---
_id: '21183'
abstract:
- lang: ger
text: Die präzise Kenntnis der Eigenschaften verwendeter Materialien hat große Bedeutung
für den Entwurf technischer Systeme aller Art, aber auch für die Überwachung solcher
Systeme im Betrieb. Für verschiedene physikalische Eigenschaften, Betriebsbedingungen
und Materialklassen werden daher geeignete messtechnische Verfahren zur Materialcharakterisierung
benötigt. In der vorliegenden Arbeit wird ein Verfahren zur ultraschallbasierten
Charakterisierung der mechanischen Eigenschaften von homogenen und faserverstärkten
thermoplastischen Polymeren unter Berücksichtigung der Richtungsabhängigkeit vorgestellt.
Plattenförmige Probekörper werden dazu mittels Laser-Pulsen hoher Energie breitbandig
angeregt und die resultierenden akustischen Lamb-Wellen aufgezeichnet. Auf Basis
der dispersiven Eigenschaften der detektierten Wellenleitermoden werden in einem
inversen Verfahren die Parameter eines linear-elastischen Materialmodells identifiziert.
Darüber hinaus wird ein Verfahren zur vollständigen Charakterisierung der Richtungsabhängigkeit
in orthotropen Materialien wie Faserverbundwerkstoffen unter Verwendung eines
zweidimensionalen Simulationsmodells vorgestellt. Das Messverfahren wird anhand
einer Untersuchungsreihe an künstlich gealterten Polymer- und Faserverbundwerkstoffen
verifiziert und die Übertragbarkeit der Ergebnisse auf den quasistatischen Fall
betrachtet. Im Vergleich mit den Ergebnissen mechanischer Zugversuche werden die
Voraussetzungen und Einschränkungen, insbesondere durch die Annahme eines ideal-elastischen
Materialmodells, diskutiert.
- lang: eng
text: Precise knowledge of material properties is a great concern in the design
of technical systems, and in the monitoring of such systems during operation.
Therefore, metrological processes are required for materials characterisation
with respect to specific physical properties, operational conditions and classes
of materials. In the work presented herein, a measurement procedure for the ultrasonic
characterization of mechanical properties of homogeneous and fiber-reinforced
thermoplastic polymer materials is presented, considering the different degrees
of anisotropy. For this, acoustic Lamb waves are excited in a plate-shaped specimen
using high-energy laser pulses, and then recorded.Based on the dispersive characteristics
of the detected waveguide modes, an inverse procedure is applied to identify the
parameters of a linear-elastic material model. Further, a procedure for completely
characterising the orthotropy of materials like fiber-reinforced composites using
a two-dimensional simulation model is presented. The measurement procedure is
verified by examining artificially aged homogeneous polymers and composites, also
considering the applicability of results to the quasistatic case. Comparing to
the results of corresponding mechanical tensile tests, preconditions and limitations
of the procedure are discussed, specifically regarding the assumption of an ideal-elastic
material model.
author:
- first_name: Manuel
full_name: Webersen, Manuel
id: '11289'
last_name: Webersen
orcid: 0000-0001-6411-4232
citation:
ama: Webersen M. Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften
thermoplastischer Polymerwerkstoffe mittels Ultraschall. Universitätsbibliothek
Paderborn; 2021. doi:10.17619/UNIPB/1-1088
apa: Webersen, M. (2021). Zerstörungsfreie Charakterisierung der elastischen
Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall.
Universitätsbibliothek Paderborn. https://doi.org/10.17619/UNIPB/1-1088
bibtex: '@book{Webersen_2021, title={Zerstörungsfreie Charakterisierung der elastischen
Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall},
DOI={10.17619/UNIPB/1-1088},
publisher={Universitätsbibliothek Paderborn}, author={Webersen, Manuel}, year={2021}
}'
chicago: Webersen, Manuel. Zerstörungsfreie Charakterisierung der elastischen
Materialeigenschaften thermoplastischer Polymerwerkstoffe mittels Ultraschall.
Universitätsbibliothek Paderborn, 2021. https://doi.org/10.17619/UNIPB/1-1088.
ieee: M. Webersen, Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften
thermoplastischer Polymerwerkstoffe mittels Ultraschall. Universitätsbibliothek
Paderborn, 2021.
mla: Webersen, Manuel. Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften
thermoplastischer Polymerwerkstoffe mittels Ultraschall. Universitätsbibliothek
Paderborn, 2021, doi:10.17619/UNIPB/1-1088.
short: M. Webersen, Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften
thermoplastischer Polymerwerkstoffe mittels Ultraschall, Universitätsbibliothek
Paderborn, 2021.
date_created: 2021-02-05T11:47:28Z
date_updated: 2022-01-06T06:54:49Z
department:
- _id: '49'
doi: 10.17619/UNIPB/1-1088
language:
- iso: ger
publication_status: published
publisher: Universitätsbibliothek Paderborn
status: public
title: Zerstörungsfreie Charakterisierung der elastischen Materialeigenschaften thermoplastischer
Polymerwerkstoffe mittels Ultraschall
type: dissertation
user_id: '11289'
year: '2021'
...
---
_id: '21264'
abstract:
- lang: eng
text: |-
Abstract
Background
Hand amputation can have a truly debilitating impact on the life of the affected person. A multifunctional myoelectric prosthesis controlled using pattern classification can be used to restore some of the lost motor abilities. However, learning to control an advanced prosthesis can be a challenging task, but virtual and augmented reality (AR) provide means to create an engaging and motivating training.
Methods
In this study, we present a novel training framework that integrates virtual elements within a real scene (AR) while allowing the view from the first-person perspective. The framework was evaluated in 13 able-bodied subjects and a limb-deficient person divided into intervention (IG) and control (CG) groups. The IG received training by performing simulated clothespin task and both groups conducted a pre- and posttest with a real prosthesis. When training with the AR, the subjects received visual feedback on the generated grasping force. The main outcome measure was the number of pins that were successfully transferred within 20 min (task duration), while the number of dropped and broken pins were also registered. The participants were asked to score the difficulty of the real task (posttest), fun-factor and motivation, as well as the utility of the feedback.
Results
The performance (median/interquartile range) consistently increased during the training sessions (4/3 to 22/4). While the results were similar for the two groups in the pretest, the performance improved in the posttest only in IG. In addition, the subjects in IG transferred significantly more pins (28/10.5 versus 14.5/11), and dropped (1/2.5 versus 3.5/2) and broke (5/3.8 versus 14.5/9) significantly fewer pins in the posttest compared to CG. The participants in IG assigned (mean ± std) significantly lower scores to the difficulty compared to CG (5.2 ± 1.9 versus 7.1 ± 0.9), and they highly rated the fun factor (8.7 ± 1.3) and usefulness of feedback (8.5 ± 1.7).
Conclusion
The results demonstrated that the proposed AR system allows for the transfer of skills from the simulated to the real task while providing a positive user experience. The present study demonstrates the effectiveness and flexibility of the proposed AR framework. Importantly, the developed system is open source and available for download and further development.
author:
- first_name: Alexander
full_name: Boschmann, Alexander
last_name: Boschmann
- first_name: Dorothee
full_name: Neuhaus, Dorothee
last_name: Neuhaus
- first_name: Sarah
full_name: Vogt, Sarah
last_name: Vogt
- first_name: Christian
full_name: Kaltschmidt, Christian
last_name: Kaltschmidt
- first_name: Marco
full_name: Platzner, Marco
last_name: Platzner
- first_name: Strahinja
full_name: Dosen, Strahinja
last_name: Dosen
citation:
ama: Boschmann A, Neuhaus D, Vogt S, Kaltschmidt C, Platzner M, Dosen S. Immersive
augmented reality system for the training of pattern classification control with
a myoelectric prosthesis. Journal of NeuroEngineering and Rehabilitation.
2021. doi:10.1186/s12984-021-00822-6
apa: Boschmann, A., Neuhaus, D., Vogt, S., Kaltschmidt, C., Platzner, M., &
Dosen, S. (2021). Immersive augmented reality system for the training of pattern
classification control with a myoelectric prosthesis. Journal of NeuroEngineering
and Rehabilitation. https://doi.org/10.1186/s12984-021-00822-6
bibtex: '@article{Boschmann_Neuhaus_Vogt_Kaltschmidt_Platzner_Dosen_2021, title={Immersive
augmented reality system for the training of pattern classification control with
a myoelectric prosthesis}, DOI={10.1186/s12984-021-00822-6},
journal={Journal of NeuroEngineering and Rehabilitation}, author={Boschmann, Alexander
and Neuhaus, Dorothee and Vogt, Sarah and Kaltschmidt, Christian and Platzner,
Marco and Dosen, Strahinja}, year={2021} }'
chicago: Boschmann, Alexander, Dorothee Neuhaus, Sarah Vogt, Christian Kaltschmidt,
Marco Platzner, and Strahinja Dosen. “Immersive Augmented Reality System for the
Training of Pattern Classification Control with a Myoelectric Prosthesis.” Journal
of NeuroEngineering and Rehabilitation, 2021. https://doi.org/10.1186/s12984-021-00822-6.
ieee: A. Boschmann, D. Neuhaus, S. Vogt, C. Kaltschmidt, M. Platzner, and S. Dosen,
“Immersive augmented reality system for the training of pattern classification
control with a myoelectric prosthesis,” Journal of NeuroEngineering and Rehabilitation,
2021.
mla: Boschmann, Alexander, et al. “Immersive Augmented Reality System for the Training
of Pattern Classification Control with a Myoelectric Prosthesis.” Journal of
NeuroEngineering and Rehabilitation, 2021, doi:10.1186/s12984-021-00822-6.
short: A. Boschmann, D. Neuhaus, S. Vogt, C. Kaltschmidt, M. Platzner, S. Dosen,
Journal of NeuroEngineering and Rehabilitation (2021).
date_created: 2021-02-22T10:43:02Z
date_updated: 2022-01-06T06:54:52Z
doi: 10.1186/s12984-021-00822-6
language:
- iso: eng
publication: Journal of NeuroEngineering and Rehabilitation
publication_identifier:
issn:
- 1743-0003
publication_status: published
status: public
title: Immersive augmented reality system for the training of pattern classification
control with a myoelectric prosthesis
type: journal_article
user_id: '35756'
year: '2021'
...
