---
_id: '41492'
abstract:
- lang: eng
text: The current investigation shows the feasibility of 316L steel powder
production via three different argon gas atomisation routes (closed coupled atomisation,
free fall atomisation with and without hot gas), along with subsequent sample
production by laser powder bed fusion (PBF-LB). Here, a mixture of pure Fe and
atomised 316L steel powder is used for PBF-LB to induce a chemical composition
gradient in the microstructure. Optical microscopy and μ-CT investigations proved
that the samples processed by PBF-LB exhibit very little porosity. Combined EBSD-EDS
measurements show the chemical composition gradient leading to the formation of
a local fcc-structure. Upon heat treatment (1100 °C, 14 h), the chemical composition
is homogeneous throughout the microstructure. A moderate decrease (1060 to 985
MPa) in the sample’s ultimate tensile strength (UTS) is observed after heat treatment.
However, the total elongation of the as-built and heat-treated samples remains
the same (≈22%). Similarly, a slight decrease in the hardness from 341 to 307
HV1 is observed upon heat treatment.
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Anatolii
full_name: Andreiev, Anatolii
id: '50215'
last_name: Andreiev
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Jan Tobias
full_name: Krüger, Jan Tobias
id: '44307'
last_name: Krüger
orcid: 0000-0002-0827-9654
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Alexander
full_name: Kircheis, Alexander
last_name: Kircheis
- first_name: Weiyu
full_name: Zhao, Weiyu
last_name: Zhao
- first_name: Jörg
full_name: Fischer-Bühner, Jörg
last_name: Fischer-Bühner
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Pramanik S, Andreiev A, Hoyer K-P, et al. Powder Production via Atomisation
and Subsequent Laser Powder Bed Fusion Processing of Fe+316L Steel Hybrid Alloy.
Powders. 2023;2(1):59-74. doi:10.3390/powders2010005
apa: Pramanik, S., Andreiev, A., Hoyer, K.-P., Krüger, J. T., Hengsbach, F., Kircheis,
A., Zhao, W., Fischer-Bühner, J., & Schaper, M. (2023). Powder Production
via Atomisation and Subsequent Laser Powder Bed Fusion Processing of Fe+316L Steel
Hybrid Alloy. Powders, 2(1), 59–74. https://doi.org/10.3390/powders2010005
bibtex: '@article{Pramanik_Andreiev_Hoyer_Krüger_Hengsbach_Kircheis_Zhao_Fischer-Bühner_Schaper_2023,
title={Powder Production via Atomisation and Subsequent Laser Powder Bed Fusion
Processing of Fe+316L Steel Hybrid Alloy}, volume={2}, DOI={10.3390/powders2010005},
number={1}, journal={Powders}, publisher={MDPI AG}, author={Pramanik, Sudipta
and Andreiev, Anatolii and Hoyer, Kay-Peter and Krüger, Jan Tobias and Hengsbach,
Florian and Kircheis, Alexander and Zhao, Weiyu and Fischer-Bühner, Jörg and Schaper,
Mirko}, year={2023}, pages={59–74} }'
chicago: 'Pramanik, Sudipta, Anatolii Andreiev, Kay-Peter Hoyer, Jan Tobias Krüger,
Florian Hengsbach, Alexander Kircheis, Weiyu Zhao, Jörg Fischer-Bühner, and Mirko
Schaper. “Powder Production via Atomisation and Subsequent Laser Powder Bed Fusion
Processing of Fe+316L Steel Hybrid Alloy.” Powders 2, no. 1 (2023): 59–74.
https://doi.org/10.3390/powders2010005.'
ieee: 'S. Pramanik et al., “Powder Production via Atomisation and Subsequent
Laser Powder Bed Fusion Processing of Fe+316L Steel Hybrid Alloy,” Powders,
vol. 2, no. 1, pp. 59–74, 2023, doi: 10.3390/powders2010005.'
mla: Pramanik, Sudipta, et al. “Powder Production via Atomisation and Subsequent
Laser Powder Bed Fusion Processing of Fe+316L Steel Hybrid Alloy.” Powders,
vol. 2, no. 1, MDPI AG, 2023, pp. 59–74, doi:10.3390/powders2010005.
short: S. Pramanik, A. Andreiev, K.-P. Hoyer, J.T. Krüger, F. Hengsbach, A. Kircheis,
W. Zhao, J. Fischer-Bühner, M. Schaper, Powders 2 (2023) 59–74.
date_created: 2023-02-02T14:24:33Z
date_updated: 2023-06-01T14:22:00Z
department:
- _id: '9'
- _id: '158'
doi: 10.3390/powders2010005
intvolume: ' 2'
issue: '1'
language:
- iso: eng
page: 59-74
publication: Powders
publication_identifier:
issn:
- 2674-0516
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Powder Production via Atomisation and Subsequent Laser Powder Bed Fusion Processing
of Fe+316L Steel Hybrid Alloy
type: journal_article
user_id: '43720'
volume: 2
year: '2023'
...
---
_id: '43441'
abstract:
- lang: eng
text: "This paper reveals the 3D character of the intermetallic layer at the aluminum–steel
interface which pops\r\nup above the original sample surface during annealing.
Popping out of the intermetallics was proven using\r\natomic force microscopy.
The phase expands out of the plane due to the exothermic formation of the Al5Fe2\r\nphase
and the feasibility of surface diffusion. Milling by a focused ion beam enabled
the comparison of the\r\nchemical composition of the surface layer with the bulk
interface, showing no difference. The growth direction\r\nis both towards aluminum
and steel — the main diffusion flux is from aluminum towards steel, and the new\r\nintermetallic
phase emerges at the steel side. The shortage of Al atoms causes a shift of the
intermetallic as a\r\nwhole towards aluminum."
article_number: '112043'
article_type: original
author:
- first_name: Michaela
full_name: Šlapáková, Michaela
last_name: Šlapáková
- first_name: Barbora
full_name: Kihoulou, Barbora
last_name: Kihoulou
- first_name: Jozef
full_name: Veselý, Jozef
last_name: Veselý
- first_name: Peter
full_name: Minárik, Peter
last_name: Minárik
- first_name: Klaudia
full_name: Fekete, Klaudia
last_name: Fekete
- first_name: Michal
full_name: Knapek, Michal
last_name: Knapek
- first_name: Rostislav
full_name: Králík, Rostislav
last_name: Králík
- first_name: Olexandr
full_name: Grydin, Olexandr
id: '43822'
last_name: Grydin
- first_name: Mykhailo
full_name: Stolbchenko, Mykhailo
last_name: Stolbchenko
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Šlapáková M, Kihoulou B, Veselý J, et al. 3D-structure of intermetallic interface
layer in Al–steel clad material. Vacuum. 2023;212. doi:10.1016/j.vacuum.2023.112043
apa: Šlapáková, M., Kihoulou, B., Veselý, J., Minárik, P., Fekete, K., Knapek, M.,
Králík, R., Grydin, O., Stolbchenko, M., & Schaper, M. (2023). 3D-structure
of intermetallic interface layer in Al–steel clad material. Vacuum, 212,
Article 112043. https://doi.org/10.1016/j.vacuum.2023.112043
bibtex: '@article{Šlapáková_Kihoulou_Veselý_Minárik_Fekete_Knapek_Králík_Grydin_Stolbchenko_Schaper_2023,
title={3D-structure of intermetallic interface layer in Al–steel clad material},
volume={212}, DOI={10.1016/j.vacuum.2023.112043},
number={112043}, journal={Vacuum}, publisher={Elsevier BV}, author={Šlapáková,
Michaela and Kihoulou, Barbora and Veselý, Jozef and Minárik, Peter and Fekete,
Klaudia and Knapek, Michal and Králík, Rostislav and Grydin, Olexandr and Stolbchenko,
Mykhailo and Schaper, Mirko}, year={2023} }'
chicago: Šlapáková, Michaela, Barbora Kihoulou, Jozef Veselý, Peter Minárik, Klaudia
Fekete, Michal Knapek, Rostislav Králík, Olexandr Grydin, Mykhailo Stolbchenko,
and Mirko Schaper. “3D-Structure of Intermetallic Interface Layer in Al–Steel
Clad Material.” Vacuum 212 (2023). https://doi.org/10.1016/j.vacuum.2023.112043.
ieee: 'M. Šlapáková et al., “3D-structure of intermetallic interface layer
in Al–steel clad material,” Vacuum, vol. 212, Art. no. 112043, 2023, doi:
10.1016/j.vacuum.2023.112043.'
mla: Šlapáková, Michaela, et al. “3D-Structure of Intermetallic Interface Layer
in Al–Steel Clad Material.” Vacuum, vol. 212, 112043, Elsevier BV, 2023,
doi:10.1016/j.vacuum.2023.112043.
short: M. Šlapáková, B. Kihoulou, J. Veselý, P. Minárik, K. Fekete, M. Knapek, R.
Králík, O. Grydin, M. Stolbchenko, M. Schaper, Vacuum 212 (2023).
date_created: 2023-04-08T17:24:40Z
date_updated: 2023-06-01T14:22:15Z
department:
- _id: '158'
doi: 10.1016/j.vacuum.2023.112043
intvolume: ' 212'
keyword:
- Al-steel clad
- twin-roll casting
- 3D characterization
- atomic force microscopy
- diffusion direction
- surface growth
language:
- iso: eng
publication: Vacuum
publication_identifier:
issn:
- 0042-207X
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: 3D-structure of intermetallic interface layer in Al–steel clad material
type: journal_article
user_id: '43720'
volume: 212
year: '2023'
...
