEEE Transactions on Pattern Analysis and
Machine Intelligence 44 (2022) 7797–7808.
date_created: 2020-12-15T07:46:36Z
date_updated: 2022-10-21T12:27:16Z
ddc:
- '510'
department:
- _id: '101'
- _id: '530'
- _id: '655'
doi: 10.1109/TPAMI.2021.3114962
file:
- access_level: closed
content_type: application/pdf
creator: speitz
date_created: 2021-09-25T11:59:15Z
date_updated: 2021-09-25T11:59:15Z
file_id: '25040'
file_name: On_the_Treatment_of_Optimization_Problems_with_L1_Penalty_Terms_via_Multiobjective_Continuation.pdf
file_size: 7990831
relation: main_file
success: 1
file_date_updated: 2021-09-25T11:59:15Z
has_accepted_license: '1'
intvolume: ' 44'
issue: '11'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9547772
oa: '1'
page: 7797-7808
publication: IEEE Transactions on Pattern Analysis and Machine Intelligence
publication_status: epub_ahead
publisher: IEEE
status: public
title: On the Treatment of Optimization Problems with L1 Penalty Terms via Multiobjective
Continuation
type: journal_article
user_id: '47427'
volume: 44
year: '2022'
...
---
_id: '34015'
author:
- first_name: Ingrid
full_name: Scharlau, Ingrid
id: '451'
last_name: Scharlau
orcid: 0000-0003-2364-9489
citation:
ama: 'Scharlau I. Hundertstelmillimeter. In: Haacke-Werron S, Karsten A, Scharlau
I, eds. Reflexive Schreibwissenschaft. Vol 14. Theorie und Praxis der Schreibwissenschaft.
WBV; 2022:147-152. doi:10.3278/9783763972524'
apa: Scharlau, I. (2022). Hundertstelmillimeter. In S. Haacke-Werron, A. Karsten,
& I. Scharlau (Eds.), Reflexive Schreibwissenschaft (Vol. 14, pp. 147–152).
WBV. https://doi.org/10.3278/9783763972524
bibtex: '@inbook{Scharlau_2022, place={Bielefeld}, series={Theorie und Praxis der
Schreibwissenschaft}, title={Hundertstelmillimeter}, volume={14}, DOI={10.3278/9783763972524},
booktitle={Reflexive Schreibwissenschaft}, publisher={WBV}, author={Scharlau,
Ingrid}, editor={Haacke-Werron, Stefanie and Karsten, Andrea and Scharlau, Ingrid},
year={2022}, pages={147–152}, collection={Theorie und Praxis der Schreibwissenschaft}
}'
chicago: 'Scharlau, Ingrid. “Hundertstelmillimeter.” In Reflexive Schreibwissenschaft,
edited by Stefanie Haacke-Werron, Andrea Karsten, and Ingrid Scharlau, 14:147–52.
Theorie und Praxis der Schreibwissenschaft. Bielefeld: WBV, 2022. https://doi.org/10.3278/9783763972524.'
ieee: 'I. Scharlau, “Hundertstelmillimeter,” in Reflexive Schreibwissenschaft,
vol. 14, S. Haacke-Werron, A. Karsten, and I. Scharlau, Eds. Bielefeld: WBV, 2022,
pp. 147–152.'
mla: Scharlau, Ingrid. “Hundertstelmillimeter.” Reflexive Schreibwissenschaft,
edited by Stefanie Haacke-Werron et al., vol. 14, WBV, 2022, pp. 147–52, doi:10.3278/9783763972524.
short: 'I. Scharlau, in: S. Haacke-Werron, A. Karsten, I. Scharlau (Eds.), Reflexive
Schreibwissenschaft, WBV, Bielefeld, 2022, pp. 147–152.'
date_created: 2022-11-04T13:51:26Z
date_updated: 2022-11-04T13:51:31Z
department:
- _id: '424'
doi: 10.3278/9783763972524
editor:
- first_name: Stefanie
full_name: Haacke-Werron, Stefanie
last_name: Haacke-Werron
- first_name: Andrea
full_name: Karsten, Andrea
last_name: Karsten
- first_name: Ingrid
full_name: Scharlau, Ingrid
last_name: Scharlau
intvolume: ' 14'
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://www.wbv.de/shop/geistes-und-sozialwissenschaften/schreibwissenschaft/shop/detail/name/_/0/1/I72524/facet/I72524///////nb/0/category/1743.html
oa: '1'
page: 147-152
place: Bielefeld
publication: Reflexive Schreibwissenschaft
publication_identifier:
unknown:
- '9783763972517'
- '9783763972524'
publication_status: published
publisher: WBV
series_title: Theorie und Praxis der Schreibwissenschaft
status: public
title: Hundertstelmillimeter
type: book_chapter
user_id: '451'
volume: 14
year: '2022'
...