---
_id: '21564'
author:
- first_name: Dominik
full_name: Itner, Dominik
last_name: Itner
- first_name: Hauke
full_name: Gravenkamp, Hauke
last_name: Gravenkamp
- first_name: Dmitrij
full_name: Dreiling, Dmitrij
id: '32616'
last_name: Dreiling
- first_name: Nadine
full_name: Feldmann, Nadine
id: '23082'
last_name: Feldmann
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Itner D, Gravenkamp H, Dreiling D, Feldmann N, Henning B. On the Forward
Simulation and Cost Functions for the Ultrasonic Material Characterization of
Polymers . GAMM Annual Meeting, Kassel; 2021.
apa: Itner, D., Gravenkamp, H., Dreiling, D., Feldmann, N., & Henning, B. (2021).
On the forward simulation and cost functions for the ultrasonic material characterization
of polymers . GAMM Annual Meeting, Kassel.
bibtex: '@book{Itner_Gravenkamp_Dreiling_Feldmann_Henning_2021, place={GAMM Annual
Meeting, Kassel}, title={On the forward simulation and cost functions for the
ultrasonic material characterization of polymers }, author={Itner, Dominik and
Gravenkamp, Hauke and Dreiling, Dmitrij and Feldmann, Nadine and Henning, Bernd},
year={2021} }'
chicago: Itner, Dominik, Hauke Gravenkamp, Dmitrij Dreiling, Nadine Feldmann, and
Bernd Henning. On the Forward Simulation and Cost Functions for the Ultrasonic
Material Characterization of Polymers . GAMM Annual Meeting, Kassel, 2021.
ieee: D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, and B. Henning, On the
forward simulation and cost functions for the ultrasonic material characterization
of polymers . GAMM Annual Meeting, Kassel, 2021.
mla: Itner, Dominik, et al. On the Forward Simulation and Cost Functions for
the Ultrasonic Material Characterization of Polymers . 2021.
short: D. Itner, H. Gravenkamp, D. Dreiling, N. Feldmann, B. Henning, On the Forward
Simulation and Cost Functions for the Ultrasonic Material Characterization of
Polymers , GAMM Annual Meeting, Kassel, 2021.
date_created: 2021-03-24T13:37:38Z
date_updated: 2022-01-06T06:55:06Z
department:
- _id: '49'
language:
- iso: eng
place: GAMM Annual Meeting, Kassel
project:
- _id: '89'
grant_number: '409779252'
name: Vollständige Bestimmung der akustischen Materialparameter von Polymeren
status: public
title: 'On the forward simulation and cost functions for the ultrasonic material characterization
of polymers '
type: misc
user_id: '11829'
year: '2021'
...
---
_id: '23612'
author:
- first_name: Yong
full_name: Zhang, Yong
last_name: Zhang
- first_name: Nicholas H. C.
full_name: Lewis, Nicholas H. C.
last_name: Lewis
- first_name: Julian
full_name: Mars, Julian
last_name: Mars
- first_name: Gang
full_name: Wan, Gang
last_name: Wan
- first_name: Nicholas J.
full_name: Weadock, Nicholas J.
last_name: Weadock
- first_name: Christopher J.
full_name: Takacs, Christopher J.
last_name: Takacs
- first_name: Maria R.
full_name: Lukatskaya, Maria R.
last_name: Lukatskaya
- first_name: Hans-Georg
full_name: Steinrück, Hans-Georg
id: '84268'
last_name: Steinrück
orcid: 0000-0001-6373-0877
- first_name: Michael F.
full_name: Toney, Michael F.
last_name: Toney
- first_name: Andrei
full_name: Tokmakoff, Andrei
last_name: Tokmakoff
- first_name: Edward J.
full_name: Maginn, Edward J.
last_name: Maginn
citation:
ama: Zhang Y, Lewis NHC, Mars J, et al. Water-in-Salt LiTFSI Aqueous Electrolytes.
1. Liquid Structure from Combined Molecular Dynamics Simulation and Experimental
Studies. The Journal of Physical Chemistry B. 2021;125:4501-4513. doi:10.1021/acs.jpcb.1c02189
apa: Zhang, Y., Lewis, N. H. C., Mars, J., Wan, G., Weadock, N. J., Takacs, C. J.,
Lukatskaya, M. R., Steinrück, H.-G., Toney, M. F., Tokmakoff, A., & Maginn,
E. J. (2021). Water-in-Salt LiTFSI Aqueous Electrolytes. 1. Liquid Structure from
Combined Molecular Dynamics Simulation and Experimental Studies. The Journal
of Physical Chemistry B, 125, 4501–4513. https://doi.org/10.1021/acs.jpcb.1c02189
bibtex: '@article{Zhang_Lewis_Mars_Wan_Weadock_Takacs_Lukatskaya_Steinrück_Toney_Tokmakoff_et
al._2021, title={Water-in-Salt LiTFSI Aqueous Electrolytes. 1. Liquid Structure
from Combined Molecular Dynamics Simulation and Experimental Studies}, volume={125},
DOI={10.1021/acs.jpcb.1c02189},
journal={The Journal of Physical Chemistry B}, author={Zhang, Yong and Lewis,
Nicholas H. C. and Mars, Julian and Wan, Gang and Weadock, Nicholas J. and Takacs,
Christopher J. and Lukatskaya, Maria R. and Steinrück, Hans-Georg and Toney, Michael
F. and Tokmakoff, Andrei and et al.}, year={2021}, pages={4501–4513} }'
chicago: 'Zhang, Yong, Nicholas H. C. Lewis, Julian Mars, Gang Wan, Nicholas J.
Weadock, Christopher J. Takacs, Maria R. Lukatskaya, et al. “Water-in-Salt LiTFSI
Aqueous Electrolytes. 1. Liquid Structure from Combined Molecular Dynamics Simulation
and Experimental Studies.” The Journal of Physical Chemistry B 125 (2021):
4501–13. https://doi.org/10.1021/acs.jpcb.1c02189.'
ieee: 'Y. Zhang et al., “Water-in-Salt LiTFSI Aqueous Electrolytes. 1. Liquid
Structure from Combined Molecular Dynamics Simulation and Experimental Studies,”
The Journal of Physical Chemistry B, vol. 125, pp. 4501–4513, 2021, doi:
10.1021/acs.jpcb.1c02189.'
mla: Zhang, Yong, et al. “Water-in-Salt LiTFSI Aqueous Electrolytes. 1. Liquid Structure
from Combined Molecular Dynamics Simulation and Experimental Studies.” The
Journal of Physical Chemistry B, vol. 125, 2021, pp. 4501–13, doi:10.1021/acs.jpcb.1c02189.
short: Y. Zhang, N.H.C. Lewis, J. Mars, G. Wan, N.J. Weadock, C.J. Takacs, M.R.
Lukatskaya, H.-G. Steinrück, M.F. Toney, A. Tokmakoff, E.J. Maginn, The Journal
of Physical Chemistry B 125 (2021) 4501–4513.
date_created: 2021-09-01T09:09:26Z
date_updated: 2022-01-06T06:55:57Z
department:
- _id: '633'
doi: 10.1021/acs.jpcb.1c02189
intvolume: ' 125'
language:
- iso: eng
page: 4501-4513
publication: The Journal of Physical Chemistry B
publication_identifier:
issn:
- 1520-6106
- 1520-5207
publication_status: published
status: public
title: Water-in-Salt LiTFSI Aqueous Electrolytes. 1. Liquid Structure from Combined
Molecular Dynamics Simulation and Experimental Studies
type: journal_article
user_id: '84268'
volume: 125
year: '2021'
...
---
_id: '22206'
abstract:
- lang: eng
text: AbstractWe consider tracking control for
multibody systems which are modeled using holonomic and non-holonomic constraints.
Furthermore, the systems may be underactuated and contain kinematic loops and
are thus described by a set of differential-algebraic equations that cannot be
reformulated as ordinary differential equations in general. We propose a control
strategy which combines a feedforward controller based on the servo-constraints
approach with a feedback controller based on a recent funnel control design. As
an important tool for both approaches, we present a new procedure to derive the
internal dynamics of a multibody system. Furthermore, we present a feasible set
of coordinates for the internal dynamics avoiding the effort involved with the
computation of the Byrnes–Isidori form. The control design is demonstrated by
a simulation for a nonlinear non-minimum phase multi-input, multi-output robotic
manipulator with kinematic loop.
author:
- first_name: Thomas
full_name: Berger, Thomas
last_name: Berger
- first_name: Svenja
full_name: Drücker, Svenja
last_name: Drücker
- first_name: Lukas Johannes
full_name: Lanza, Lukas Johannes
id: '78640'
last_name: Lanza
- first_name: Timo
full_name: Reis, Timo
last_name: Reis
- first_name: Robert
full_name: Seifried, Robert
last_name: Seifried
citation:
ama: Berger T, Drücker S, Lanza LJ, Reis T, Seifried R. Tracking control for underactuated
non-minimum phase multibody systems. Nonlinear Dynamics. 2021. doi:10.1007/s11071-021-06458-4
apa: Berger, T., Drücker, S., Lanza, L. J., Reis, T., & Seifried, R. (2021).
Tracking control for underactuated non-minimum phase multibody systems. Nonlinear
Dynamics. https://doi.org/10.1007/s11071-021-06458-4
bibtex: '@article{Berger_Drücker_Lanza_Reis_Seifried_2021, title={Tracking control
for underactuated non-minimum phase multibody systems}, DOI={10.1007/s11071-021-06458-4},
journal={Nonlinear Dynamics}, author={Berger, Thomas and Drücker, Svenja and Lanza,
Lukas Johannes and Reis, Timo and Seifried, Robert}, year={2021} }'
chicago: Berger, Thomas, Svenja Drücker, Lukas Johannes Lanza, Timo Reis, and Robert
Seifried. “Tracking Control for Underactuated Non-Minimum Phase Multibody Systems.”
Nonlinear Dynamics, 2021. https://doi.org/10.1007/s11071-021-06458-4.
ieee: T. Berger, S. Drücker, L. J. Lanza, T. Reis, and R. Seifried, “Tracking control
for underactuated non-minimum phase multibody systems,” Nonlinear Dynamics,
2021.
mla: Berger, Thomas, et al. “Tracking Control for Underactuated Non-Minimum Phase
Multibody Systems.” Nonlinear Dynamics, 2021, doi:10.1007/s11071-021-06458-4.
short: T. Berger, S. Drücker, L.J. Lanza, T. Reis, R. Seifried, Nonlinear Dynamics
(2021).
date_created: 2021-05-17T05:24:00Z
date_updated: 2022-01-06T06:55:29Z
doi: 10.1007/s11071-021-06458-4
language:
- iso: eng
publication: Nonlinear Dynamics
publication_identifier:
issn:
- 0924-090X
- 1573-269X
publication_status: published
status: public
title: Tracking control for underactuated non-minimum phase multibody systems
type: journal_article
user_id: '78640'
year: '2021'
...