---
_id: '44078'
article_number: '117991'
author:
- first_name: Anatolii
full_name: Andreiev, Anatolii
id: '50215'
last_name: Andreiev
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Michael
full_name: Haase, Michael
id: '35970'
last_name: Haase
- first_name: Lennart
full_name: Tasche, Lennart
id: '71508'
last_name: Tasche
- first_name: Kristina
full_name: Duschik, Kristina
last_name: Duschik
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Andreiev A, Hoyer K-P, Hengsbach F, et al. Powder bed fusion of soft-magnetic
iron-based alloys with high silicon content. Journal of Materials Processing
Technology. 2023;317. doi:10.1016/j.jmatprotec.2023.117991
apa: Andreiev, A., Hoyer, K.-P., Hengsbach, F., Haase, M., Tasche, L., Duschik,
K., & Schaper, M. (2023). Powder bed fusion of soft-magnetic iron-based alloys
with high silicon content. Journal of Materials Processing Technology,
317, Article 117991. https://doi.org/10.1016/j.jmatprotec.2023.117991
bibtex: '@article{Andreiev_Hoyer_Hengsbach_Haase_Tasche_Duschik_Schaper_2023, title={Powder
bed fusion of soft-magnetic iron-based alloys with high silicon content}, volume={317},
DOI={10.1016/j.jmatprotec.2023.117991},
number={117991}, journal={Journal of Materials Processing Technology}, publisher={Elsevier
BV}, author={Andreiev, Anatolii and Hoyer, Kay-Peter and Hengsbach, Florian and
Haase, Michael and Tasche, Lennart and Duschik, Kristina and Schaper, Mirko},
year={2023} }'
chicago: Andreiev, Anatolii, Kay-Peter Hoyer, Florian Hengsbach, Michael Haase,
Lennart Tasche, Kristina Duschik, and Mirko Schaper. “Powder Bed Fusion of Soft-Magnetic
Iron-Based Alloys with High Silicon Content.” Journal of Materials Processing
Technology 317 (2023). https://doi.org/10.1016/j.jmatprotec.2023.117991.
ieee: 'A. Andreiev et al., “Powder bed fusion of soft-magnetic iron-based
alloys with high silicon content,” Journal of Materials Processing Technology,
vol. 317, Art. no. 117991, 2023, doi: 10.1016/j.jmatprotec.2023.117991.'
mla: Andreiev, Anatolii, et al. “Powder Bed Fusion of Soft-Magnetic Iron-Based Alloys
with High Silicon Content.” Journal of Materials Processing Technology,
vol. 317, 117991, Elsevier BV, 2023, doi:10.1016/j.jmatprotec.2023.117991.
short: A. Andreiev, K.-P. Hoyer, F. Hengsbach, M. Haase, L. Tasche, K. Duschik,
M. Schaper, Journal of Materials Processing Technology 317 (2023).
date_created: 2023-04-20T10:39:14Z
date_updated: 2023-06-01T14:21:45Z
department:
- _id: '158'
- _id: '146'
- _id: '219'
doi: 10.1016/j.jmatprotec.2023.117991
intvolume: ' 317'
keyword:
- Industrial and Manufacturing Engineering
- Metals and Alloys
- Computer Science Applications
- Modeling and Simulation
- Ceramics and Composites
language:
- iso: eng
publication: Journal of Materials Processing Technology
publication_identifier:
issn:
- 0924-0136
publication_status: published
publisher: Elsevier BV
quality_controlled: '1'
status: public
title: Powder bed fusion of soft-magnetic iron-based alloys with high silicon content
type: journal_article
user_id: '43720'
volume: 317
year: '2023'
...
---
_id: '44116'
abstract:
- lang: eng
text: Faradaic reactions including charge transfer are often accompanied with diffusion
limitation inside the bulk. Conductive two-dimensional frameworks (2D MOFs) with
a fast ion transport can combine both - charge transfer and fast diffusion inside
their porous structure. To study remaining diffusion limitations caused by particle
morphology, different synthesis routes of Cu-2,3,6,7,10,11-hexahydroxytriphenylene
(Cu3(HHTP)2), a copper-based 2D MOF, are used to obtain flake- and rod-like MOF
particles. Both morphologies are systematically characterized and evaluated for
redox-active Li+ ion storage. The redox mechanism is investigated by means of
X-ray absorption spectroscopy, FTIR spectroscopy and in situ XRD. Both types are
compared regarding kinetic properties for Li+ ion storage via cyclic voltammetry
and impedance spectroscopy. A significant influence of particle morphology for
2D MOFs on kinetic aspects of electrochemical Li+ ion storage can be observed.
This study opens the path for optimization of redox active porous structures to
overcome diffusion limitations of Faradaic processes.
author:
- first_name: Jens Matthies
full_name: Wrogemann, Jens Matthies
last_name: Wrogemann
- first_name: Marco Joes
full_name: Lüther, Marco Joes
last_name: Lüther
- first_name: Peer
full_name: Bärmann, Peer
last_name: Bärmann
- first_name: Mailis
full_name: Lounasvuori, Mailis
last_name: Lounasvuori
- first_name: Ali
full_name: Javed, Ali
last_name: Javed
- first_name: Michael
full_name: Tiemann, Michael
id: '23547'
last_name: Tiemann
orcid: 0000-0003-1711-2722
- first_name: Ronny
full_name: Golnak, Ronny
last_name: Golnak
- first_name: Jie
full_name: Xiao, Jie
last_name: Xiao
- first_name: Tristan
full_name: Petit, Tristan
last_name: Petit
- first_name: Tobias
full_name: Placke, Tobias
last_name: Placke
- first_name: Martin
full_name: Winter, Martin
last_name: Winter
citation:
ama: 'Wrogemann JM, Lüther MJ, Bärmann P, et al. Overcoming Diffusion Limitation
of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic
Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage. Angewandte Chemie
International Edition. 2023;62(26):e202303111. doi:10.1002/anie.202303111'
apa: 'Wrogemann, J. M., Lüther, M. J., Bärmann, P., Lounasvuori, M., Javed, A.,
Tiemann, M., Golnak, R., Xiao, J., Petit, T., Placke, T., & Winter, M. (2023).
Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance Relationships
of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible Lithium‐Ion
Storage. Angewandte Chemie International Edition, 62(26), e202303111.
https://doi.org/10.1002/anie.202303111'
bibtex: '@article{Wrogemann_Lüther_Bärmann_Lounasvuori_Javed_Tiemann_Golnak_Xiao_Petit_Placke_et
al._2023, title={Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance
Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible
Lithium‐Ion Storage}, volume={62}, DOI={10.1002/anie.202303111},
number={26}, journal={Angewandte Chemie International Edition}, publisher={Wiley},
author={Wrogemann, Jens Matthies and Lüther, Marco Joes and Bärmann, Peer and
Lounasvuori, Mailis and Javed, Ali and Tiemann, Michael and Golnak, Ronny and
Xiao, Jie and Petit, Tristan and Placke, Tobias and et al.}, year={2023}, pages={e202303111}
}'
chicago: 'Wrogemann, Jens Matthies, Marco Joes Lüther, Peer Bärmann, Mailis Lounasvuori,
Ali Javed, Michael Tiemann, Ronny Golnak, et al. “Overcoming Diffusion Limitation
of Faradaic Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic
Framework Cu3(HHTP)2 for Reversible Lithium‐Ion Storage.” Angewandte Chemie
International Edition 62, no. 26 (2023): e202303111. https://doi.org/10.1002/anie.202303111.'
ieee: 'J. M. Wrogemann et al., “Overcoming Diffusion Limitation of Faradaic
Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework
Cu3(HHTP)2 for Reversible Lithium‐Ion Storage,” Angewandte Chemie International
Edition, vol. 62, no. 26, p. e202303111, 2023, doi: 10.1002/anie.202303111.'
mla: 'Wrogemann, Jens Matthies, et al. “Overcoming Diffusion Limitation of Faradaic
Processes: Property‐Performance Relationships of 2D Conductive Metal‐Organic Framework
Cu3(HHTP)2 for Reversible Lithium‐Ion Storage.” Angewandte Chemie International
Edition, vol. 62, no. 26, Wiley, 2023, p. e202303111, doi:10.1002/anie.202303111.'
short: J.M. Wrogemann, M.J. Lüther, P. Bärmann, M. Lounasvuori, A. Javed, M. Tiemann,
R. Golnak, J. Xiao, T. Petit, T. Placke, M. Winter, Angewandte Chemie International
Edition 62 (2023) e202303111.
date_created: 2023-04-22T06:17:33Z
date_updated: 2023-06-21T09:50:14Z
department:
- _id: '35'
- _id: '2'
- _id: '307'
doi: 10.1002/anie.202303111
intvolume: ' 62'
issue: '26'
keyword:
- General Chemistry
- Catalysis
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
page: e202303111
publication: Angewandte Chemie International Edition
publication_identifier:
issn:
- 1433-7851
- 1521-3773
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: 'Overcoming Diffusion Limitation of Faradaic Processes: Property‐Performance
Relationships of 2D Conductive Metal‐Organic Framework Cu3(HHTP)2 for Reversible
Lithium‐Ion Storage'
type: journal_article
user_id: '23547'
volume: 62
year: '2023'
...
---
_id: '45663'
article_type: review
author:
- first_name: Tobias
full_name: Schmolke, Tobias
id: '44759'
last_name: Schmolke
- first_name: Christian
full_name: Brunner-Schwer, Christian
last_name: Brunner-Schwer
- first_name: Max
full_name: Biegler, Max
last_name: Biegler
- first_name: Michael
full_name: Rethmeier, Michael
last_name: Rethmeier
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: Schmolke T, Brunner-Schwer C, Biegler M, Rethmeier M, Meschut G. On Welding
of High-Strength Steels Using Laser Beam Welding and Resistance Spot Weld Bonding
with Emphasis on Seam Leak Tightness . Journal of Manufacturing and Materials
Processing. 2023;7(3). doi:10.3390/jmmp7030116
apa: Schmolke, T., Brunner-Schwer, C., Biegler, M., Rethmeier, M., & Meschut,
G. (2023). On Welding of High-Strength Steels Using Laser Beam Welding and Resistance
Spot Weld Bonding with Emphasis on Seam Leak Tightness . Journal of Manufacturing
and Materials Processing, 7(3). https://doi.org/10.3390/jmmp7030116
bibtex: '@article{Schmolke_Brunner-Schwer_Biegler_Rethmeier_Meschut_2023, title={On
Welding of High-Strength Steels Using Laser Beam Welding and Resistance Spot Weld
Bonding with Emphasis on Seam Leak Tightness }, volume={7}, DOI={10.3390/jmmp7030116},
number={3}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI},
author={Schmolke, Tobias and Brunner-Schwer, Christian and Biegler, Max and Rethmeier,
Michael and Meschut, Gerson}, year={2023} }'
chicago: Schmolke, Tobias, Christian Brunner-Schwer, Max Biegler, Michael Rethmeier,
and Gerson Meschut. “On Welding of High-Strength Steels Using Laser Beam Welding
and Resistance Spot Weld Bonding with Emphasis on Seam Leak Tightness .” Journal
of Manufacturing and Materials Processing 7, no. 3 (2023). https://doi.org/10.3390/jmmp7030116.
ieee: 'T. Schmolke, C. Brunner-Schwer, M. Biegler, M. Rethmeier, and G. Meschut,
“On Welding of High-Strength Steels Using Laser Beam Welding and Resistance Spot
Weld Bonding with Emphasis on Seam Leak Tightness ,” Journal of Manufacturing
and Materials Processing, vol. 7, no. 3, 2023, doi: 10.3390/jmmp7030116.'
mla: Schmolke, Tobias, et al. “On Welding of High-Strength Steels Using Laser Beam
Welding and Resistance Spot Weld Bonding with Emphasis on Seam Leak Tightness
.” Journal of Manufacturing and Materials Processing, vol. 7, no. 3, MDPI,
2023, doi:10.3390/jmmp7030116.
short: T. Schmolke, C. Brunner-Schwer, M. Biegler, M. Rethmeier, G. Meschut, Journal
of Manufacturing and Materials Processing 7 (2023).
date_created: 2023-06-19T13:25:26Z
date_updated: 2023-06-22T06:05:56Z
department:
- _id: '157'
doi: 10.3390/jmmp7030116
intvolume: ' 7'
issue: '3'
language:
- iso: eng
publication: Journal of Manufacturing and Materials Processing
publication_status: published
publisher: MDPI
quality_controlled: '1'
status: public
title: 'On Welding of High-Strength Steels Using Laser Beam Welding and Resistance
Spot Weld Bonding with Emphasis on Seam Leak Tightness '
type: journal_article
user_id: '44759'
volume: 7
year: '2023'
...