---
_id: '34253'
abstract:
- lang: eng
text: "Lightweight construction has increasingly become the focus of scientific
research in recent years, not least due to\r\nthe constantly increasing fuel price,
which is a key factor in the economic viability of many companies. In this\r\nrespect,
the use of hybrid structures, made of dissimilar materials offers many advantages.
However, such hybrid\r\nstructures often have undesirable side effects. For example,
brittle intermetallic phases are formed when\r\naluminum and steel are welded.
Clinching as a mechanical joining process does not produce such intermetallic\r\nphases
since the connection is realized through form and force closure. In this process,
a punch passes through\r\ntwo or more sheets and forms them into a permanent joint
in a die. In the present work, the corrosion phenomena\r\nof an aluminum-steel
clinched joint have been investigated by both experiments and numerical simulations
in\r\norder to explain the superior fatigue behavior of pre-corroded joints. Therefore,
the clinched joints have been\r\ncorroded by a three-week salt-spray test. In
addition, the electric potential and the von Mises stress are calculated\r\nunder
the assumption of a static loading. The results of both experiments and numerical
simulations can explain\r\nthe improvement in the fatigue behavior of the corroded
specimens. This phenomenon can be attributed to the\r\naccumulation of corrosion
products in small gaps between the joined metal sheets."
article_number: '100130'
author:
- first_name: Sven
full_name: Harzheim, Sven
last_name: Harzheim
- first_name: Lars
full_name: Ewenz, Lars
last_name: Ewenz
- first_name: Martina
full_name: Zimmermann, Martina
last_name: Zimmermann
- first_name: Thomas
full_name: Wallmersperger, Thomas
last_name: Wallmersperger
citation:
ama: 'Harzheim S, Ewenz L, Zimmermann M, Wallmersperger T. Corrosion Phenomena and
Fatigue Behavior of Clinched Joints: Numerical and Experimental Investigations.
Journal of Advanced Joining Processes. 2022;6. doi:10.1016/j.jajp.2022.100130'
apa: 'Harzheim, S., Ewenz, L., Zimmermann, M., & Wallmersperger, T. (2022).
Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental
Investigations. Journal of Advanced Joining Processes, 6, Article
100130. https://doi.org/10.1016/j.jajp.2022.100130'
bibtex: '@article{Harzheim_Ewenz_Zimmermann_Wallmersperger_2022, title={Corrosion
Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental
Investigations}, volume={6}, DOI={10.1016/j.jajp.2022.100130},
number={100130}, journal={Journal of Advanced Joining Processes}, publisher={Elsevier
BV}, author={Harzheim, Sven and Ewenz, Lars and Zimmermann, Martina and Wallmersperger,
Thomas}, year={2022} }'
chicago: 'Harzheim, Sven, Lars Ewenz, Martina Zimmermann, and Thomas Wallmersperger.
“Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and Experimental
Investigations.” Journal of Advanced Joining Processes 6 (2022). https://doi.org/10.1016/j.jajp.2022.100130.'
ieee: 'S. Harzheim, L. Ewenz, M. Zimmermann, and T. Wallmersperger, “Corrosion Phenomena
and Fatigue Behavior of Clinched Joints: Numerical and Experimental Investigations,”
Journal of Advanced Joining Processes, vol. 6, Art. no. 100130, 2022, doi:
10.1016/j.jajp.2022.100130.'
mla: 'Harzheim, Sven, et al. “Corrosion Phenomena and Fatigue Behavior of Clinched
Joints: Numerical and Experimental Investigations.” Journal of Advanced Joining
Processes, vol. 6, 100130, Elsevier BV, 2022, doi:10.1016/j.jajp.2022.100130.'
short: S. Harzheim, L. Ewenz, M. Zimmermann, T. Wallmersperger, Journal of Advanced
Joining Processes 6 (2022).
date_created: 2022-12-06T19:29:59Z
date_updated: 2023-01-02T11:04:06Z
department:
- _id: '630'
doi: 10.1016/j.jajp.2022.100130
intvolume: ' 6'
keyword:
- Mechanical Engineering
- Mechanics of Materials
- Engineering (miscellaneous)
- Chemical Engineering (miscellaneous)
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S2666330922000346?via%3Dihub
oa: '1'
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '132'
name: 'TRR 285 - B: TRR 285 - Project Area B'
- _id: '141'
name: 'TRR 285 – B02: TRR 285 - Subproject B02'
- _id: '142'
name: 'TRR 285 – B03: TRR 285 - Subproject B03'
publication: Journal of Advanced Joining Processes
publication_identifier:
issn:
- 2666-3309
publication_status: published
publisher: Elsevier BV
status: public
title: 'Corrosion Phenomena and Fatigue Behavior of Clinched Joints: Numerical and
Experimental Investigations'
type: journal_article
user_id: '14931'
volume: 6
year: '2022'
...