---
_id: '22460'
author:
- first_name: Mike
full_name: Bothe, Mike
id: '72973'
last_name: Bothe
- first_name: Nicole
full_name: Lutters, Nicole
id: '22006'
last_name: Lutters
- first_name: Eugeny
full_name: Kenig, Eugeny
id: '665'
last_name: Kenig
citation:
ama: 'Bothe M, Lutters N, Kenig E. Dynamische Simulation von Gefahrensituationen
bei industriellen Kreislaufprozessen am Beispiel der chemischen Absorption. In:
Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme- und
Stoffübertragung; 2021.'
apa: Bothe, M., Lutters, N., & Kenig, E. (2021). Dynamische Simulation von
Gefahrensituationen bei industriellen Kreislaufprozessen am Beispiel der chemischen
Absorption. Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik
und Wärme- und Stoffübertragung, online-Konferenz (Leipzig).
bibtex: '@inproceedings{Bothe_Lutters_Kenig_2021, place={online (Leipzig)}, title={Dynamische
Simulation von Gefahrensituationen bei industriellen Kreislaufprozessen am Beispiel
der chemischen Absorption}, publisher={Jahrestreffen der ProcessNet-Fachgruppen
Fluidverfahrenstechnik und Wärme- und Stoffübertragung}, author={Bothe, Mike and
Lutters, Nicole and Kenig, Eugeny}, year={2021} }'
chicago: 'Bothe, Mike, Nicole Lutters, and Eugeny Kenig. “Dynamische Simulation
von Gefahrensituationen Bei Industriellen Kreislaufprozessen Am Beispiel Der Chemischen
Absorption.” online (Leipzig): Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik
und Wärme- und Stoffübertragung, 2021.'
ieee: M. Bothe, N. Lutters, and E. Kenig, “Dynamische Simulation von Gefahrensituationen
bei industriellen Kreislaufprozessen am Beispiel der chemischen Absorption,” presented
at the Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme-
und Stoffübertragung, online-Konferenz (Leipzig), 2021.
mla: Bothe, Mike, et al. Dynamische Simulation von Gefahrensituationen Bei Industriellen
Kreislaufprozessen Am Beispiel Der Chemischen Absorption. Jahrestreffen der
ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme- und Stoffübertragung,
2021.
short: 'M. Bothe, N. Lutters, E. Kenig, in: Jahrestreffen der ProcessNet-Fachgruppen
Fluidverfahrenstechnik und Wärme- und Stoffübertragung, online (Leipzig), 2021.'
conference:
end_date: 2021-02-26
location: online-Konferenz (Leipzig)
name: Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme-
und Stoffübertragung
start_date: 2021-02-24
date_created: 2021-06-17T08:01:25Z
date_updated: 2022-01-06T06:55:33Z
department:
- _id: '9'
- _id: '145'
language:
- iso: eng
place: online (Leipzig)
publisher: Jahrestreffen der ProcessNet-Fachgruppen Fluidverfahrenstechnik und Wärme-
und Stoffübertragung
status: public
title: Dynamische Simulation von Gefahrensituationen bei industriellen Kreislaufprozessen
am Beispiel der chemischen Absorption
type: conference_abstract
user_id: '22006'
year: '2021'
...
---
_id: '22511'
abstract:
- lang: eng
text: "In this paper, we reconsider the well-known discrete, round-based Go-To-The-Center
algorithm due to Ando, Suzuki, and Yamashita [2] for gathering n autonomous mobile
robots with limited viewing range in the plane. Remarquably, this algorithm exploits
the fact that during its execution, many collisions of robots occur. Such collisions
are interpreted as a success because it is assumed that such collided robots behave
the same from now on. This is acceptable under the assumption that each robot
is represented by a single point. Otherwise, collisions should be avoided. In
this paper, we consider a continuous Go-To-The-Center algorithm in which the robots
continuously observe the positions of their neighbors and adapt their speed (assuming
a speed limit) and direction. Our first results are time bounds of O(n2) for gathering
in two dimensions Euclidean space, and Θ(n) for the one dimension. Our main contribution
is the introduction and evaluation of a continuous algorithm which performs Go-To-The-Center
considering only the neighbors of a robot with respect to the Gabriel subgraph
of the visibility graph, i.e. Go-To-The-Gabriel-Center algorithm. We show that
this modification still correctly executes gathering in one and two dimensions,
with the same time bounds as above. Simulations exhibit a severe difference of
the behavior of the Go-To-The-Center and the Go-To-The-Gabriel-Center algorithms:
Whereas lots of collisions occur during a run of the Go-To-The-Center algorithm,
typically only one, namely the final collision occurs during a run of the Go-To-The-Gabriel-Center
algorithm. We can prove this “collisionless property” of the Go-To-The-Gabriel-Center
algorithm for one dimension. In two-dimensional Euclidean space, we conjecture
that the “collisionless property” holds for almost every initial configuration.
We support our conjecture with measurements obtained from the simulation where
robots execute both continuous Go-To-The-Center and Go-To-The-Gabriel-Center algorithms.\r\n"
author:
- first_name: Shouwei
full_name: Li, Shouwei
last_name: Li
- first_name: Friedhelm
full_name: Meyer auf der Heide, Friedhelm
id: '15523'
last_name: Meyer auf der Heide
- first_name: Pavel
full_name: Podlipyan, Pavel
last_name: Podlipyan
citation:
ama: Li S, Meyer auf der Heide F, Podlipyan P. The impact of the Gabriel subgraph
of the visibility graph on the gathering of mobile autonomous robots. Theoretical
Computer Science. 2021;852:29-40. doi:10.1016/j.tcs.2020.11.009
apa: Li, S., Meyer auf der Heide, F., & Podlipyan, P. (2021). The impact of
the Gabriel subgraph of the visibility graph on the gathering of mobile autonomous
robots. Theoretical Computer Science, 852, 29–40. https://doi.org/10.1016/j.tcs.2020.11.009
bibtex: '@article{Li_Meyer auf der Heide_Podlipyan_2021, title={The impact of the
Gabriel subgraph of the visibility graph on the gathering of mobile autonomous
robots}, volume={852}, DOI={10.1016/j.tcs.2020.11.009},
journal={Theoretical Computer Science}, author={Li, Shouwei and Meyer auf der
Heide, Friedhelm and Podlipyan, Pavel}, year={2021}, pages={29–40} }'
chicago: 'Li, Shouwei, Friedhelm Meyer auf der Heide, and Pavel Podlipyan. “The
Impact of the Gabriel Subgraph of the Visibility Graph on the Gathering of Mobile
Autonomous Robots.” Theoretical Computer Science 852 (2021): 29–40. https://doi.org/10.1016/j.tcs.2020.11.009.'
ieee: S. Li, F. Meyer auf der Heide, and P. Podlipyan, “The impact of the Gabriel
subgraph of the visibility graph on the gathering of mobile autonomous robots,”
Theoretical Computer Science, vol. 852, pp. 29–40, 2021.
mla: Li, Shouwei, et al. “The Impact of the Gabriel Subgraph of the Visibility Graph
on the Gathering of Mobile Autonomous Robots.” Theoretical Computer Science,
vol. 852, 2021, pp. 29–40, doi:10.1016/j.tcs.2020.11.009.
short: S. Li, F. Meyer auf der Heide, P. Podlipyan, Theoretical Computer Science
852 (2021) 29–40.
date_created: 2021-06-28T09:34:45Z
date_updated: 2022-01-06T06:55:35Z
department:
- _id: '63'
doi: 10.1016/j.tcs.2020.11.009
intvolume: ' 852'
keyword:
- Local algorithms
- Distributed algorithms
- Collisionless gathering
- Mobile robots
- Multiagent system
language:
- iso: eng
page: 29-40
publication: Theoretical Computer Science
publication_identifier:
issn:
- 0304-3975
publication_status: published
status: public
title: The impact of the Gabriel subgraph of the visibility graph on the gathering
of mobile autonomous robots
type: journal_article
user_id: '15415'
volume: 852
year: '2021'
...
---
_id: '22637'
abstract:
- lang: eng
text: "Abstract\r\n Doxorubicin (DOX)
is a common drug in cancer chemotherapy, and its high DNA-binding affinity can
be harnessed in preparing DOX-loaded DNA nanostructures for targeted delivery
and therapeutics. Although DOX has been widely studied, the existing literature
of DOX-loaded DNA-carriers remains limited and incoherent. Here, based on an in-depth
spectroscopic analysis, we characterize and optimize the DOX loading into different
2D and 3D scaffolded DNA origami nanostructures (DONs). In our experimental conditions,
all DONs show similar DOX binding capacities (one DOX molecule per two to three
base pairs), and the binding equilibrium is reached within seconds, remarkably
faster than previously acknowledged. To characterize drug release profiles, DON
degradation and DOX release from the complexes upon DNase I digestion was studied.