---
_id: '45757'
abstract:
- lang: eng
text: "AbstractThree prominent low order implicit
time integration schemes are the first order implicit Euler-method, the second
order trapezoidal rule and the second order Ellsiepen method. Its advantages are
stability and comparatively low computational cost, however, they require the
solution of a nonlinear system of equations. This paper presents a general approach
for the construction of third order Runge–Kutta methods by embedding the above
mentioned implicit schemes into the class of ELDIRK-methods. These will be defined
to have an Explicit Last stage in the general Butcher
array of Diagonal Implicit Runge–Kutta (DIRK) methods,
with the consequence, that no additional system of equations must be solved. The
main results—valid also for non-linear ordinary differential equations—are as
follows: Two extra function calculations are required in order to embed the implicit
Euler-method and one extra function calculation is required for the trapezoidal-rule
and the Ellsiepen method, in order to obtain the third order properties, respectively.
Two numerical examples are concerned with a parachute with viscous damping and
a two-dimensional laser beam simulation. Here, we verify the higher order convergence
behaviours of the proposed new ELDIRK-methods, and its successful performances
for asymptotically exact global error estimation of so-called reversed embedded
RK-method are shown.\r\n"
author:
- first_name: Rolf
full_name: Mahnken, Rolf
id: '335'
last_name: Mahnken
citation:
ama: Mahnken R. Derivation of third order Runge–Kutta methods (ELDIRK) by embedding
of lower order implicit time integration schemes for local and global error estimation.
Computational Mechanics. Published online 2023. doi:10.1007/s00466-023-02347-2
apa: Mahnken, R. (2023). Derivation of third order Runge–Kutta methods (ELDIRK)
by embedding of lower order implicit time integration schemes for local and global
error estimation. Computational Mechanics. https://doi.org/10.1007/s00466-023-02347-2
bibtex: '@article{Mahnken_2023, title={Derivation of third order Runge–Kutta methods
(ELDIRK) by embedding of lower order implicit time integration schemes for local
and global error estimation}, DOI={10.1007/s00466-023-02347-2},
journal={Computational Mechanics}, publisher={Springer Science and Business Media
LLC}, author={Mahnken, Rolf}, year={2023} }'
chicago: Mahnken, Rolf. “Derivation of Third Order Runge–Kutta Methods (ELDIRK)
by Embedding of Lower Order Implicit Time Integration Schemes for Local and Global
Error Estimation.” Computational Mechanics, 2023. https://doi.org/10.1007/s00466-023-02347-2.
ieee: 'R. Mahnken, “Derivation of third order Runge–Kutta methods (ELDIRK) by embedding
of lower order implicit time integration schemes for local and global error estimation,”
Computational Mechanics, 2023, doi: 10.1007/s00466-023-02347-2.'
mla: Mahnken, Rolf. “Derivation of Third Order Runge–Kutta Methods (ELDIRK) by Embedding
of Lower Order Implicit Time Integration Schemes for Local and Global Error Estimation.”
Computational Mechanics, Springer Science and Business Media LLC, 2023,
doi:10.1007/s00466-023-02347-2.
short: R. Mahnken, Computational Mechanics (2023).
date_created: 2023-06-23T06:47:36Z
date_updated: 2023-06-23T06:48:42Z
department:
- _id: '9'
- _id: '154'
- _id: '321'
doi: 10.1007/s00466-023-02347-2
keyword:
- Applied Mathematics
- Computational Mathematics
- Computational Theory and Mathematics
- Mechanical Engineering
- Ocean Engineering
- Computational Mechanics
language:
- iso: eng
publication: Computational Mechanics
publication_identifier:
issn:
- 0178-7675
- 1432-0924
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Derivation of third order Runge–Kutta methods (ELDIRK) by embedding of lower
order implicit time integration schemes for local and global error estimation
type: journal_article
user_id: '335'
year: '2023'
...
---
_id: '45782'
abstract:
- lang: eng
text: The development of automotive components with reduced greenhouse gas
(GHG) emissions is needed to reduce overall vehicle emissions. Life Cycle Engineering
(LCE) based on Life Cycle Assessment (LCA) supports this by providing holistic
information and improvement potentials regarding eco-efficient products. Key factors
influencing LCAs of automotive components, such as material production, will change
in the future. First approaches for integrating future scenarios for these key
factors into LCE already exist, but they only consider a limited number of parameters
and scenarios. This work aims to develop a method that can be practically applied
in the industry for integrating prospective LCAs (pLCA) into the LCE of automotive
components, considering relevant parameters and consistent scenarios. Therefore,
pLCA methods are further developed to investigate the influence of future scenarios
on the GHG emissions of automotive components. The practical application is demonstrated
for a vehicle component with different design options. This paper shows that different
development paths of the foreground and background system can shift the ecological
optimum of design alternatives. Therefore, future pathways of relevant parameters
must be considered comprehensively to reduce GHG emissions of future vehicles.
This work contributes to the methodological and practical integration of pLCA
into automotive development processes and provides quantitative results.
article_number: '10041'
author:
- first_name: Julian
full_name: Grenz, Julian
last_name: Grenz
- first_name: Moritz
full_name: Ostermann, Moritz
id: '44763'
last_name: Ostermann
orcid: https://orcid.org/0000-0003-1146-0443
- first_name: Karoline
full_name: Käsewieter, Karoline
last_name: Käsewieter
- first_name: Felipe
full_name: Cerdas, Felipe
last_name: Cerdas
- first_name: Thorsten
full_name: Marten, Thorsten
id: '338'
last_name: Marten
- first_name: Christoph
full_name: Herrmann, Christoph
last_name: Herrmann
- first_name: Thomas
full_name: Tröster, Thomas
id: '553'
last_name: Tröster
citation:
ama: Grenz J, Ostermann M, Käsewieter K, et al. Integrating Prospective LCA in the
Development of Automotive Components. Sustainability. 2023;15(13). doi:10.3390/su151310041
apa: Grenz, J., Ostermann, M., Käsewieter, K., Cerdas, F., Marten, T., Herrmann,
C., & Tröster, T. (2023). Integrating Prospective LCA in the Development of
Automotive Components. Sustainability, 15(13), Article 10041. https://doi.org/10.3390/su151310041
bibtex: '@article{Grenz_Ostermann_Käsewieter_Cerdas_Marten_Herrmann_Tröster_2023,
title={Integrating Prospective LCA in the Development of Automotive Components},
volume={15}, DOI={10.3390/su151310041},
number={1310041}, journal={Sustainability}, publisher={MDPI AG}, author={Grenz,
Julian and Ostermann, Moritz and Käsewieter, Karoline and Cerdas, Felipe and Marten,
Thorsten and Herrmann, Christoph and Tröster, Thomas}, year={2023} }'
chicago: Grenz, Julian, Moritz Ostermann, Karoline Käsewieter, Felipe Cerdas, Thorsten
Marten, Christoph Herrmann, and Thomas Tröster. “Integrating Prospective LCA in
the Development of Automotive Components.” Sustainability 15, no. 13 (2023).
https://doi.org/10.3390/su151310041.
ieee: 'J. Grenz et al., “Integrating Prospective LCA in the Development of
Automotive Components,” Sustainability, vol. 15, no. 13, Art. no. 10041,
2023, doi: 10.3390/su151310041.'
mla: Grenz, Julian, et al. “Integrating Prospective LCA in the Development of Automotive
Components.” Sustainability, vol. 15, no. 13, 10041, MDPI AG, 2023, doi:10.3390/su151310041.
short: J. Grenz, M. Ostermann, K. Käsewieter, F. Cerdas, T. Marten, C. Herrmann,
T. Tröster, Sustainability 15 (2023).
date_created: 2023-06-27T06:35:20Z
date_updated: 2023-06-27T06:39:47Z
department:
- _id: '9'
- _id: '321'
- _id: '149'
doi: 10.3390/su151310041
intvolume: ' 15'
issue: '13'
keyword:
- prospective LCA
- life cycle engineering (LCE)
- lightweight design
- automotive components
- body parts
- circular economy
- steel
- aluminum
- hybrid materials
- fiber metal laminates
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.mdpi.com/2071-1050/15/13/10041
oa: '1'
publication: Sustainability
publication_identifier:
issn:
- 2071-1050
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
related_material:
link:
- relation: supplementary_material
url: ' https://www.mdpi.com/article/10.3390/su151310041/s1'
status: public
title: Integrating Prospective LCA in the Development of Automotive Components
type: journal_article
user_id: '44763'
volume: 15
year: '2023'
...