---
_id: '34252'
abstract:
- lang: eng
text: Clinching is the manufacturing process of joining two or more metal sheets
under high plastic deformation by form and force closure without thermal support
and auxiliary parts. Clinch connections are applicable to difficult-to-join hybrid
material combinations, such as steel and aluminum. Therefore, this technology
is interesting for the application of AISI 304 components, as this material is
widely used as a highly formable sheet material. A characteristic feature of AISI
304 is its metastability, i.e., the face-centered cubic (fcc) γ-austenite can
transform into a significantly stronger body-centered cubic (bcc) α’-martensite
under plastic deformation. This work investigates the effect of heat treatment—a
process that involves the formation of an oxidation layer on the sheet surface—on
the forming process during joining and the resulting mechanical properties of
clinch joints made from AISI 304. For this purpose, different joints made from
non-heat treated and heat-treated sheets were examined using classical metallography
and advanced SEM techniques, accompanied by further investigations, such as hardness
and feritscope measurements. The shear tensile strength was determined, and the
fracture behavior of the samples was investigated. Clear influences of heat-treatment-induced
surface roughness on the joint geometry and strength were observed.
article_number: '1514'
author:
- first_name: André Till
full_name: Zeuner, André Till
last_name: Zeuner
- first_name: Lars
full_name: Ewenz, Lars
last_name: Ewenz
- first_name: Jan
full_name: Kalich, Jan
last_name: Kalich
- first_name: Sebastian
full_name: Schöne, Sebastian
last_name: Schöne
- first_name: Uwe
full_name: Füssel, Uwe
last_name: Füssel
- first_name: Martina
full_name: Zimmermann, Martina
last_name: Zimmermann
citation:
ama: Zeuner AT, Ewenz L, Kalich J, Schöne S, Füssel U, Zimmermann M. The Influence
of Heat Treatment on the Microstructure, Surface Roughness and Shear Tensile Strength
of AISI 304 Clinch Joints. Metals. 2022;12(9). doi:10.3390/met12091514
apa: Zeuner, A. T., Ewenz, L., Kalich, J., Schöne, S., Füssel, U., & Zimmermann,
M. (2022). The Influence of Heat Treatment on the Microstructure, Surface Roughness
and Shear Tensile Strength of AISI 304 Clinch Joints. Metals, 12(9),
Article 1514. https://doi.org/10.3390/met12091514
bibtex: '@article{Zeuner_Ewenz_Kalich_Schöne_Füssel_Zimmermann_2022, title={The
Influence of Heat Treatment on the Microstructure, Surface Roughness and Shear
Tensile Strength of AISI 304 Clinch Joints}, volume={12}, DOI={10.3390/met12091514},
number={91514}, journal={Metals}, publisher={MDPI AG}, author={Zeuner, André Till
and Ewenz, Lars and Kalich, Jan and Schöne, Sebastian and Füssel, Uwe and Zimmermann,
Martina}, year={2022} }'
chicago: Zeuner, André Till, Lars Ewenz, Jan Kalich, Sebastian Schöne, Uwe Füssel,
and Martina Zimmermann. “The Influence of Heat Treatment on the Microstructure,
Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints.” Metals
12, no. 9 (2022). https://doi.org/10.3390/met12091514.
ieee: 'A. T. Zeuner, L. Ewenz, J. Kalich, S. Schöne, U. Füssel, and M. Zimmermann,
“The Influence of Heat Treatment on the Microstructure, Surface Roughness and
Shear Tensile Strength of AISI 304 Clinch Joints,” Metals, vol. 12, no.
9, Art. no. 1514, 2022, doi: 10.3390/met12091514.'
mla: Zeuner, André Till, et al. “The Influence of Heat Treatment on the Microstructure,
Surface Roughness and Shear Tensile Strength of AISI 304 Clinch Joints.” Metals,
vol. 12, no. 9, 1514, MDPI AG, 2022, doi:10.3390/met12091514.
short: A.T. Zeuner, L. Ewenz, J. Kalich, S. Schöne, U. Füssel, M. Zimmermann, Metals
12 (2022).
date_created: 2022-12-06T19:25:49Z
date_updated: 2023-01-02T11:04:26Z
department:
- _id: '630'
doi: 10.3390/met12091514
intvolume: ' 12'
issue: '9'
keyword:
- General Materials Science
- Metals and Alloys
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2075-4701/12/9/1514
oa: '1'
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '138'
name: 'TRR 285 – A04: TRR 285 - Subproject A04'
- _id: '132'
name: 'TRR 285 - B: TRR 285 - Project Area B'
- _id: '141'
name: 'TRR 285 – B02: TRR 285 - Subproject B02'
publication: Metals
publication_identifier:
issn:
- 2075-4701
publication_status: published
publisher: MDPI AG
status: public
title: The Influence of Heat Treatment on the Microstructure, Surface Roughness and
Shear Tensile Strength of AISI 304 Clinch Joints
type: journal_article
user_id: '14931'
volume: 12
year: '2022'
...