For the employed DONs, the relative doses (DOX molecules released per unit time)
may vary by two orders of magnitude depending on the DON superstructure. In addition,
we identify DOX aggregation mechanisms and spectral changes linked to pH, magnesium,
and DOX concentration. These features have been largely ignored in experimenting
with DNA nanostructures, but are probably the major sources of the incoherence
of the experimental results so far. Therefore, we believe this work can act as
a guide to tailoring the release profiles and developing better drug delivery
systems based on DNA-carriers."
author:
- first_name: Heini
full_name: Ijäs, Heini
last_name: Ijäs
- first_name: Boxuan
full_name: Shen, Boxuan
last_name: Shen
- first_name: Amelie
full_name: Heuer-Jungemann, Amelie
last_name: Heuer-Jungemann
- first_name: Adrian
full_name: Keller, Adrian
id: '48864'
last_name: Keller
orcid: 0000-0001-7139-3110
- first_name: Mauri A
full_name: Kostiainen, Mauri A
last_name: Kostiainen
- first_name: Tim
full_name: Liedl, Tim
last_name: Liedl
- first_name: Janne A
full_name: Ihalainen, Janne A
last_name: Ihalainen
- first_name: Veikko
full_name: Linko, Veikko
last_name: Linko
citation:
ama: Ijäs H, Shen B, Heuer-Jungemann A, et al. Unraveling the interaction between
doxorubicin and DNA origami nanostructures for customizable chemotherapeutic drug
release. Nucleic Acids Research. 2021;49:3048-3062. doi:10.1093/nar/gkab097
apa: Ijäs, H., Shen, B., Heuer-Jungemann, A., Keller, A., Kostiainen, M. A., Liedl,
T., … Linko, V. (2021). Unraveling the interaction between doxorubicin and DNA
origami nanostructures for customizable chemotherapeutic drug release. Nucleic
Acids Research, 49, 3048–3062. https://doi.org/10.1093/nar/gkab097
bibtex: '@article{Ijäs_Shen_Heuer-Jungemann_Keller_Kostiainen_Liedl_Ihalainen_Linko_2021,
title={Unraveling the interaction between doxorubicin and DNA origami nanostructures
for customizable chemotherapeutic drug release}, volume={49}, DOI={10.1093/nar/gkab097},
journal={Nucleic Acids Research}, author={Ijäs, Heini and Shen, Boxuan and Heuer-Jungemann,
Amelie and Keller, Adrian and Kostiainen, Mauri A and Liedl, Tim and Ihalainen,
Janne A and Linko, Veikko}, year={2021}, pages={3048–3062} }'
chicago: 'Ijäs, Heini, Boxuan Shen, Amelie Heuer-Jungemann, Adrian Keller, Mauri A
Kostiainen, Tim Liedl, Janne A Ihalainen, and Veikko Linko. “Unraveling the Interaction
between Doxorubicin and DNA Origami Nanostructures for Customizable Chemotherapeutic
Drug Release.” Nucleic Acids Research 49 (2021): 3048–62. https://doi.org/10.1093/nar/gkab097.'
ieee: H. Ijäs et al., “Unraveling the interaction between doxorubicin and
DNA origami nanostructures for customizable chemotherapeutic drug release,” Nucleic
Acids Research, vol. 49, pp. 3048–3062, 2021.
mla: Ijäs, Heini, et al. “Unraveling the Interaction between Doxorubicin and DNA
Origami Nanostructures for Customizable Chemotherapeutic Drug Release.” Nucleic
Acids Research, vol. 49, 2021, pp. 3048–62, doi:10.1093/nar/gkab097.
short: H. Ijäs, B. Shen, A. Heuer-Jungemann, A. Keller, M.A. Kostiainen, T. Liedl,
J.A. Ihalainen, V. Linko, Nucleic Acids Research 49 (2021) 3048–3062.
date_created: 2021-07-08T11:46:53Z
date_updated: 2022-01-06T06:55:37Z
department:
- _id: '302'
doi: 10.1093/nar/gkab097
intvolume: ' 49'
language:
- iso: eng
page: 3048-3062
publication: Nucleic Acids Research
publication_identifier:
issn:
- 0305-1048
- 1362-4962
publication_status: published
status: public
title: Unraveling the interaction between doxorubicin and DNA origami nanostructures
for customizable chemotherapeutic drug release
type: journal_article
user_id: '48864'
volume: 49
year: '2021'
...
---
_id: '22807'
abstract:
- lang: eng
text: "Photonic quantum technologies [1] with applications in quantum\r\ncommunication,
sensing as well as quantum simulation and computing, are on the\r\nverge of becoming
commercially available. One crucial building block are\r\ntailored nanoscale integratable
quantum light sources, matching the specific\r\nneeds of use-cases. Several different
approaches to realize solid-state quantum\r\nemitters [2] with high performance
[3] have been pursued. However, the\r\nproperties of the emitted single photons
are always defined by the individual\r\nquantum light source and despite numerous
quantum emitter tuning\r\ntechniques [4-7], scalability is still a major challenge.
Here we show an\r\nemitter-independent method to tailor and control the properties
of the single\r\nphoton emission. We demonstrate a laser-controlled down-conversion
process from\r\nan excited state of a quantum three-level system [8]. Starting
from a biexciton\r\nstate, a tunable control laser field defines a virtual state
in a stimulated\r\nprocess. From there, spontaneous emission to the ground state
leads to\r\noptically controlled single photon emission. Based on this concept,
we\r\ndemonstrate energy tuning of the single photon emission with a control laser\r\nfield.
The nature of the involved quantum states furthermore provides a unique\r\nbasis
for the future control of polarization and bandwidth, as predicted by\r\ntheory
[9,10]. Our demonstration marks an important step towards tailored\r\nsingle photon
emission from a photonic quantum system based on quantum optical\r\nprinciples."
author:
- first_name: B.
full_name: Jonas, B.
last_name: Jonas
- first_name: D.
full_name: Heinze, D.
last_name: Heinze
- first_name: E.
full_name: Schöll, E.
last_name: Schöll
- first_name: P.
full_name: Kallert, P.
last_name: Kallert
- first_name: T.
full_name: Langer, T.
last_name: Langer
- first_name: S.
full_name: Krehs, S.
last_name: Krehs
- first_name: A.
full_name: Widhalm, A.
last_name: Widhalm
- first_name: K. D.
full_name: Jöns, K. D.
last_name: Jöns
- first_name: D.
full_name: Reuter, D.
last_name: Reuter
- first_name: S.
full_name: Schumacher, S.
last_name: Schumacher
- first_name: Artur
full_name: Zrenner, Artur
id: '606'
last_name: Zrenner
orcid: 0000-0002-5190-0944
citation:
ama: Jonas B, Heinze D, Schöll E, et al. Nonlinear down-conversion in a single quantum
dot. arXiv:210512393. 2021.
apa: Jonas, B., Heinze, D., Schöll, E., Kallert, P., Langer, T., Krehs, S., … Zrenner,
A. (2021). Nonlinear down-conversion in a single quantum dot. ArXiv:2105.12393.
bibtex: '@article{Jonas_Heinze_Schöll_Kallert_Langer_Krehs_Widhalm_Jöns_Reuter_Schumacher_et
al._2021, title={Nonlinear down-conversion in a single quantum dot}, journal={arXiv:2105.12393},
author={Jonas, B. and Heinze, D. and Schöll, E. and Kallert, P. and Langer, T.
and Krehs, S. and Widhalm, A. and Jöns, K. D. and Reuter, D. and Schumacher, S.
and et al.}, year={2021} }'
chicago: Jonas, B., D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm,
et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” ArXiv:2105.12393,
2021.
ieee: B. Jonas et al., “Nonlinear down-conversion in a single quantum dot,”
arXiv:2105.12393. 2021.
mla: Jonas, B., et al. “Nonlinear Down-Conversion in a Single Quantum Dot.” ArXiv:2105.12393,
2021.
short: B. Jonas, D. Heinze, E. Schöll, P. Kallert, T. Langer, S. Krehs, A. Widhalm,
K.D. Jöns, D. Reuter, S. Schumacher, A. Zrenner, ArXiv:2105.12393 (2021).
date_created: 2021-07-25T12:45:25Z
date_updated: 2022-01-06T06:55:42Z
ddc:
- '530'
department:
- _id: '15'
- _id: '230'
file:
- access_level: closed
content_type: application/pdf
creator: zrenner
date_created: 2021-07-25T12:46:24Z
date_updated: 2021-07-25T12:46:24Z
file_id: '22808'
file_name: 2105.12393.pdf
file_size: 1786455
relation: main_file
success: 1
file_date_updated: 2021-07-25T12:46:24Z
has_accepted_license: '1'
language:
- iso: eng
publication: arXiv:2105.12393
status: public
title: Nonlinear down-conversion in a single quantum dot
type: preprint
user_id: '606'
year: '2021'
...
---
_id: '22927'
author:
- first_name: John
full_name: Derrick, John
last_name: Derrick
- first_name: Simon
full_name: Doherty, Simon
last_name: Doherty
- first_name: Brijesh
full_name: Dongol, Brijesh
last_name: Dongol
- first_name: Gerhard
full_name: Schellhorn, Gerhard
last_name: Schellhorn
- first_name: Heike
full_name: Wehrheim, Heike
id: '573'
last_name: Wehrheim
citation:
ama: 'Derrick J, Doherty S, Dongol B, Schellhorn G, Wehrheim H. On Strong Observational
Refinement and Forward Simulation. In: Proceedings of the 35th International
Symposium on Distributed Computing (DISC). Leibniz International Proceedings
in Informatics. Schloß Dagstuhl.'
apa: Derrick, J., Doherty, S., Dongol, B., Schellhorn, G., & Wehrheim, H. (n.d.).
On Strong Observational Refinement and Forward Simulation. In Proceedings of
the 35th International Symposium on Distributed Computing (DISC). Schloß Dagstuhl.
bibtex: '@inproceedings{Derrick_Doherty_Dongol_Schellhorn_Wehrheim, series={Leibniz
International Proceedings in Informatics}, title={On Strong Observational Refinement
and Forward Simulation}, booktitle={Proceedings of the 35th International Symposium
on Distributed Computing (DISC)}, publisher={Schloß Dagstuhl}, author={Derrick,
John and Doherty, Simon and Dongol, Brijesh and Schellhorn, Gerhard and Wehrheim,
Heike}, collection={Leibniz International Proceedings in Informatics} }'
chicago: Derrick, John, Simon Doherty, Brijesh Dongol, Gerhard Schellhorn, and Heike
Wehrheim. “On Strong Observational Refinement and Forward Simulation.” In Proceedings
of the 35th International Symposium on Distributed Computing (DISC). Leibniz
International Proceedings in Informatics. Schloß Dagstuhl, n.d.
ieee: J. Derrick, S. Doherty, B. Dongol, G. Schellhorn, and H. Wehrheim, “On Strong
Observational Refinement and Forward Simulation,” in Proceedings of the 35th
International Symposium on Distributed Computing (DISC).
mla: Derrick, John, et al. “On Strong Observational Refinement and Forward Simulation.”
Proceedings of the 35th International Symposium on Distributed Computing (DISC),
Schloß Dagstuhl.
short: 'J. Derrick, S. Doherty, B. Dongol, G. Schellhorn, H. Wehrheim, in: Proceedings
of the 35th International Symposium on Distributed Computing (DISC), Schloß Dagstuhl,
n.d.'
date_created: 2021-08-03T07:38:56Z
date_updated: 2022-01-06T06:55:43Z
department:
- _id: '7'
language:
- iso: eng
project:
- _id: '1'
name: SFB 901
- _id: '3'
name: SFB 901 - Project Area B
- _id: '12'
name: SFB 901 - Subproject B4
publication: Proceedings of the 35th International Symposium on Distributed Computing
(DISC)
publication_status: accepted
publisher: Schloß Dagstuhl
series_title: Leibniz International Proceedings in Informatics
status: public
title: On Strong Observational Refinement and Forward Simulation
type: conference
user_id: '477'
year: '2021'
...