---
_id: '45868'
abstract:
- lang: eng
text: Perfect vector vortex beams (PVVBs) have attracted considerable interest due
to their peculiar optical features. PVVBs are typically generated through the
superposition of perfect vortex beams, which suffer from the limited number of
topological charges (TCs). Furthermore, dynamic control of PVVBs is desirable
and has not been reported. We propose and experimentally demonstrate hybrid grafted
perfect vector vortex beams (GPVVBs) and their dynamic control. Hybrid GPVVBs
are generated through the superposition of grafted perfect vortex beams with a
multifunctional metasurface. The generated hybrid GPVVBs possess spatially variant
rates of polarization change due to the involvement of more TCs. Each hybrid GPVVB
includes different GPVVBs in the same beam, adding more design flexibility. Moreover,
these beams are dynamically controlled with a rotating half waveplate. The generated
dynamic GPVVBs may find applications in the fields where dynamic control is in
high demand, including optical encryption, dense data communication, and multiple
particle manipulation.
article_number: '3915'
author:
- first_name: Hammad
full_name: Ahmed, Hammad
last_name: Ahmed
- first_name: Muhammad Afnan
full_name: Ansari, Muhammad Afnan
last_name: Ansari
- first_name: Yan
full_name: Li, Yan
last_name: Li
- first_name: Thomas
full_name: Zentgraf, Thomas
id: '30525'
last_name: Zentgraf
orcid: 0000-0002-8662-1101
- first_name: Muhammad Qasim
full_name: Mehmood, Muhammad Qasim
last_name: Mehmood
- first_name: Xianzhong
full_name: Chen, Xianzhong
last_name: Chen
citation:
ama: Ahmed H, Ansari MA, Li Y, Zentgraf T, Mehmood MQ, Chen X. Dynamic control of
hybrid grafted perfect vector vortex beams. Nature Communications. 2023;14(1).
doi:10.1038/s41467-023-39599-8
apa: Ahmed, H., Ansari, M. A., Li, Y., Zentgraf, T., Mehmood, M. Q., & Chen,
X. (2023). Dynamic control of hybrid grafted perfect vector vortex beams. Nature
Communications, 14(1), Article 3915. https://doi.org/10.1038/s41467-023-39599-8
bibtex: '@article{Ahmed_Ansari_Li_Zentgraf_Mehmood_Chen_2023, title={Dynamic control
of hybrid grafted perfect vector vortex beams}, volume={14}, DOI={10.1038/s41467-023-39599-8},
number={13915}, journal={Nature Communications}, publisher={Springer Science and
Business Media LLC}, author={Ahmed, Hammad and Ansari, Muhammad Afnan and Li,
Yan and Zentgraf, Thomas and Mehmood, Muhammad Qasim and Chen, Xianzhong}, year={2023}
}'
chicago: Ahmed, Hammad, Muhammad Afnan Ansari, Yan Li, Thomas Zentgraf, Muhammad
Qasim Mehmood, and Xianzhong Chen. “Dynamic Control of Hybrid Grafted Perfect
Vector Vortex Beams.” Nature Communications 14, no. 1 (2023). https://doi.org/10.1038/s41467-023-39599-8.
ieee: 'H. Ahmed, M. A. Ansari, Y. Li, T. Zentgraf, M. Q. Mehmood, and X. Chen, “Dynamic
control of hybrid grafted perfect vector vortex beams,” Nature Communications,
vol. 14, no. 1, Art. no. 3915, 2023, doi: 10.1038/s41467-023-39599-8.'
mla: Ahmed, Hammad, et al. “Dynamic Control of Hybrid Grafted Perfect Vector Vortex
Beams.” Nature Communications, vol. 14, no. 1, 3915, Springer Science and
Business Media LLC, 2023, doi:10.1038/s41467-023-39599-8.
short: H. Ahmed, M.A. Ansari, Y. Li, T. Zentgraf, M.Q. Mehmood, X. Chen, Nature
Communications 14 (2023).
date_created: 2023-07-06T06:34:37Z
date_updated: 2023-07-06T06:42:10Z
ddc:
- '530'
department:
- _id: '15'
- _id: '230'
- _id: '289'
- _id: '623'
doi: 10.1038/s41467-023-39599-8
file:
- access_level: closed
content_type: application/pdf
creator: zentgraf
date_created: 2023-07-06T06:40:28Z
date_updated: 2023-07-06T06:40:28Z
file_id: '45869'
file_name: NatureCommun_Ahmed_2023.pdf
file_size: 4341041
relation: main_file
success: 1
file_date_updated: 2023-07-06T06:40:28Z
has_accepted_license: '1'
intvolume: ' 14'
issue: '1'
keyword:
- General Physics and Astronomy
- General Biochemistry
- Genetics and Molecular Biology
- General Chemistry
- Multidisciplinary
language:
- iso: eng
main_file_link:
- open_access: '1'
oa: '1'
publication: Nature Communications
publication_identifier:
issn:
- 2041-1723
publication_status: published
publisher: Springer Science and Business Media LLC
quality_controlled: '1'
status: public
title: Dynamic control of hybrid grafted perfect vector vortex beams
type: journal_article
user_id: '30525'
volume: 14
year: '2023'
...
---
_id: '45674'
citation:
ama: Papenbrock M, Tophinke D, eds. Politisches Graffiti. Vol 24. V&R
unipress; 2023.
apa: Politisches Graffiti. (2023). In M. Papenbrock & D. Tophinke (Eds.), Kunst
und Politik (Vol. 24). V&R unipress.
bibtex: '@book{Papenbrock_Tophinke_2023, title={Politisches Graffiti}, volume={24},
journal={Kunst und Politik}, publisher={V&R unipress}, year={2023} }'
chicago: Papenbrock, Martin, and Doris Tophinke, eds. Politisches Graffiti.
Kunst und Politik. Vol. 24. V&R unipress, 2023.
ieee: M. Papenbrock and D. Tophinke, Eds., Politisches Graffiti, vol. 24.
V&R unipress, 2023.
mla: Papenbrock, Martin, and Doris Tophinke, editors. “Politisches Graffiti.” Kunst
und Politik, vol. 24, V&R unipress, 2023.
short: M. Papenbrock, D. Tophinke, eds., Politisches Graffiti, V&R unipress,
2023.
date_created: 2023-06-20T14:21:51Z
date_updated: 2023-07-20T13:06:21Z
department:
- _id: '5'
- _id: '115'
editor:
- first_name: Martin
full_name: Papenbrock, Martin
last_name: Papenbrock
- first_name: Doris
full_name: Tophinke, Doris
id: '16277'
last_name: Tophinke
intvolume: ' 24'
language:
- iso: ger
project:
- _id: '104'
grant_number: '289287267'
name: 'INGRID: INGRID: Informationssystem Graffiti in Deutschland'
publication: Kunst und Politik
publication_status: published
publisher: V&R unipress
quality_controlled: '1'
status: public
title: Politisches Graffiti
type: journal_editor
user_id: '16277'
volume: 24
year: '2023'
...
---
_id: '46138'
abstract:
- lang: eng
text: This work reports a fully guided setup for single-mode squeezing on
integrated titanium-indiffused periodically poled nonlinear resonators. A continuous-wave
laser beam is delivered and the squeezed field is collected by single-mode fibers;
up to −3.17(9) dB of useful squeezing is available in fibers. To showcase the
usefulness of such a fiber-coupled device, we applied the generated squeezed light
in a fiber-based phase sensing experiment, showing a quantum enhancement in the
signal-to-noise ratio of 0.35 dB. Moreover, our investigation of the effect of
photorefraction on the cavity resonance condition suggests that it causes system
instabilities at high powers.
article_number: '2999'
article_type: original
author:
- first_name: Renato
full_name: Domeneguetti, Renato
last_name: Domeneguetti
- first_name: Michael
full_name: Stefszky, Michael
id: '42777'
last_name: Stefszky
- first_name: Harald
full_name: Herrmann, Harald
id: '216'
last_name: Herrmann
- first_name: Christine
full_name: Silberhorn, Christine
id: '26263'
last_name: Silberhorn
- first_name: Ulrik L.
full_name: Andersen, Ulrik L.
last_name: Andersen
- first_name: Jonas S.
full_name: Neergaard-Nielsen, Jonas S.
last_name: Neergaard-Nielsen
- first_name: Tobias
full_name: Gehring, Tobias
last_name: Gehring
citation:
ama: Domeneguetti R, Stefszky M, Herrmann H, et al. Fully guided and phase locked
Ti:PPLN waveguide squeezing for applications in quantum sensing. Optics Letters.
2023;48(11). doi:10.1364/ol.486654
apa: Domeneguetti, R., Stefszky, M., Herrmann, H., Silberhorn, C., Andersen, U.
L., Neergaard-Nielsen, J. S., & Gehring, T. (2023). Fully guided and phase
locked Ti:PPLN waveguide squeezing for applications in quantum sensing. Optics
Letters, 48(11), Article 2999. https://doi.org/10.1364/ol.486654
bibtex: '@article{Domeneguetti_Stefszky_Herrmann_Silberhorn_Andersen_Neergaard-Nielsen_Gehring_2023,
title={Fully guided and phase locked Ti:PPLN waveguide squeezing for applications
in quantum sensing}, volume={48}, DOI={10.1364/ol.486654},
number={112999}, journal={Optics Letters}, publisher={Optica Publishing Group},
author={Domeneguetti, Renato and Stefszky, Michael and Herrmann, Harald and Silberhorn,
Christine and Andersen, Ulrik L. and Neergaard-Nielsen, Jonas S. and Gehring,
Tobias}, year={2023} }'
chicago: Domeneguetti, Renato, Michael Stefszky, Harald Herrmann, Christine Silberhorn,
Ulrik L. Andersen, Jonas S. Neergaard-Nielsen, and Tobias Gehring. “Fully Guided
and Phase Locked Ti:PPLN Waveguide Squeezing for Applications in Quantum Sensing.”
Optics Letters 48, no. 11 (2023). https://doi.org/10.1364/ol.486654.
ieee: 'R. Domeneguetti et al., “Fully guided and phase locked Ti:PPLN waveguide
squeezing for applications in quantum sensing,” Optics Letters, vol. 48,
no. 11, Art. no. 2999, 2023, doi: 10.1364/ol.486654.'
mla: Domeneguetti, Renato, et al. “Fully Guided and Phase Locked Ti:PPLN Waveguide
Squeezing for Applications in Quantum Sensing.” Optics Letters, vol. 48,
no. 11, 2999, Optica Publishing Group, 2023, doi:10.1364/ol.486654.
short: R. Domeneguetti, M. Stefszky, H. Herrmann, C. Silberhorn, U.L. Andersen,
J.S. Neergaard-Nielsen, T. Gehring, Optics Letters 48 (2023).
date_created: 2023-07-25T10:35:24Z
date_updated: 2023-07-25T10:58:05Z
department:
- _id: '230'
- _id: '623'
- _id: '288'
doi: 10.1364/ol.486654
intvolume: ' 48'
issue: '11'
keyword:
- Atomic and Molecular Physics
- and Optics
language:
- iso: eng
project:
- _id: '218'
name: 'UNIQORN: UNIQORN - Affordable Quantum Communication for Everyone - EU Quantum
Flagship Project'
publication: Optics Letters
publication_identifier:
issn:
- 0146-9592
- 1539-4794
publication_status: published
publisher: Optica Publishing Group
quality_controlled: '1'
status: public
title: Fully guided and phase locked Ti:PPLN waveguide squeezing for applications
in quantum sensing
type: journal_article
user_id: '216'
volume: 48
year: '2023'
...