---
_id: '23023'
abstract:
- lang: eng
text: DNA origami nanostructures (DONs) are promising substrates for the
single-molecule investigation of biomolecular reactions and dynamics by in situ
atomic force microscopy (AFM). For this, they are typically immobilized on mica
substrates by adding millimolar concentrations of Mg2+ ions to the sample solution,
which enable the adsorption of the negatively charged DONs at the like-charged
mica surface. These non-physiological Mg2+ concentrations, however, present a
serious limitation in such experiments as they may interfere with the reactions
and processes under investigation. Therefore, we here evaluate three approaches
to efficiently immobilize DONs at mica surfaces under essentially Mg2+-free conditions.
These approaches rely on the pre-adsorption of different multivalent cations,
i.e., Ni2+, poly-l-lysine (PLL), and spermidine (Spdn). DON adsorption is studied
in phosphate-buffered saline (PBS) and pure water. In general, Ni2+ shows the
worst performance with heavily deformed DONs. For 2D DON triangles, adsorption
at PLL- and in particular Spdn-modified mica may outperform even Mg2+-mediated
adsorption in terms of surface coverage, depending on the employed solution. For
3D six-helix bundles, less pronounced differences between the individual strategies
are observed. Our results provide some general guidance for the immobilization
of DONs at mica surfaces under Mg2+-free conditions and may aid future in situ
AFM studies.
author:
- first_name: Yang
full_name: Xin, Yang
last_name: Xin
- first_name: Amir Ardalan
full_name: Zargariantabrizi, Amir Ardalan
last_name: Zargariantabrizi
- first_name: Guido
full_name: Grundmeier, Guido
id: '194'
last_name: Grundmeier
- first_name: Adrian
full_name: Keller, Adrian
id: '48864'
last_name: Keller
orcid: 0000-0001-7139-3110
citation:
ama: Xin Y, Zargariantabrizi AA, Grundmeier G, Keller A. Magnesium-Free Immobilization
of DNA Origami Nanostructures at Mica Surfaces for Atomic Force Microscopy. Molecules.
2021;26:4798. doi:10.3390/molecules26164798
apa: Xin, Y., Zargariantabrizi, A. A., Grundmeier, G., & Keller, A. (2021).
Magnesium-Free Immobilization of DNA Origami Nanostructures at Mica Surfaces for
Atomic Force Microscopy. Molecules, 26, 4798. https://doi.org/10.3390/molecules26164798
bibtex: '@article{Xin_Zargariantabrizi_Grundmeier_Keller_2021, title={Magnesium-Free
Immobilization of DNA Origami Nanostructures at Mica Surfaces for Atomic Force
Microscopy}, volume={26}, DOI={10.3390/molecules26164798},
journal={Molecules}, author={Xin, Yang and Zargariantabrizi, Amir Ardalan and
Grundmeier, Guido and Keller, Adrian}, year={2021}, pages={4798} }'
chicago: 'Xin, Yang, Amir Ardalan Zargariantabrizi, Guido Grundmeier, and Adrian
Keller. “Magnesium-Free Immobilization of DNA Origami Nanostructures at Mica Surfaces
for Atomic Force Microscopy.” Molecules 26 (2021): 4798. https://doi.org/10.3390/molecules26164798.'
ieee: Y. Xin, A. A. Zargariantabrizi, G. Grundmeier, and A. Keller, “Magnesium-Free
Immobilization of DNA Origami Nanostructures at Mica Surfaces for Atomic Force
Microscopy,” Molecules, vol. 26, p. 4798, 2021.
mla: Xin, Yang, et al. “Magnesium-Free Immobilization of DNA Origami Nanostructures
at Mica Surfaces for Atomic Force Microscopy.” Molecules, vol. 26, 2021,
p. 4798, doi:10.3390/molecules26164798.
short: Y. Xin, A.A. Zargariantabrizi, G. Grundmeier, A. Keller, Molecules 26 (2021)
4798.
date_created: 2021-08-09T06:17:59Z
date_updated: 2022-01-06T06:55:45Z
department:
- _id: '302'
doi: 10.3390/molecules26164798
intvolume: ' 26'
language:
- iso: eng
page: '4798'
publication: Molecules
publication_identifier:
issn:
- 1420-3049
publication_status: published
status: public
title: Magnesium-Free Immobilization of DNA Origami Nanostructures at Mica Surfaces
for Atomic Force Microscopy
type: journal_article
user_id: '48864'
volume: 26
year: '2021'
...
---
_id: '21679'
abstract:
- lang: eng
text: Three-dimensional modelling enables to determine the in-plane material
flow in asymmetrical situation. Thus, the distortion of the sheets to be joined
can be characterized more exactly. This study shows a method for building up a
three-dimensional shear-clinching framework without damage criteria. In fact,
the die-sided sheet in shear-clinching was designed as a pre-punched sheet and
slugs. The material separation in the die-sided joining partner, which in two-dimensional
simulation is often described by macro- and micromechanical fracture criteria,
was realised in this study based on a defined contact condition. By means of a
shear-cutting simulation, a correlation between the break angle and the separation
stress was determined, which was used as a separation criterion in the shear-clinching
simulation. The separation line was confirmed using post-particles. To validate
this model, the results of the simulation using a quadratic single-point specimen
were compared to the experiments with respect to the distortion of the joining
partner. In general, the built three-dimensional framework provides for further
tool developments with regard to the reduction of distortion in shear-clinching.
author:
- first_name: Daxin
full_name: Han, Daxin
id: '36544'
last_name: Han
- first_name: Chen
full_name: Yang, Chen
last_name: Yang
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: Han D, Yang C, Meschut G. A method for three-dimensional modelling of the shear-clinching
process. ESAFORM 2021. 2021. doi:10.25518/esaform21.1948
apa: Han, D., Yang, C., & Meschut, G. (2021). A method for three-dimensional
modelling of the shear-clinching process. ESAFORM 2021. https://doi.org/10.25518/esaform21.1948
bibtex: '@article{Han_Yang_Meschut_2021, title={A method for three-dimensional modelling
of the shear-clinching process}, DOI={10.25518/esaform21.1948},
journal={ESAFORM 2021}, author={Han, Daxin and Yang, Chen and Meschut, Gerson},
year={2021} }'
chicago: Han, Daxin, Chen Yang, and Gerson Meschut. “A Method for Three-Dimensional
Modelling of the Shear-Clinching Process.” ESAFORM 2021, 2021. https://doi.org/10.25518/esaform21.1948.
ieee: D. Han, C. Yang, and G. Meschut, “A method for three-dimensional modelling
of the shear-clinching process,” ESAFORM 2021, 2021.
mla: Han, Daxin, et al. “A Method for Three-Dimensional Modelling of the Shear-Clinching
Process.” ESAFORM 2021, 2021, doi:10.25518/esaform21.1948.
short: D. Han, C. Yang, G. Meschut, ESAFORM 2021 (2021).
date_created: 2021-04-21T06:22:10Z
date_updated: 2022-01-06T06:55:10Z
department:
- _id: '157'
doi: 10.25518/esaform21.1948
language:
- iso: eng
publication: ESAFORM 2021
publication_status: published
status: public
title: A method for three-dimensional modelling of the shear-clinching process
type: journal_article
user_id: '36544'
year: '2021'
...
---
_id: '22013'
author:
- first_name: Henning
full_name: Zeipert, Henning
id: '32580'
last_name: Zeipert
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Sarah
full_name: Johannesmann, Sarah
id: '29190'
last_name: Johannesmann
- first_name: Manuel
full_name: Webersen, Manuel
id: '11289'
last_name: Webersen
orcid: 0000-0001-6411-4232
- first_name: Yevgeniya
full_name: Lugovtsova, Yevgeniya
last_name: Lugovtsova
- first_name: Jens
full_name: Prager, Jens
last_name: Prager
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Zeipert H, Claes L, Johannesmann S, et al. Measurement and Simulation of Lamb
Waves in Adhesive-bonded Multilayer Systems. In: ; 2021:91-92. doi:10.5162/SMSI2021/A8.2'
apa: Zeipert, H., Claes, L., Johannesmann, S., Webersen, M., Lugovtsova, Y., Prager,
J., & Henning, B. (2021). Measurement and Simulation of Lamb Waves in Adhesive-bonded
Multilayer Systems (pp. 91–92). Presented at the Sensor and Measurement Science
International, Nürnberg. https://doi.org/10.5162/SMSI2021/A8.2
bibtex: '@inproceedings{Zeipert_Claes_Johannesmann_Webersen_Lugovtsova_Prager_Henning_2021,
title={Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer
Systems}, DOI={10.5162/SMSI2021/A8.2},
author={Zeipert, Henning and Claes, Leander and Johannesmann, Sarah and Webersen,
Manuel and Lugovtsova, Yevgeniya and Prager, Jens and Henning, Bernd}, year={2021},
pages={91–92} }'
chicago: Zeipert, Henning, Leander Claes, Sarah Johannesmann, Manuel Webersen, Yevgeniya
Lugovtsova, Jens Prager, and Bernd Henning. “Measurement and Simulation of Lamb
Waves in Adhesive-Bonded Multilayer Systems,” 91–92, 2021. https://doi.org/10.5162/SMSI2021/A8.2.
ieee: H. Zeipert et al., “Measurement and Simulation of Lamb Waves in Adhesive-bonded
Multilayer Systems,” presented at the Sensor and Measurement Science International,
Nürnberg, 2021, pp. 91–92.
mla: Zeipert, Henning, et al. Measurement and Simulation of Lamb Waves in Adhesive-Bonded
Multilayer Systems. 2021, pp. 91–92, doi:10.5162/SMSI2021/A8.2.
short: 'H. Zeipert, L. Claes, S. Johannesmann, M. Webersen, Y. Lugovtsova, J. Prager,
B. Henning, in: 2021, pp. 91–92.'
conference:
location: Nürnberg
name: Sensor and Measurement Science International
date_created: 2021-05-07T07:33:54Z
date_updated: 2022-01-06T06:55:22Z
department:
- _id: '49'
doi: 10.5162/SMSI2021/A8.2
language:
- iso: eng
page: 91 - 92
project:
- _id: '105'
grant_number: '449607253'
name: Vermiedene Kreuzungen von Lamb-Wellenmoden in mehrlagigen Strukturen
status: public
title: Measurement and Simulation of Lamb Waves in Adhesive-bonded Multilayer Systems
type: conference
user_id: '32580'
year: '2021'
...