---
_id: '46119'
article_number: '014503'
author:
- first_name: Luis
full_name: Altenkort, Luis
last_name: Altenkort
- first_name: Alexander M.
full_name: Eller, Alexander M.
last_name: Eller
- first_name: Anthony
full_name: Francis, Anthony
last_name: Francis
- first_name: Olaf
full_name: Kaczmarek, Olaf
last_name: Kaczmarek
- first_name: Lukas
full_name: Mazur, Lukas
id: '90492'
last_name: Mazur
orcid: ' 0000-0001-6304-7082'
- first_name: Guy D.
full_name: Moore, Guy D.
last_name: Moore
- first_name: Hai-Tao
full_name: Shu, Hai-Tao
last_name: Shu
citation:
ama: Altenkort L, Eller AM, Francis A, et al. Viscosity of pure-glue QCD from the
lattice. Physical Review D. 2023;108(1). doi:10.1103/physrevd.108.014503
apa: Altenkort, L., Eller, A. M., Francis, A., Kaczmarek, O., Mazur, L., Moore,
G. D., & Shu, H.-T. (2023). Viscosity of pure-glue QCD from the lattice. Physical
Review D, 108(1), Article 014503. https://doi.org/10.1103/physrevd.108.014503
bibtex: '@article{Altenkort_Eller_Francis_Kaczmarek_Mazur_Moore_Shu_2023, title={Viscosity
of pure-glue QCD from the lattice}, volume={108}, DOI={10.1103/physrevd.108.014503},
number={1014503}, journal={Physical Review D}, publisher={American Physical Society
(APS)}, author={Altenkort, Luis and Eller, Alexander M. and Francis, Anthony and
Kaczmarek, Olaf and Mazur, Lukas and Moore, Guy D. and Shu, Hai-Tao}, year={2023}
}'
chicago: Altenkort, Luis, Alexander M. Eller, Anthony Francis, Olaf Kaczmarek, Lukas
Mazur, Guy D. Moore, and Hai-Tao Shu. “Viscosity of Pure-Glue QCD from the Lattice.”
Physical Review D 108, no. 1 (2023). https://doi.org/10.1103/physrevd.108.014503.
ieee: 'L. Altenkort et al., “Viscosity of pure-glue QCD from the lattice,”
Physical Review D, vol. 108, no. 1, Art. no. 014503, 2023, doi: 10.1103/physrevd.108.014503.'
mla: Altenkort, Luis, et al. “Viscosity of Pure-Glue QCD from the Lattice.” Physical
Review D, vol. 108, no. 1, 014503, American Physical Society (APS), 2023,
doi:10.1103/physrevd.108.014503.
short: L. Altenkort, A.M. Eller, A. Francis, O. Kaczmarek, L. Mazur, G.D. Moore,
H.-T. Shu, Physical Review D 108 (2023).
date_created: 2023-07-24T10:54:18Z
date_updated: 2023-07-26T09:23:32Z
department:
- _id: '27'
doi: 10.1103/physrevd.108.014503
intvolume: ' 108'
issue: '1'
language:
- iso: eng
publication: Physical Review D
publication_identifier:
issn:
- 2470-0010
- 2470-0029
publication_status: published
publisher: American Physical Society (APS)
quality_controlled: '1'
status: public
title: Viscosity of pure-glue QCD from the lattice
type: journal_article
user_id: '90492'
volume: 108
year: '2023'
...
---
_id: '38041'
abstract:
- lang: eng
text: "While FPGA accelerator boards and their respective high-level design
tools are maturing, there is still a lack of multi-FPGA applications, libraries,
and not least, benchmarks and reference implementations towards sustained HPC
usage of these devices. As in the early days of GPUs in HPC, for workloads that
can reasonably be decoupled into loosely coupled working sets, multi-accelerator
support can be achieved by using standard communication interfaces like MPI on
the host side. However, for performance and productivity, some applications can
profit from a tighter coupling of the accelerators. FPGAs offer unique opportunities
here when extending the dataflow characteristics to their communication interfaces.\r\n
\ In this work, we extend the HPCC FPGA benchmark suite by multi-FPGA
support and three missing benchmarks that particularly characterize or stress
inter-device communication: b_eff, PTRANS, and LINPACK. With all benchmarks implemented
for current boards with Intel and Xilinx FPGAs, we established a baseline for
multi-FPGA performance. Additionally, for the communication-centric benchmarks,
we explored the potential of direct FPGA-to-FPGA communication with a circuit-switched
inter-FPGA network that is currently only available for one of the boards. The
evaluation with parallel execution on up to 26 FPGA boards makes use of one of
the largest academic FPGA installations."
author:
- first_name: Marius
full_name: Meyer, Marius
id: '40778'
last_name: Meyer
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
ama: Meyer M, Kenter T, Plessl C. Multi-FPGA Designs and Scaling of HPC Challenge
Benchmarks via MPI and Circuit-Switched Inter-FPGA Networks. ACM Transactions
on Reconfigurable Technology and Systems. Published online 2023. doi:10.1145/3576200
apa: Meyer, M., Kenter, T., & Plessl, C. (2023). Multi-FPGA Designs and Scaling
of HPC Challenge Benchmarks via MPI and Circuit-Switched Inter-FPGA Networks.
ACM Transactions on Reconfigurable Technology and Systems. https://doi.org/10.1145/3576200
bibtex: '@article{Meyer_Kenter_Plessl_2023, title={Multi-FPGA Designs and Scaling
of HPC Challenge Benchmarks via MPI and Circuit-Switched Inter-FPGA Networks},
DOI={10.1145/3576200}, journal={ACM
Transactions on Reconfigurable Technology and Systems}, publisher={Association
for Computing Machinery (ACM)}, author={Meyer, Marius and Kenter, Tobias and Plessl,
Christian}, year={2023} }'
chicago: Meyer, Marius, Tobias Kenter, and Christian Plessl. “Multi-FPGA Designs
and Scaling of HPC Challenge Benchmarks via MPI and Circuit-Switched Inter-FPGA
Networks.” ACM Transactions on Reconfigurable Technology and Systems, 2023.
https://doi.org/10.1145/3576200.
ieee: 'M. Meyer, T. Kenter, and C. Plessl, “Multi-FPGA Designs and Scaling of HPC
Challenge Benchmarks via MPI and Circuit-Switched Inter-FPGA Networks,” ACM
Transactions on Reconfigurable Technology and Systems, 2023, doi: 10.1145/3576200.'
mla: Meyer, Marius, et al. “Multi-FPGA Designs and Scaling of HPC Challenge Benchmarks
via MPI and Circuit-Switched Inter-FPGA Networks.” ACM Transactions on Reconfigurable
Technology and Systems, Association for Computing Machinery (ACM), 2023, doi:10.1145/3576200.
short: M. Meyer, T. Kenter, C. Plessl, ACM Transactions on Reconfigurable Technology
and Systems (2023).
date_created: 2023-01-23T08:40:42Z
date_updated: 2023-07-28T08:02:05Z
department:
- _id: '27'
- _id: '518'
doi: 10.1145/3576200
keyword:
- General Computer Science
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://dl.acm.org/doi/10.1145/3576200
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
- _id: '4'
name: 'SFB 901 - C: SFB 901 - Project Area C'
- _id: '1'
grant_number: '160364472'
name: 'SFB 901: SFB 901'
- _id: '14'
grant_number: '160364472'
name: 'SFB 901 - C2: SFB 901 - Subproject C2'
publication: ACM Transactions on Reconfigurable Technology and Systems
publication_identifier:
issn:
- 1936-7406
- 1936-7414
publication_status: published
publisher: Association for Computing Machinery (ACM)
quality_controlled: '1'
status: public
title: Multi-FPGA Designs and Scaling of HPC Challenge Benchmarks via MPI and Circuit-Switched
Inter-FPGA Networks
type: journal_article
user_id: '24135'
year: '2023'
...
---
_id: '43228'
abstract:
- lang: eng
text: "The computation of electron repulsion integrals (ERIs) over Gaussian-type
orbitals (GTOs) is a challenging problem in quantum-mechanics-based atomistic
simulations. In practical simulations, several trillions of ERIs may have to be\r\ncomputed
for every time step.\r\nIn this work, we investigate FPGAs as accelerators for
the ERI computation. We use template parameters, here within the Intel oneAPI
tool flow, to create customized designs for 256 different ERI quartet classes,
based on their orbitals. To maximize data reuse, all intermediates are buffered
in FPGA on-chip memory with customized layout. The pre-calculation of intermediates
also helps to overcome data dependencies caused by multi-dimensional recurrence\r\nrelations.
The involved loop structures are partially or even fully unrolled for high throughput
of FPGA kernels. Furthermore, a lossy compression algorithm utilizing arbitrary
bitwidth integers is integrated in the FPGA kernels. To our\r\nbest knowledge,
this is the first work on ERI computation on FPGAs that supports more than just
the single most basic quartet class. Also, the integration of ERI computation
and compression it a novelty that is not even covered by CPU or GPU libraries
so far.\r\nOur evaluation shows that using 16-bit integer for the ERI compression,
the fastest FPGA kernels exceed the performance of 10 GERIS ($10 \\times 10^9$
ERIs per second) on one Intel Stratix 10 GX 2800 FPGA, with maximum absolute errors
around $10^{-7}$ - $10^{-5}$ Hartree. The measured throughput can be accurately
explained by a performance model. The FPGA kernels deployed on 2 FPGAs outperform
similar computations using the widely used libint reference on a two-socket server
with 40 Xeon Gold 6148 CPU cores of the same process technology by factors up
to 6.0x and on a new two-socket server with 128 EPYC 7713 CPU cores by up to 1.9x."
author:
- first_name: Xin
full_name: Wu, Xin
id: '77439'
last_name: Wu
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Robert
full_name: Schade, Robert
id: '75963'
last_name: Schade
orcid: 0000-0002-6268-539
- first_name: Thomas
full_name: Kühne, Thomas
id: '49079'
last_name: Kühne
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
ama: 'Wu X, Kenter T, Schade R, Kühne T, Plessl C. Computing and Compressing Electron
Repulsion Integrals on FPGAs. In: 2023 IEEE 31st Annual International Symposium
on Field-Programmable Custom Computing Machines (FCCM). ; 2023:162-173. doi:10.1109/FCCM57271.2023.00026'
apa: Wu, X., Kenter, T., Schade, R., Kühne, T., & Plessl, C. (2023). Computing
and Compressing Electron Repulsion Integrals on FPGAs. 2023 IEEE 31st Annual
International Symposium on Field-Programmable Custom Computing Machines (FCCM),
162–173. https://doi.org/10.1109/FCCM57271.2023.00026
bibtex: '@inproceedings{Wu_Kenter_Schade_Kühne_Plessl_2023, title={Computing and
Compressing Electron Repulsion Integrals on FPGAs}, DOI={10.1109/FCCM57271.2023.00026},
booktitle={2023 IEEE 31st Annual International Symposium on Field-Programmable
Custom Computing Machines (FCCM)}, author={Wu, Xin and Kenter, Tobias and Schade,
Robert and Kühne, Thomas and Plessl, Christian}, year={2023}, pages={162–173}
}'
chicago: Wu, Xin, Tobias Kenter, Robert Schade, Thomas Kühne, and Christian Plessl.
“Computing and Compressing Electron Repulsion Integrals on FPGAs.” In 2023
IEEE 31st Annual International Symposium on Field-Programmable Custom Computing
Machines (FCCM), 162–73, 2023. https://doi.org/10.1109/FCCM57271.2023.00026.
ieee: 'X. Wu, T. Kenter, R. Schade, T. Kühne, and C. Plessl, “Computing and Compressing
Electron Repulsion Integrals on FPGAs,” in 2023 IEEE 31st Annual International
Symposium on Field-Programmable Custom Computing Machines (FCCM), 2023, pp.
162–173, doi: 10.1109/FCCM57271.2023.00026.'
mla: Wu, Xin, et al. “Computing and Compressing Electron Repulsion Integrals on
FPGAs.” 2023 IEEE 31st Annual International Symposium on Field-Programmable
Custom Computing Machines (FCCM), 2023, pp. 162–73, doi:10.1109/FCCM57271.2023.00026.
short: 'X. Wu, T. Kenter, R. Schade, T. Kühne, C. Plessl, in: 2023 IEEE 31st Annual
International Symposium on Field-Programmable Custom Computing Machines (FCCM),
2023, pp. 162–173.'
date_created: 2023-03-30T11:15:40Z
date_updated: 2023-08-02T15:05:42Z
department:
- _id: '27'
- _id: '518'
doi: 10.1109/FCCM57271.2023.00026
external_id:
arxiv:
- '2303.13632'
language:
- iso: eng
main_file_link:
- url: https://ieeexplore.ieee.org/document/10171537
page: 162-173
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: 2023 IEEE 31st Annual International Symposium on Field-Programmable Custom
Computing Machines (FCCM)
quality_controlled: '1'
status: public
title: Computing and Compressing Electron Repulsion Integrals on FPGAs
type: conference
user_id: '75963'
year: '2023'
...
---
_id: '45361'
abstract:
- lang: eng
text: The non-orthogonal local submatrix method applied to electronic structure–based
molecular dynamics simulations is shown to exceed 1.1 EFLOP/s in FP16/FP32-mixed
floating-point arithmetic when using 4400 NVIDIA A100 GPUs of the Perlmutter system.
This is enabled by a modification of the original method that pushes the sustained
fraction of the peak performance to about 80%. Example calculations are performed
for SARS-CoV-2 spike proteins with up to 83 million atoms.
article_number: '109434202311776'
article_type: original
author:
- first_name: Robert
full_name: Schade, Robert
id: '75963'
last_name: Schade
orcid: 0000-0002-6268-539
- first_name: Tobias
full_name: Kenter, Tobias
id: '3145'
last_name: Kenter
- first_name: Hossam
full_name: Elgabarty, Hossam
id: '60250'
last_name: Elgabarty
orcid: 0000-0002-4945-1481
- first_name: Michael
full_name: Lass, Michael
id: '24135'
last_name: Lass
orcid: 0000-0002-5708-7632
- first_name: Thomas
full_name: Kühne, Thomas
id: '49079'
last_name: Kühne
- first_name: Christian
full_name: Plessl, Christian
id: '16153'
last_name: Plessl
orcid: 0000-0001-5728-9982
citation:
ama: Schade R, Kenter T, Elgabarty H, Lass M, Kühne T, Plessl C. Breaking the exascale
barrier for the electronic structure problem in ab-initio molecular dynamics.
The International Journal of High Performance Computing Applications. Published
online 2023. doi:10.1177/10943420231177631
apa: Schade, R., Kenter, T., Elgabarty, H., Lass, M., Kühne, T., & Plessl, C.
(2023). Breaking the exascale barrier for the electronic structure problem in
ab-initio molecular dynamics. The International Journal of High Performance
Computing Applications, Article 109434202311776. https://doi.org/10.1177/10943420231177631
bibtex: '@article{Schade_Kenter_Elgabarty_Lass_Kühne_Plessl_2023, title={Breaking
the exascale barrier for the electronic structure problem in ab-initio molecular
dynamics}, DOI={10.1177/10943420231177631},
number={109434202311776}, journal={The International Journal of High Performance
Computing Applications}, publisher={SAGE Publications}, author={Schade, Robert
and Kenter, Tobias and Elgabarty, Hossam and Lass, Michael and Kühne, Thomas and
Plessl, Christian}, year={2023} }'
chicago: Schade, Robert, Tobias Kenter, Hossam Elgabarty, Michael Lass, Thomas Kühne,
and Christian Plessl. “Breaking the Exascale Barrier for the Electronic Structure
Problem in Ab-Initio Molecular Dynamics.” The International Journal of High
Performance Computing Applications, 2023. https://doi.org/10.1177/10943420231177631.
ieee: 'R. Schade, T. Kenter, H. Elgabarty, M. Lass, T. Kühne, and C. Plessl, “Breaking
the exascale barrier for the electronic structure problem in ab-initio molecular
dynamics,” The International Journal of High Performance Computing Applications,
Art. no. 109434202311776, 2023, doi: 10.1177/10943420231177631.'
mla: Schade, Robert, et al. “Breaking the Exascale Barrier for the Electronic Structure
Problem in Ab-Initio Molecular Dynamics.” The International Journal of High
Performance Computing Applications, 109434202311776, SAGE Publications, 2023,
doi:10.1177/10943420231177631.
short: R. Schade, T. Kenter, H. Elgabarty, M. Lass, T. Kühne, C. Plessl, The International
Journal of High Performance Computing Applications (2023).
date_created: 2023-05-30T09:19:09Z
date_updated: 2023-08-02T15:04:53Z
department:
- _id: '27'
- _id: '518'
doi: 10.1177/10943420231177631
keyword:
- Hardware and Architecture
- Theoretical Computer Science
- Software
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://journals.sagepub.com/doi/10.1177/10943420231177631
oa: '1'
project:
- _id: '52'
name: 'PC2: Computing Resources Provided by the Paderborn Center for Parallel Computing'
publication: The International Journal of High Performance Computing Applications
publication_identifier:
issn:
- 1094-3420
- 1741-2846
publication_status: published
publisher: SAGE Publications
quality_controlled: '1'
status: public
title: Breaking the exascale barrier for the electronic structure problem in ab-initio
molecular dynamics
type: journal_article
user_id: '75963'
year: '2023'
...
---
_id: '45661'
abstract:
- lang: eng
text: "Effect chain modelling is a method for creating information\r\nmodels for
impact analyses of changes in system elements. For\r\nthe estimation of change
propagation, dependencies between\r\nrequirements must be detected. The high number
of require-\r\nment dependencies in the engineering of complex technical\r\nsystems
results in the need for automation. In a study, it was\r\nshown that transformer
models (BERT) are suitable for the\r\nautomated dependency analysis of requirements.
However,\r\nthere are currently deficits in the applicability of the models\r\nfor
different projects without an extensive and heterogeneous\r\ntraining database.
This paper investigates how active learning\r\ncan be used to train BERT models
(active-BERT) in order to\r\nincrease the performance of the models for classifying
requi-\r\nrement dependencies of projects with heterogeneous require-\r\nments.
The results show that the performance of the models\r\nincreases significantly
through active learning. Through active-\r\nBERT, engineers are enabled to model
effect chains efficiently\r\nand to handle requirement changes effectively."
author:
- first_name: Iris
full_name: Gräßler, Iris
id: '47565'
last_name: Gräßler
orcid: 0000-0001-5765-971X
- first_name: Daniel
full_name: Preuß, Daniel
id: '40253'
last_name: Preuß
citation:
ama: 'Gräßler I, Preuß D. Automatisierte Abhängigkeitsanalyse von Anforderungen
zur Wirkkettenmodellierung. In: Hölzle K, Kreimeyer M, Roth D, Maier T, Riedel
O, eds. Stuttgarter Symposium Für Produktentwicklung SSP 2023. Fraunhofer
IAO; 2023.'
apa: Gräßler, I., & Preuß, D. (2023). Automatisierte Abhängigkeitsanalyse von
Anforderungen zur Wirkkettenmodellierung. In K. Hölzle, M. Kreimeyer, D. Roth,
T. Maier, & O. Riedel (Eds.), Stuttgarter Symposium für Produktentwicklung
SSP 2023. Fraunhofer IAO.
bibtex: '@inproceedings{Gräßler_Preuß_2023, place={Stuttgart}, title={Automatisierte
Abhängigkeitsanalyse von Anforderungen zur Wirkkettenmodellierung}, booktitle={Stuttgarter
Symposium für Produktentwicklung SSP 2023}, publisher={Fraunhofer IAO}, author={Gräßler,
Iris and Preuß, Daniel}, editor={Hölzle, Katharina and Kreimeyer, Matthias and
Roth, Daniel and Maier, Thomas and Riedel, Oliver}, year={2023} }'
chicago: 'Gräßler, Iris, and Daniel Preuß. “Automatisierte Abhängigkeitsanalyse
von Anforderungen Zur Wirkkettenmodellierung.” In Stuttgarter Symposium Für
Produktentwicklung SSP 2023, edited by Katharina Hölzle, Matthias Kreimeyer,
Daniel Roth, Thomas Maier, and Oliver Riedel. Stuttgart: Fraunhofer IAO, 2023.'
ieee: I. Gräßler and D. Preuß, “Automatisierte Abhängigkeitsanalyse von Anforderungen
zur Wirkkettenmodellierung,” in Stuttgarter Symposium für Produktentwicklung
SSP 2023, Stuttgart, 2023.
mla: Gräßler, Iris, and Daniel Preuß. “Automatisierte Abhängigkeitsanalyse von Anforderungen
Zur Wirkkettenmodellierung.” Stuttgarter Symposium Für Produktentwicklung SSP
2023, edited by Katharina Hölzle et al., Fraunhofer IAO, 2023.
short: 'I. Gräßler, D. Preuß, in: K. Hölzle, M. Kreimeyer, D. Roth, T. Maier, O.
Riedel (Eds.), Stuttgarter Symposium Für Produktentwicklung SSP 2023, Fraunhofer
IAO, Stuttgart, 2023.'
conference:
end_date: 2023-05-25
location: Stuttgart
name: Stuttgarter Symposium für Produktentwicklung SSP 2023
start_date: 2023-05-25
date_created: 2023-06-19T08:58:35Z
date_updated: 2023-08-07T17:16:42Z
department:
- _id: '152'
editor:
- first_name: Katharina
full_name: Hölzle, Katharina
last_name: Hölzle
- first_name: Matthias
full_name: Kreimeyer, Matthias
last_name: Kreimeyer
- first_name: Daniel
full_name: Roth, Daniel
last_name: Roth
- first_name: Thomas
full_name: Maier, Thomas
last_name: Maier
- first_name: Oliver
full_name: Riedel, Oliver
last_name: Riedel
language:
- iso: eng
place: Stuttgart
publication: Stuttgarter Symposium für Produktentwicklung SSP 2023
publication_identifier:
issn:
- 2364-4885
publication_status: published
publisher: Fraunhofer IAO
quality_controlled: '1'
status: public
title: Automatisierte Abhängigkeitsanalyse von Anforderungen zur Wirkkettenmodellierung
type: conference
user_id: '40253'
year: '2023'
...