---
_id: '29849'
abstract:
- lang: eng
text: 'DC-DC converters for on-board chargers (OBC) of electrical vehicles are usually
galvanically isolated allowing modular single-phase PFC front-end solutions, but
require transformers which are more bulky, costly and lossy than inductors of
non-isolated DC-DCs. Furthermore, for vehicle-to-grid applications, bidirectional
converters with transformers are generally more complex and have a higher count
on semiconductor switches than transformerless solutions. However, when using
non-isolated DC-DC converters within an OBC, the large common-mode (CM) capacitance
comprising capacitive parasitics of the traction battery as well as explicit Y-capacitors
connecting the high-voltage DC-system (HV-system) within specific HV-loads to
ground has to be considered. For the PFC front-end stage, when supplied from the
three-phase mains this means that generation of high-frequency and high-amplitude
CM voltages, as it is common e.g. with the conventional six-switch full-bridge
converter, has to be strictly avoided. For this reason, a modified topology is
suggested leading to a different mode of operation and to a very low common-mode
noise behaviour: The three-phase four-wire full-bridge PFC with split DC-link,
whose midpoint is connected to the mains neutral provides very stable potentials
at the DC-link rails and therefore it can be classified as Zero-CM-topology.For
dedicated single-phase operation, as required for most OBC, an additional balancing
leg may be added to the topology to reduce the required DC-link capacitance and
allow non-electrolytic capacitors.The function of the bidirectional Zero-CM three-phase
four-wire full-bridge PFC was verified by simulation and on an 11 kW-laboratory
sample. The power factor is above 0.999 and an efficiency of 98 % is measured.'
author:
- first_name: Benjamin
full_name: Strothmann, Benjamin
id: '22556'
last_name: Strothmann
- first_name: Frank
full_name: Schafmeister, Frank
id: '71291'
last_name: Schafmeister
- first_name: Joachim
full_name: Böcker, Joachim
id: '66'
last_name: Böcker
orcid: 0000-0002-8480-7295
citation:
ama: 'Strothmann B, Schafmeister F, Böcker J. Common-Mode-Free Bidirectional Three-Phase
PFC-Rectifier for Non-Isolated EV Charger. In: 2021 IEEE Applied Power Electronics
Conference and Exposition (APEC). IEEE; 2021. doi:10.1109/apec42165.2021.9487462'
apa: Strothmann, B., Schafmeister, F., & Böcker, J. (2021). Common-Mode-Free
Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger. 2021 IEEE
Applied Power Electronics Conference and Exposition (APEC). https://doi.org/10.1109/apec42165.2021.9487462
bibtex: '@inproceedings{Strothmann_Schafmeister_Böcker_2021, title={Common-Mode-Free
Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger}, DOI={10.1109/apec42165.2021.9487462},
booktitle={2021 IEEE Applied Power Electronics Conference and Exposition (APEC)},
publisher={IEEE}, author={Strothmann, Benjamin and Schafmeister, Frank and Böcker,
Joachim}, year={2021} }'
chicago: Strothmann, Benjamin, Frank Schafmeister, and Joachim Böcker. “Common-Mode-Free
Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV Charger.” In 2021
IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021.
https://doi.org/10.1109/apec42165.2021.9487462.
ieee: 'B. Strothmann, F. Schafmeister, and J. Böcker, “Common-Mode-Free Bidirectional
Three-Phase PFC-Rectifier for Non-Isolated EV Charger,” 2021, doi: 10.1109/apec42165.2021.9487462.'
mla: Strothmann, Benjamin, et al. “Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier
for Non-Isolated EV Charger.” 2021 IEEE Applied Power Electronics Conference
and Exposition (APEC), IEEE, 2021, doi:10.1109/apec42165.2021.9487462.
short: 'B. Strothmann, F. Schafmeister, J. Böcker, in: 2021 IEEE Applied Power Electronics
Conference and Exposition (APEC), IEEE, 2021.'
date_created: 2022-02-15T09:14:56Z
date_updated: 2022-02-21T19:25:17Z
department:
- _id: '52'
doi: 10.1109/apec42165.2021.9487462
keyword:
- Three-phase four-wire
- OBC
- Y2G
- PFC
- CM
- EY charger
- balancing circuit
language:
- iso: eng
publication: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
publication_status: published
publisher: IEEE
status: public
title: Common-Mode-Free Bidirectional Three-Phase PFC-Rectifier for Non-Isolated EV
Charger
type: conference
user_id: '66'
year: '2021'
...
---
_id: '22162'
author:
- first_name: Gerrit
full_name: Book, Gerrit
last_name: Book
- first_name: Arne
full_name: Traue, Arne
last_name: Traue
- first_name: Praneeth
full_name: Balakrishna, Praneeth
last_name: Balakrishna
- first_name: Anian
full_name: Brosch, Anian
id: '75779'
last_name: Brosch
orcid: 0000-0003-4871-1664
- first_name: Maximilian
full_name: Schenke, Maximilian
id: '52638'
last_name: Schenke
orcid: 0000-0001-5427-9527
- first_name: Sören
full_name: Hanke, Sören
id: '25027'
last_name: Hanke
- first_name: Wilhelm
full_name: Kirchgässner, Wilhelm
id: '49265'
last_name: Kirchgässner
orcid: 0000-0001-9490-1843
- first_name: Oliver
full_name: Wallscheid, Oliver
id: '11291'
last_name: Wallscheid
orcid: https://orcid.org/0000-0001-9362-8777
citation:
ama: Book G, Traue A, Balakrishna P, et al. Transferring Online Reinforcement Learning
for Electric Motor Control From Simulation to Real-World Experiments. IEEE
Open Journal of Power Electronics. Published online 2021:187-201. doi:10.1109/ojpel.2021.3065877
apa: Book, G., Traue, A., Balakrishna, P., Brosch, A., Schenke, M., Hanke, S., Kirchgässner,
W., & Wallscheid, O. (2021). Transferring Online Reinforcement Learning for
Electric Motor Control From Simulation to Real-World Experiments. IEEE Open
Journal of Power Electronics, 187–201. https://doi.org/10.1109/ojpel.2021.3065877
bibtex: '@article{Book_Traue_Balakrishna_Brosch_Schenke_Hanke_Kirchgässner_Wallscheid_2021,
title={Transferring Online Reinforcement Learning for Electric Motor Control From
Simulation to Real-World Experiments}, DOI={10.1109/ojpel.2021.3065877},
journal={IEEE Open Journal of Power Electronics}, author={Book, Gerrit and Traue,
Arne and Balakrishna, Praneeth and Brosch, Anian and Schenke, Maximilian and Hanke,
Sören and Kirchgässner, Wilhelm and Wallscheid, Oliver}, year={2021}, pages={187–201}
}'
chicago: Book, Gerrit, Arne Traue, Praneeth Balakrishna, Anian Brosch, Maximilian
Schenke, Sören Hanke, Wilhelm Kirchgässner, and Oliver Wallscheid. “Transferring
Online Reinforcement Learning for Electric Motor Control From Simulation to Real-World
Experiments.” IEEE Open Journal of Power Electronics, 2021, 187–201. https://doi.org/10.1109/ojpel.2021.3065877.
ieee: 'G. Book et al., “Transferring Online Reinforcement Learning for Electric
Motor Control From Simulation to Real-World Experiments,” IEEE Open Journal
of Power Electronics, pp. 187–201, 2021, doi: 10.1109/ojpel.2021.3065877.'
mla: Book, Gerrit, et al. “Transferring Online Reinforcement Learning for Electric
Motor Control From Simulation to Real-World Experiments.” IEEE Open Journal
of Power Electronics, 2021, pp. 187–201, doi:10.1109/ojpel.2021.3065877.
short: G. Book, A. Traue, P. Balakrishna, A. Brosch, M. Schenke, S. Hanke, W. Kirchgässner,
O. Wallscheid, IEEE Open Journal of Power Electronics (2021) 187–201.
date_created: 2021-05-12T16:54:27Z
date_updated: 2022-02-22T08:51:05Z
department:
- _id: '52'
doi: 10.1109/ojpel.2021.3065877
language:
- iso: eng
page: 187-201
publication: IEEE Open Journal of Power Electronics
publication_identifier:
issn:
- 2644-1314
publication_status: published
status: public
title: Transferring Online Reinforcement Learning for Electric Motor Control From
Simulation to Real-World Experiments
type: journal_article
user_id: '66'
year: '2021'
...
---
_id: '29871'
abstract:
- lang: eng
text: "LLC resonant converters typically employ power\r\nMOSFETs in their inverter
stage. The generally weak reverse\r\nrecovery behaviour of the intrinsic body
diodes of those\r\nMOSFETs causes significant turn-on losses when being forced\r\nto
hard commutations. Continuous operation in this way will\r\nlead to self-destruction
of the transistors. Consequently,\r\nzero-voltage switching (ZVS) is essential
in a MOSFET-based\r\ninverter stage. To ensure ZVS, the LLC converter is operated
in\r\nthe inductive region. On the contrary, IGBTs show dominant\r\nturn-off losses
and are therefore conventionally not applied in\r\nLLC converters typically requiring
high switching frequencies\r\nto achieve low output voltages. However, if the
LLC converter\r\nis intentionally designed for capacitive operation, zero-current\r\nswitching
(ZCS) is enabled and thus robust and cost-efficient\r\nIGBTs can be applied in
the inverter stage. The aim of this work\r\nis to investigate the use IGBTs in
the inverter of an LLC\r\nconverter. The theory behind the capacitive operated
LLC is\r\nderived using a switched simulation model and compared with\r\nthe fundamental
harmonic approximation (FHA). The results\r\nprove FHA to be useless for practical
converter design. Instead,\r\na stress value analysis based on switched model
simulations is\r\nproposed to the design a capacitive operated LLC utilizing ZCS.\r\nA
2 kW prototype for on-board EV applications was built to\r\nverify the theory
and design approach. The prototype confirms\r\nthe derived theory and thus the
deployment of IGBTs in the\r\ninverter stage of LLC resonant converters. Synchronous\r\nrectification
turns out to require a specific control solution, but\r\nif given the resulting
efficiency in the most critical operation\r\npoint exceeds the value of a MOSFET-based
(inductive\r\noperated) LLC-design of an identical application. Therefore,\r\nthis
concept should be further developed."