---
_id: '29240'
abstract:
- lang: eng
text: "The principle of least action is one of the most fundamental physical principle.
It says that among all possible motions connecting two points in a phase space,
the system will exhibit those motions which extremise an action functional. Many
qualitative features of dynamical systems, such as the presence of conservation
laws and energy balance equations, are related to the existence of an action functional.
Incorporating variational structure into learning algorithms for dynamical systems
is, therefore, crucial in order to make sure that the learned model shares important
features with the exact physical system. In this paper we show how to incorporate
variational principles into trajectory predictions of learned dynamical systems.
The novelty of this work is that (1) our technique relies only on discrete position
data of observed trajectories. Velocities or conjugate momenta do not need to
be observed or approximated and no prior knowledge about the form of the variational
principle is assumed. Instead, they are recovered using backward error analysis.
(2) Moreover, our technique compensates discretisation errors when trajectories
are computed from the learned system. This is important when moderate to large
step-sizes are used and high accuracy is required. For this,\r\nwe introduce and
rigorously analyse the concept of inverse modified Lagrangians by developing an
inverse version of variational backward error analysis. (3) Finally, we introduce
a method to perform system identification from position observations only, based
on variational backward error analysis."
article_type: original
author:
- first_name: Sina
full_name: Ober-Blöbaum, Sina
id: '16494'
last_name: Ober-Blöbaum
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
citation:
ama: Ober-Blöbaum S, Offen C. Variational Learning of Euler–Lagrange Dynamics from
Data. Journal of Computational and Applied Mathematics. 2023;421:114780.
doi:10.1016/j.cam.2022.114780
apa: Ober-Blöbaum, S., & Offen, C. (2023). Variational Learning of Euler–Lagrange
Dynamics from Data. Journal of Computational and Applied Mathematics, 421,
114780. https://doi.org/10.1016/j.cam.2022.114780
bibtex: '@article{Ober-Blöbaum_Offen_2023, title={Variational Learning of Euler–Lagrange
Dynamics from Data}, volume={421}, DOI={10.1016/j.cam.2022.114780},
journal={Journal of Computational and Applied Mathematics}, publisher={Elsevier},
author={Ober-Blöbaum, Sina and Offen, Christian}, year={2023}, pages={114780}
}'
chicago: 'Ober-Blöbaum, Sina, and Christian Offen. “Variational Learning of Euler–Lagrange
Dynamics from Data.” Journal of Computational and Applied Mathematics 421
(2023): 114780. https://doi.org/10.1016/j.cam.2022.114780.'
ieee: 'S. Ober-Blöbaum and C. Offen, “Variational Learning of Euler–Lagrange Dynamics
from Data,” Journal of Computational and Applied Mathematics, vol. 421,
p. 114780, 2023, doi: 10.1016/j.cam.2022.114780.'
mla: Ober-Blöbaum, Sina, and Christian Offen. “Variational Learning of Euler–Lagrange
Dynamics from Data.” Journal of Computational and Applied Mathematics,
vol. 421, Elsevier, 2023, p. 114780, doi:10.1016/j.cam.2022.114780.
short: S. Ober-Blöbaum, C. Offen, Journal of Computational and Applied Mathematics
421 (2023) 114780.
date_created: 2022-01-11T13:24:00Z
date_updated: 2023-08-10T08:42:39Z
ddc:
- '510'
department:
- _id: '636'
doi: 10.1016/j.cam.2022.114780
external_id:
arxiv:
- '2112.12619'
file:
- access_level: open_access
content_type: application/pdf
creator: coffen
date_created: 2022-06-28T15:25:50Z
date_updated: 2022-06-28T15:25:50Z
description: |-
The principle of least action is one of the most fundamental physical principle. It says that among all possible motions
connecting two points in a phase space, the system will exhibit those motions which extremise an action functional.
Many qualitative features of dynamical systems, such as the presence of conservation laws and energy balance equa-
tions, are related to the existence of an action functional. Incorporating variational structure into learning algorithms
for dynamical systems is, therefore, crucial in order to make sure that the learned model shares important features
with the exact physical system. In this paper we show how to incorporate variational principles into trajectory predic-
tions of learned dynamical systems. The novelty of this work is that (1) our technique relies only on discrete position
data of observed trajectories. Velocities or conjugate momenta do not need to be observed or approximated and no
prior knowledge about the form of the variational principle is assumed. Instead, they are recovered using backward
error analysis. (2) Moreover, our technique compensates discretisation errors when trajectories are computed from the
learned system. This is important when moderate to large step-sizes are used and high accuracy is required. For this,
we introduce and rigorously analyse the concept of inverse modified Lagrangians by developing an inverse version of
variational backward error analysis. (3) Finally, we introduce a method to perform system identification from position
observations only, based on variational backward error analysis.
file_id: '32274'
file_name: ShadowLagrangian_revision1_journal_style_arxiv.pdf
file_size: 3640770
relation: main_file
title: Variational Learning of Euler–Lagrange Dynamics from Data
file_date_updated: 2022-06-28T15:25:50Z
has_accepted_license: '1'
intvolume: ' 421'
keyword:
- Lagrangian learning
- variational backward error analysis
- modified Lagrangian
- variational integrators
- physics informed learning
language:
- iso: eng
oa: '1'
page: '114780'
publication: Journal of Computational and Applied Mathematics
publication_identifier:
issn:
- 0377-0427
publication_status: epub_ahead
publisher: Elsevier
quality_controlled: '1'
related_material:
link:
- relation: software
url: https://github.com/Christian-Offen/LagrangianShadowIntegration
status: public
title: Variational Learning of Euler–Lagrange Dynamics from Data
type: journal_article
user_id: '85279'
volume: 421
year: '2023'
...
---
_id: '29236'
abstract:
- lang: eng
text: The numerical solution of an ordinary differential equation can be interpreted
as the exact solution of a nearby modified equation. Investigating the behaviour
of numerical solutions by analysing the modified equation is known as backward
error analysis. If the original and modified equation share structural properties,
then the exact and approximate solution share geometric features such as the existence
of conserved quantities. Conjugate symplectic methods preserve a modified symplectic
form and a modified Hamiltonian when applied to a Hamiltonian system. We show
how a blended version of variational and symplectic techniques can be used to
compute modified symplectic and Hamiltonian structures. In contrast to other approaches,
our backward error analysis method does not rely on an ansatz but computes the
structures systematically, provided that a variational formulation of the method
is known. The technique is illustrated on the example of symmetric linear multistep
methods with matrix coefficients.
article_type: original
author:
- first_name: Robert
full_name: McLachlan, Robert
last_name: McLachlan
- first_name: Christian
full_name: Offen, Christian
id: '85279'
last_name: Offen
orcid: 0000-0002-5940-8057
citation:
ama: McLachlan R, Offen C. Backward error analysis for conjugate symplectic methods.
Journal of Geometric Mechanics. 2023;15(1):98-115. doi:10.3934/jgm.2023005
apa: McLachlan, R., & Offen, C. (2023). Backward error analysis for conjugate
symplectic methods. Journal of Geometric Mechanics, 15(1), 98–115.
https://doi.org/10.3934/jgm.2023005
bibtex: '@article{McLachlan_Offen_2023, title={Backward error analysis for conjugate
symplectic methods}, volume={15}, DOI={10.3934/jgm.2023005},
number={1}, journal={Journal of Geometric Mechanics}, publisher={AIMS Press},
author={McLachlan, Robert and Offen, Christian}, year={2023}, pages={98–115} }'
chicago: 'McLachlan, Robert, and Christian Offen. “Backward Error Analysis for Conjugate
Symplectic Methods.” Journal of Geometric Mechanics 15, no. 1 (2023): 98–115.
https://doi.org/10.3934/jgm.2023005.'
ieee: 'R. McLachlan and C. Offen, “Backward error analysis for conjugate symplectic
methods,” Journal of Geometric Mechanics, vol. 15, no. 1, pp. 98–115, 2023,
doi: 10.3934/jgm.2023005.'
mla: McLachlan, Robert, and Christian Offen. “Backward Error Analysis for Conjugate
Symplectic Methods.” Journal of Geometric Mechanics, vol. 15, no. 1, AIMS
Press, 2023, pp. 98–115, doi:10.3934/jgm.2023005.
short: R. McLachlan, C. Offen, Journal of Geometric Mechanics 15 (2023) 98–115.
date_created: 2022-01-11T12:48:39Z
date_updated: 2023-08-10T08:40:30Z
ddc:
- '510'
department:
- _id: '636'
doi: 10.3934/jgm.2023005
external_id:
arxiv:
- '2201.03911'
file:
- access_level: open_access
content_type: application/pdf
creator: coffen
date_created: 2022-08-12T16:48:59Z
date_updated: 2022-08-12T16:48:59Z
description: The numerical solution of an ordinary differential equation can be
interpreted as the exact solution of a nearby modified equation. Investigating
the behaviour of numerical solutions by analysing the modified equation is known
as backward error analysis. If the original and modified equation share structural
properties, then the exact and approximate solution share geometric features such
as the existence of conserved quantities. Conjugate symplectic methods preserve
a modified symplectic form and a modified Hamiltonian when applied to a Hamiltonian
system. We show how a blended version of variational and symplectic techniques
can be used to compute modified symplectic and Hamiltonian structures. In contrast
to other approaches, our backward error analysis method does not rely on an ansatz
but computes the structures systematically, provided that a variational formulation
of the method is known. The technique is illustrated on the example of symmetric
linear multistep methods with matrix coefficients.
file_id: '32801'
file_name: BEA_MultiStep_Matrix.pdf
file_size: 827030
relation: main_file
title: Backward error analysis for conjugate symplectic methods
file_date_updated: 2022-08-12T16:48:59Z
has_accepted_license: '1'
intvolume: ' 15'
issue: '1'
keyword:
- variational integrators
- backward error analysis
- Euler--Lagrange equations
- multistep methods
- conjugate symplectic methods
language:
- iso: eng
oa: '1'
page: 98-115
publication: Journal of Geometric Mechanics
publication_status: published
publisher: AIMS Press
quality_controlled: '1'
related_material:
link:
- relation: software
url: https://github.com/Christian-Offen/BEAConjugateSymplectic
status: public
title: Backward error analysis for conjugate symplectic methods
type: journal_article
user_id: '85279'
volume: 15
year: '2023'
...
---
_id: '46502'
author:
- first_name: Iris
full_name: Gräßler, Iris
id: '47565'
last_name: Gräßler
orcid: 0000-0001-5765-971X
- first_name: Dominik
full_name: Wiechel, Dominik
id: '67161'
last_name: Wiechel
citation:
ama: 'Gräßler I, Wiechel D. Customized impact analyses for technical engineering
changes. In: 2023 18th Annual System of Systems Engineering Conference (SoSe).