author:
- first_name: Daniel
full_name: Urbaneck, Daniel
id: '60223'
last_name: Urbaneck
- first_name: Philipp
full_name: Rehlaender, Philipp
id: '69469'
last_name: Rehlaender
- first_name: Joachim
full_name: Böcker, Joachim
id: '66'
last_name: Böcker
orcid: 0000-0002-8480-7295
- first_name: Frank
full_name: Schafmeister, Frank
id: '71291'
last_name: Schafmeister
citation:
ama: 'Urbaneck D, Rehlaender P, Böcker J, Schafmeister F. LLC Converter in Capacitive
Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification of a 2 kW
DC-DC Converter for EVs. In: 2021 IEEE Applied Power Electronics Conference
and Exposition (APEC). ; 2021.'
apa: Urbaneck, D., Rehlaender, P., Böcker, J., & Schafmeister, F. (2021). LLC
Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and
Verification of a 2 kW DC-DC Converter for EVs. 2021 IEEE Applied Power Electronics
Conference and Exposition (APEC). Applied Power Electronics Conference (APEC),
Arizona.
bibtex: '@inproceedings{Urbaneck_Rehlaender_Böcker_Schafmeister_2021, title={LLC
Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and
Verification of a 2 kW DC-DC Converter for EVs}, booktitle={2021 IEEE Applied
Power Electronics Conference and Exposition (APEC)}, author={Urbaneck, Daniel
and Rehlaender, Philipp and Böcker, Joachim and Schafmeister, Frank}, year={2021}
}'
chicago: Urbaneck, Daniel, Philipp Rehlaender, Joachim Böcker, and Frank Schafmeister.
“LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept
and Verification of a 2 KW DC-DC Converter for EVs.” In 2021 IEEE Applied Power
Electronics Conference and Exposition (APEC), 2021.
ieee: D. Urbaneck, P. Rehlaender, J. Böcker, and F. Schafmeister, “LLC Converter
in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept and Verification
of a 2 kW DC-DC Converter for EVs,” presented at the Applied Power Electronics
Conference (APEC), Arizona, 2021.
mla: Urbaneck, Daniel, et al. “LLC Converter in Capacitive Operation Utilizing ZCS
for IGBTs – Theory, Concept and Verification of a 2 KW DC-DC Converter for EVs.”
2021 IEEE Applied Power Electronics Conference and Exposition (APEC), 2021.
short: 'D. Urbaneck, P. Rehlaender, J. Böcker, F. Schafmeister, in: 2021 IEEE Applied
Power Electronics Conference and Exposition (APEC), 2021.'
conference:
end_date: 2021-06-17
location: Arizona
name: Applied Power Electronics Conference (APEC)
start_date: 2021-06-14
date_created: 2022-02-18T09:36:01Z
date_updated: 2022-02-23T16:12:38Z
ddc:
- '620'
department:
- _id: '52'
has_accepted_license: '1'
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9487109
publication: 2021 IEEE Applied Power Electronics Conference and Exposition (APEC)
publication_status: published
status: public
title: LLC Converter in Capacitive Operation Utilizing ZCS for IGBTs – Theory, Concept
and Verification of a 2 kW DC-DC Converter for EVs
type: conference
user_id: '60223'
year: '2021'
...
---
_id: '21254'
article_number: '2498'
author:
- first_name: Praneeth
full_name: Balakrishna, Praneeth
last_name: Balakrishna
- first_name: Gerrit
full_name: Book, Gerrit
last_name: Book
- first_name: Wilhelm
full_name: Kirchgässner, Wilhelm
id: '49265'
last_name: Kirchgässner
orcid: 0000-0001-9490-1843
- first_name: Maximilian
full_name: Schenke, Maximilian
id: '52638'
last_name: Schenke
orcid: 0000-0001-5427-9527
- first_name: Arne
full_name: Traue, Arne
last_name: Traue
- first_name: Oliver
full_name: Wallscheid, Oliver
id: '11291'
last_name: Wallscheid
orcid: https://orcid.org/0000-0001-9362-8777
citation:
ama: 'Balakrishna P, Book G, Kirchgässner W, Schenke M, Traue A, Wallscheid O. gym-electric-motor
(GEM): A Python toolbox for the simulation of electric drive systems. Journal
of Open Source Software. Published online 2021. doi:10.21105/joss.02498'
apa: 'Balakrishna, P., Book, G., Kirchgässner, W., Schenke, M., Traue, A., &
Wallscheid, O. (2021). gym-electric-motor (GEM): A Python toolbox for the simulation
of electric drive systems. Journal of Open Source Software, Article 2498.
https://doi.org/10.21105/joss.02498'
bibtex: '@article{Balakrishna_Book_Kirchgässner_Schenke_Traue_Wallscheid_2021, title={gym-electric-motor
(GEM): A Python toolbox for the simulation of electric drive systems}, DOI={10.21105/joss.02498}, number={2498},
journal={Journal of Open Source Software}, author={Balakrishna, Praneeth and Book,
Gerrit and Kirchgässner, Wilhelm and Schenke, Maximilian and Traue, Arne and Wallscheid,
Oliver}, year={2021} }'
chicago: 'Balakrishna, Praneeth, Gerrit Book, Wilhelm Kirchgässner, Maximilian Schenke,
Arne Traue, and Oliver Wallscheid. “Gym-Electric-Motor (GEM): A Python Toolbox
for the Simulation of Electric Drive Systems.” Journal of Open Source Software,
2021. https://doi.org/10.21105/joss.02498.'
ieee: 'P. Balakrishna, G. Book, W. Kirchgässner, M. Schenke, A. Traue, and O. Wallscheid,
“gym-electric-motor (GEM): A Python toolbox for the simulation of electric drive
systems,” Journal of Open Source Software, Art. no. 2498, 2021, doi: 10.21105/joss.02498.'
mla: 'Balakrishna, Praneeth, et al. “Gym-Electric-Motor (GEM): A Python Toolbox
for the Simulation of Electric Drive Systems.” Journal of Open Source Software,
2498, 2021, doi:10.21105/joss.02498.'
short: P. Balakrishna, G. Book, W. Kirchgässner, M. Schenke, A. Traue, O. Wallscheid,
Journal of Open Source Software (2021).
date_created: 2021-02-16T21:40:12Z
date_updated: 2022-02-25T20:31:36Z
department:
- _id: '52'
doi: 10.21105/joss.02498
language:
- iso: eng
publication: Journal of Open Source Software
publication_identifier:
issn:
- 2475-9066
publication_status: published
status: public
title: 'gym-electric-motor (GEM): A Python toolbox for the simulation of electric
drive systems'
type: journal_article
user_id: '11291'
year: '2021'
...
---
_id: '30648'
abstract:
- lang: eng
text: In clinching, the combinations of requirements, materials, component dimensions
and tools influence the resulting joint geometry and the resulting bonding mechanisms.
These in turn affect the property profile of the joint. For example, it is possible
to use different tools to flexibly adapt clinching points to the respective required
load regime. Clinching points dimensioned in this way can be geometrically similar,
but have different mechanical stress states, which leads to different properties
in terms of load-bearing behavior. Within the scope of this work, the clinching
process with different tools in optimal and compromise design and its effect on
the force and form-closure component, is investigated in a torsion test of the
clinched connection. Clinched steel sheets with two thicknesses and joining directions
are analyzed. Virtual experiments are carried out using finite element analyses
(FEA) of the joining process and are followed by a springback simulation. Subsequently,
the surface pressure between the two joining partners in the clinching points
is calculated on the basis of the results from the FEA and the transmittable moment
of the connection, as an indicator for the force-closure component, is determined.
Finally, the experimental and simulated data are compared and discussed.
author:
- first_name: C.
full_name: Steinfelder, C.
last_name: Steinfelder
- first_name: J.
full_name: Kalich, J.
last_name: Kalich
- first_name: A.
full_name: Brosius, A.
last_name: Brosius
- first_name: U.
full_name: Füssel, U.
last_name: Füssel
citation:
ama: 'Steinfelder C, Kalich J, Brosius A, Füssel U. Numerical and experimental investigation
of the transmission moment of clinching points. IOP Conference Series: Materials
Science and Engineering. 2021;1157:012003. doi:10.1088/1757-899x/1157/1/012003'
apa: 'Steinfelder, C., Kalich, J., Brosius, A., & Füssel, U. (2021). Numerical
and experimental investigation of the transmission moment of clinching points.
IOP Conference Series: Materials Science and Engineering, 1157,
012003. https://doi.org/10.1088/1757-899x/1157/1/012003'
bibtex: '@article{Steinfelder_Kalich_Brosius_Füssel_2021, title={Numerical and experimental
investigation of the transmission moment of clinching points}, volume={1157},
DOI={10.1088/1757-899x/1157/1/012003},
journal={IOP Conference Series: Materials Science and Engineering}, author={Steinfelder,
C. and Kalich, J. and Brosius, A. and Füssel, U.}, year={2021}, pages={012003}
}'
chicago: 'Steinfelder, C., J. Kalich, A. Brosius, and U. Füssel. “Numerical and
Experimental Investigation of the Transmission Moment of Clinching Points.” IOP
Conference Series: Materials Science and Engineering 1157 (2021): 012003.
https://doi.org/10.1088/1757-899x/1157/1/012003.'
ieee: 'C. Steinfelder, J. Kalich, A. Brosius, and U. Füssel, “Numerical and experimental
investigation of the transmission moment of clinching points,” IOP Conference
Series: Materials Science and Engineering, vol. 1157, p. 012003, 2021, doi:
10.1088/1757-899x/1157/1/012003.'
mla: 'Steinfelder, C., et al. “Numerical and Experimental Investigation of the Transmission
Moment of Clinching Points.” IOP Conference Series: Materials Science and Engineering,
vol. 1157, 2021, p. 012003, doi:10.1088/1757-899x/1157/1/012003.'
short: 'C. Steinfelder, J. Kalich, A. Brosius, U. Füssel, IOP Conference Series:
Materials Science and Engineering 1157 (2021) 012003.'
date_created: 2022-03-28T12:43:52Z
date_updated: 2022-03-29T15:38:11Z
doi: 10.1088/1757-899x/1157/1/012003
intvolume: ' 1157'
language:
- iso: eng
page: '012003'
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '132'
name: 'TRR 285 - B: TRR 285 - Project Area B'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '138'
name: 'TRR 285 – A04: TRR 285 - Subproject A04'
- _id: '140'
name: 'TRR 285 – B01: TRR 285 - Subproject B01'
publication: 'IOP Conference Series: Materials Science and Engineering'
status: public
title: Numerical and experimental investigation of the transmission moment of clinching
points
type: journal_article
user_id: '68518'
volume: 1157
year: '2021'
...