IEEE; 2023. doi:10.1109/sose59841.2023.10178484'
apa: Gräßler, I., & Wiechel, D. (2023). Customized impact analyses for technical
engineering changes. 2023 18th Annual System of Systems Engineering Conference
(SoSe). 18th Annual System of Systems Engineering Conference (SoSe), Lille.
https://doi.org/10.1109/sose59841.2023.10178484
bibtex: '@inproceedings{Gräßler_Wiechel_2023, title={Customized impact analyses
for technical engineering changes}, DOI={10.1109/sose59841.2023.10178484},
booktitle={2023 18th Annual System of Systems Engineering Conference (SoSe)},
publisher={IEEE}, author={Gräßler, Iris and Wiechel, Dominik}, year={2023} }'
chicago: Gräßler, Iris, and Dominik Wiechel. “Customized Impact Analyses for Technical
Engineering Changes.” In 2023 18th Annual System of Systems Engineering Conference
(SoSe). IEEE, 2023. https://doi.org/10.1109/sose59841.2023.10178484.
ieee: 'I. Gräßler and D. Wiechel, “Customized impact analyses for technical engineering
changes,” presented at the 18th Annual System of Systems Engineering Conference
(SoSe), Lille, 2023, doi: 10.1109/sose59841.2023.10178484.'
mla: Gräßler, Iris, and Dominik Wiechel. “Customized Impact Analyses for Technical
Engineering Changes.” 2023 18th Annual System of Systems Engineering Conference
(SoSe), IEEE, 2023, doi:10.1109/sose59841.2023.10178484.
short: 'I. Gräßler, D. Wiechel, in: 2023 18th Annual System of Systems Engineering
Conference (SoSe), IEEE, 2023.'
conference:
end_date: 2023-06-16
location: Lille
name: 18th Annual System of Systems Engineering Conference (SoSe)
start_date: 2023-06-14
date_created: 2023-08-15T14:13:40Z
date_updated: 2023-08-15T14:18:56Z
department:
- _id: '152'
doi: 10.1109/sose59841.2023.10178484
language:
- iso: eng
publication: 2023 18th Annual System of Systems Engineering Conference (SoSe)
publication_status: published
publisher: IEEE
quality_controlled: '1'
status: public
title: Customized impact analyses for technical engineering changes
type: conference
user_id: '67161'
year: '2023'
...
---
_id: '46503'
abstract:
- lang: eng
text: "\r\nPurpose\r\nThe
purpose of this study is to investigate the manufacturability of Fe-3Si lattice
structures and the resulting mechanical properties. This study could lead to the
successful processing of squirrel cage conductors (a lattice structure by design)
of an induction motor by additive manufacturing in the future.\r\n\r\n\r\nDesign/methodology/approach\r\nThe
compression behaviour of two lattice structures where struts are arranged in a
face-centred cubic position and vertical edges (FCCZ), and struts are placed at
body-centred cubic (BCC) positions, prepared by laser powder bed fusion (LPBF),
is explored. The experimental investigations are supported by finite element method
(FEM) simulations.\r\n\r\n\r\nFindings\r\nThe
FCCZ lattice structure presents a peak in the stress-strain curve, whereas the
BCC lattice structure manifests a plateau. The vertical struts aligned along the
compression direction lead to a significant increase in the load-carrying ability
of FCCZ lattice structures compared to BCC lattice structures. This results in
a peak in the stress-strain curve. However, the BCC lattice structure presents
the bending of struts with diagonal struts carrying the major loads with struts
near the faceplate receiving the least load. A high concentration of geometrically
necessary dislocations (GNDs) near the grain boundaries along cell formation is
observed in the microstructure.\r\n\r\n\r\nOriginality/value\r\nTo
the best of the authors’ knowledge, this is the first study on additive manufacturing
of Fe-3Si lattice structures. Currently, there are no investigations in the literature
on the manufacturability and mechanical properties of Fe-3Si lattice structures.\r\n"
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
citation:
ama: Pramanik S, Hoyer K-P, Schaper M. Experimental and finite element method investigation
on the compression behaviour of FCCZ and BCC lattice structures of additively
manufactured Fe-3Si samples. Rapid Prototyping Journal. 2023;29(6):1257-1269.
doi:10.1108/rpj-06-2022-0190
apa: Pramanik, S., Hoyer, K.-P., & Schaper, M. (2023). Experimental and finite
element method investigation on the compression behaviour of FCCZ and BCC lattice
structures of additively manufactured Fe-3Si samples. Rapid Prototyping Journal,
29(6), 1257–1269. https://doi.org/10.1108/rpj-06-2022-0190
bibtex: '@article{Pramanik_Hoyer_Schaper_2023, title={Experimental and finite element
method investigation on the compression behaviour of FCCZ and BCC lattice structures
of additively manufactured Fe-3Si samples}, volume={29}, DOI={10.1108/rpj-06-2022-0190},
number={6}, journal={Rapid Prototyping Journal}, publisher={Emerald}, author={Pramanik,
Sudipta and Hoyer, Kay-Peter and Schaper, Mirko}, year={2023}, pages={1257–1269}
}'
chicago: 'Pramanik, Sudipta, Kay-Peter Hoyer, and Mirko Schaper. “Experimental and
Finite Element Method Investigation on the Compression Behaviour of FCCZ and BCC
Lattice Structures of Additively Manufactured Fe-3Si Samples.” Rapid Prototyping
Journal 29, no. 6 (2023): 1257–69. https://doi.org/10.1108/rpj-06-2022-0190.'
ieee: 'S. Pramanik, K.-P. Hoyer, and M. Schaper, “Experimental and finite element
method investigation on the compression behaviour of FCCZ and BCC lattice structures
of additively manufactured Fe-3Si samples,” Rapid Prototyping Journal,
vol. 29, no. 6, pp. 1257–1269, 2023, doi: 10.1108/rpj-06-2022-0190.'
mla: Pramanik, Sudipta, et al. “Experimental and Finite Element Method Investigation
on the Compression Behaviour of FCCZ and BCC Lattice Structures of Additively
Manufactured Fe-3Si Samples.” Rapid Prototyping Journal, vol. 29, no. 6,
Emerald, 2023, pp. 1257–69, doi:10.1108/rpj-06-2022-0190.
short: S. Pramanik, K.-P. Hoyer, M. Schaper, Rapid Prototyping Journal 29 (2023)
1257–1269.
date_created: 2023-08-16T06:20:42Z
date_updated: 2023-08-16T06:29:57Z
department:
- _id: '9'
- _id: '158'
doi: 10.1108/rpj-06-2022-0190
intvolume: ' 29'
issue: '6'
keyword:
- Industrial and Manufacturing Engineering
- Mechanical Engineering
language:
- iso: eng
page: 1257-1269
publication: Rapid Prototyping Journal
publication_identifier:
issn:
- 1355-2546
- 1355-2546
publication_status: published
publisher: Emerald
quality_controlled: '1'
status: public
title: Experimental and finite element method investigation on the compression behaviour
of FCCZ and BCC lattice structures of additively manufactured Fe-3Si samples
type: journal_article
user_id: '48411'
volume: 29
year: '2023'
...
---
_id: '46507'
author:
- first_name: Sudipta
full_name: Pramanik, Sudipta
last_name: Pramanik
- first_name: Dennis
full_name: Milaege, Dennis
last_name: Milaege
- first_name: Maxwell
full_name: Hein, Maxwell
id: '52771'
last_name: Hein
orcid: 0000-0002-3732-2236
- first_name: Anatolii
full_name: Andreiev, Anatolii
id: '50215'
last_name: Andreiev
- first_name: Mirko
full_name: Schaper, Mirko
id: '43720'
last_name: Schaper
- first_name: Kay-Peter
full_name: Hoyer, Kay-Peter
id: '48411'
last_name: Hoyer
citation:
ama: Pramanik S, Milaege D, Hein M, Andreiev A, Schaper M, Hoyer K-P. An Experimental
and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures. Advanced Engineering Materials.
2023;25(14). doi:10.1002/adem.202201850
apa: Pramanik, S., Milaege, D., Hein, M., Andreiev, A., Schaper, M., & Hoyer,
K.-P. (2023). An Experimental and Computational Modeling Study on Additively Manufactured
Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures. Advanced
Engineering Materials, 25(14). https://doi.org/10.1002/adem.202201850
bibtex: '@article{Pramanik_Milaege_Hein_Andreiev_Schaper_Hoyer_2023, title={An Experimental
and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures}, volume={25}, DOI={10.1002/adem.202201850},
number={14}, journal={Advanced Engineering Materials}, publisher={Wiley}, author={Pramanik,
Sudipta and Milaege, Dennis and Hein, Maxwell and Andreiev, Anatolii and Schaper,
Mirko and Hoyer, Kay-Peter}, year={2023} }'
chicago: Pramanik, Sudipta, Dennis Milaege, Maxwell Hein, Anatolii Andreiev, Mirko
Schaper, and Kay-Peter Hoyer. “An Experimental and Computational Modeling Study
on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice
Structures.” Advanced Engineering Materials 25, no. 14 (2023). https://doi.org/10.1002/adem.202201850.
ieee: 'S. Pramanik, D. Milaege, M. Hein, A. Andreiev, M. Schaper, and K.-P. Hoyer,
“An Experimental and Computational Modeling Study on Additively Manufactured Micro‐Architectured
Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures,” Advanced Engineering Materials,
vol. 25, no. 14, 2023, doi: 10.1002/adem.202201850.'
mla: Pramanik, Sudipta, et al. “An Experimental and Computational Modeling Study
on Additively Manufactured Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice
Structures.” Advanced Engineering Materials, vol. 25, no. 14, Wiley, 2023,
doi:10.1002/adem.202201850.
short: S. Pramanik, D. Milaege, M. Hein, A. Andreiev, M. Schaper, K.-P. Hoyer, Advanced
Engineering Materials 25 (2023).
date_created: 2023-08-16T06:27:19Z
date_updated: 2023-08-16T06:29:36Z
department:
- _id: '9'
- _id: '158'
doi: 10.1002/adem.202201850
intvolume: ' 25'
issue: '14'
keyword:
- Condensed Matter Physics
- General Materials Science
language:
- iso: eng
publication: Advanced Engineering Materials
publication_identifier:
issn:
- 1438-1656
- 1527-2648
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: An Experimental and Computational Modeling Study on Additively Manufactured
Micro‐Architectured Ti–24Nb–4Zr–8Sn Hollow‐Strut Lattice Structures
type: journal_article
user_id: '48411'
volume: 25
year: '2023'
...