---
_id: '30906'
abstract:
- lang: eng
text: "Abstract\r\n Background\r\n
\ Hand amputation can have a truly debilitating impact on
the life of the affected person. A multifunctional myoelectric prosthesis controlled
using pattern classification can be used to restore some of the lost motor abilities.
However, learning to control an advanced prosthesis can be a challenging task,
but virtual and augmented reality (AR) provide means to create an engaging and
motivating training.\r\n \r\n Methods\r\n
\ In this study, we present a novel training framework that
integrates virtual elements within a real scene (AR) while allowing the view from
the first-person perspective. The framework was evaluated in 13 able-bodied subjects
and a limb-deficient person divided into intervention (IG) and control (CG) groups.
The IG received training by performing simulated clothespin task and both groups
conducted a pre- and posttest with a real prosthesis. When training with the AR,
the subjects received visual feedback on the generated grasping force. The main
outcome measure was the number of pins that were successfully transferred within
20 min (task duration), while the number of dropped and broken pins were also
registered. The participants were asked to score the difficulty of the real task
(posttest), fun-factor and motivation, as well as the utility of the feedback.\r\n
\ \r\n Results\r\n
\ The performance (median/interquartile range) consistently
increased during the training sessions (4/3 to 22/4). While the results were similar
for the two groups in the pretest, the performance improved in the posttest only
in IG. In addition, the subjects in IG transferred significantly more pins (28/10.5
versus 14.5/11), and dropped (1/2.5 versus 3.5/2) and broke (5/3.8 versus 14.5/9)
significantly fewer pins in the posttest compared to CG. The participants in IG
assigned (mean ± std) significantly lower scores to the difficulty compared to
CG (5.2 ± 1.9 versus 7.1 ± 0.9), and they highly rated the fun factor (8.7 ± 1.3)
and usefulness of feedback (8.5 ± 1.7).\r\n \r\n
\ Conclusion\r\n The
results demonstrated that the proposed AR system allows for the transfer of skills
from the simulated to the real task while providing a positive user experience.
The present study demonstrates the effectiveness and flexibility of the proposed
AR framework. Importantly, the developed system is open source and available for
download and further development.\r\n "
article_number: '25'
author:
- first_name: Alexander
full_name: Boschmann, Alexander
last_name: Boschmann
- first_name: Dorothee
full_name: Neuhaus, Dorothee
last_name: Neuhaus
- first_name: Sarah
full_name: Vogt, Sarah
last_name: Vogt
- first_name: Christian
full_name: Kaltschmidt, Christian
last_name: Kaltschmidt
- first_name: Marco
full_name: Platzner, Marco
id: '398'
last_name: Platzner
- first_name: Strahinja
full_name: Dosen, Strahinja
last_name: Dosen
citation:
ama: Boschmann A, Neuhaus D, Vogt S, Kaltschmidt C, Platzner M, Dosen S. Immersive
augmented reality system for the training of pattern classification control with
a myoelectric prosthesis. Journal of NeuroEngineering and Rehabilitation.
2021;18(1). doi:10.1186/s12984-021-00822-6
apa: Boschmann, A., Neuhaus, D., Vogt, S., Kaltschmidt, C., Platzner, M., &
Dosen, S. (2021). Immersive augmented reality system for the training of pattern
classification control with a myoelectric prosthesis. Journal of NeuroEngineering
and Rehabilitation, 18(1), Article 25. https://doi.org/10.1186/s12984-021-00822-6
bibtex: '@article{Boschmann_Neuhaus_Vogt_Kaltschmidt_Platzner_Dosen_2021, title={Immersive
augmented reality system for the training of pattern classification control with
a myoelectric prosthesis}, volume={18}, DOI={10.1186/s12984-021-00822-6},
number={125}, journal={Journal of NeuroEngineering and Rehabilitation}, publisher={Springer
Science and Business Media LLC}, author={Boschmann, Alexander and Neuhaus, Dorothee
and Vogt, Sarah and Kaltschmidt, Christian and Platzner, Marco and Dosen, Strahinja},
year={2021} }'
chicago: Boschmann, Alexander, Dorothee Neuhaus, Sarah Vogt, Christian Kaltschmidt,
Marco Platzner, and Strahinja Dosen. “Immersive Augmented Reality System for the
Training of Pattern Classification Control with a Myoelectric Prosthesis.” Journal
of NeuroEngineering and Rehabilitation 18, no. 1 (2021). https://doi.org/10.1186/s12984-021-00822-6.
ieee: 'A. Boschmann, D. Neuhaus, S. Vogt, C. Kaltschmidt, M. Platzner, and S. Dosen,
“Immersive augmented reality system for the training of pattern classification
control with a myoelectric prosthesis,” Journal of NeuroEngineering and Rehabilitation,
vol. 18, no. 1, Art. no. 25, 2021, doi: 10.1186/s12984-021-00822-6.'
mla: Boschmann, Alexander, et al. “Immersive Augmented Reality System for the Training
of Pattern Classification Control with a Myoelectric Prosthesis.” Journal of
NeuroEngineering and Rehabilitation, vol. 18, no. 1, 25, Springer Science
and Business Media LLC, 2021, doi:10.1186/s12984-021-00822-6.
short: A. Boschmann, D. Neuhaus, S. Vogt, C. Kaltschmidt, M. Platzner, S. Dosen,
Journal of NeuroEngineering and Rehabilitation 18 (2021).
date_created: 2022-04-18T10:02:20Z
date_updated: 2022-04-18T10:04:16Z
department:
- _id: '78'
doi: 10.1186/s12984-021-00822-6
intvolume: ' 18'
issue: '1'
keyword:
- Health Informatics
- Rehabilitation
language:
- iso: eng
publication: Journal of NeuroEngineering and Rehabilitation
publication_identifier:
issn:
- 1743-0003
publication_status: published
publisher: Springer Science and Business Media LLC
status: public
title: Immersive augmented reality system for the training of pattern classification
control with a myoelectric prosthesis
type: journal_article
user_id: '398'
volume: 18
year: '2021'
...
---
_id: '25476'
abstract:
- lang: eng
text: This study deals with the damage behavior of metallic materials by the application
of different manufacturing processes and using different optical measurement methods
to identify the crack initiation in the damage specimen. The study is intended
to highlight the importance of considering manufacturing processes and optical
measurement methods in a numerical simulation when analyzing the damage behavior
of metallic materials. To describe the damage behavior of the material in the
process chain simulations, it is important to calibrate the parameters of damage
model more accurately. These parameters are determined using experimental investigation
of desired damage specimens. In this regard, a selected damage specimen manufactured
by different cutting processes is first experimentally and then numerically investigated.
It is shown that the manufacturing process and the optical measurement methods
influence the stress state analyzed in the numerical simulation.
article_type: original
author:
- first_name: Mortaza
full_name: Otroshi, Mortaza
id: '71269'
last_name: Otroshi
orcid: 0000-0002-8652-9209
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Aathavan
full_name: Nesakumar, Aathavan
last_name: Nesakumar
citation:
ama: Otroshi M, Meschut G, Nesakumar A. The influence of manufacturing processes
and optical measurement methods on the damage behavior of HX340LAD micro-alloyed
steels. Journal of Manufacturing Engineering. 2021;16(3):70-76. doi:https://doi.org/10.37255/jme.v16i3pp070-076
apa: Otroshi, M., Meschut, G., & Nesakumar, A. (2021). The influence of manufacturing
processes and optical measurement methods on the damage behavior of HX340LAD micro-alloyed
steels. Journal of Manufacturing Engineering, 16(3), 70–76. https://doi.org/10.37255/jme.v16i3pp070-076
bibtex: '@article{Otroshi_Meschut_Nesakumar_2021, title={The influence of manufacturing
processes and optical measurement methods on the damage behavior of HX340LAD micro-alloyed
steels}, volume={16}, DOI={https://doi.org/10.37255/jme.v16i3pp070-076},
number={3}, journal={Journal of Manufacturing Engineering}, author={Otroshi, Mortaza
and Meschut, Gerson and Nesakumar, Aathavan}, year={2021}, pages={70–76} }'
chicago: 'Otroshi, Mortaza, Gerson Meschut, and Aathavan Nesakumar. “The Influence
of Manufacturing Processes and Optical Measurement Methods on the Damage Behavior
of HX340LAD Micro-Alloyed Steels.” Journal of Manufacturing Engineering
16, no. 3 (2021): 70–76. https://doi.org/10.37255/jme.v16i3pp070-076.'
ieee: 'M. Otroshi, G. Meschut, and A. Nesakumar, “The influence of manufacturing
processes and optical measurement methods on the damage behavior of HX340LAD micro-alloyed
steels,” Journal of Manufacturing Engineering, vol. 16, no. 3, pp. 70–76,
2021, doi: https://doi.org/10.37255/jme.v16i3pp070-076.'
mla: Otroshi, Mortaza, et al. “The Influence of Manufacturing Processes and Optical
Measurement Methods on the Damage Behavior of HX340LAD Micro-Alloyed Steels.”
Journal of Manufacturing Engineering, vol. 16, no. 3, 2021, pp. 70–76,
doi:https://doi.org/10.37255/jme.v16i3pp070-076.
short: M. Otroshi, G. Meschut, A. Nesakumar, Journal of Manufacturing Engineering
16 (2021) 70–76.
date_created: 2021-10-05T09:11:47Z
date_updated: 2022-04-25T07:48:07Z
department:
- _id: '157'
doi: https://doi.org/10.37255/jme.v16i3pp070-076
intvolume: ' 16'
issue: '3'
keyword:
- Damage behaviour
- Stress triaxiality
- Manufacturing process and Optical measurement
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://smenec.org/index.php/1/article/view/187
oa: '1'
page: 70-76
publication: Journal of Manufacturing Engineering
publication_status: published
quality_controlled: '1'
status: public
title: The influence of manufacturing processes and optical measurement methods on
the damage behavior of HX340LAD micro-alloyed steels
type: journal_article
user_id: '71269'
volume: 16
year: '2021'
...