---
_id: '57742'
article_type: original
author:
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Robert
full_name: Beck, Robert
id: '38279'
last_name: Beck
orcid: 0000-0001-9056-4528
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
citation:
ama: Böhnke M, Bielak CR, Beck R, Bobbert M, Meschut G. Development of a friction
model for the numerical simulation of clinching processes. Friction. Published
online 2024. doi:10.26599/frict.2025.9441052
apa: Böhnke, M., Bielak, C. R., Beck, R., Bobbert, M., & Meschut, G. (2024).
Development of a friction model for the numerical simulation of clinching processes.
Friction. https://doi.org/10.26599/frict.2025.9441052
bibtex: '@article{Böhnke_Bielak_Beck_Bobbert_Meschut_2024, title={Development of
a friction model for the numerical simulation of clinching processes}, DOI={10.26599/frict.2025.9441052},
journal={Friction}, publisher={Tsinghua University Press}, author={Böhnke, Max
and Bielak, Christian Roman and Beck, Robert and Bobbert, Mathias and Meschut,
Gerson}, year={2024} }'
chicago: Böhnke, Max, Christian Roman Bielak, Robert Beck, Mathias Bobbert, and
Gerson Meschut. “Development of a Friction Model for the Numerical Simulation
of Clinching Processes.” Friction, 2024. https://doi.org/10.26599/frict.2025.9441052.
ieee: 'M. Böhnke, C. R. Bielak, R. Beck, M. Bobbert, and G. Meschut, “Development
of a friction model for the numerical simulation of clinching processes,” Friction,
2024, doi: 10.26599/frict.2025.9441052.'
mla: Böhnke, Max, et al. “Development of a Friction Model for the Numerical Simulation
of Clinching Processes.” Friction, Tsinghua University Press, 2024, doi:10.26599/frict.2025.9441052.
short: M. Böhnke, C.R. Bielak, R. Beck, M. Bobbert, G. Meschut, Friction (2024).
date_created: 2024-12-11T14:45:57Z
date_updated: 2026-05-12T14:08:38Z
department:
- _id: '157'
doi: 10.26599/frict.2025.9441052
language:
- iso: eng
project:
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: Friction
publication_identifier:
issn:
- 2223-7690
- 2223-7704
publication_status: published
publisher: Tsinghua University Press
quality_controlled: '1'
status: public
title: Development of a friction model for the numerical simulation of clinching processes
type: journal_article
user_id: '7850'
year: '2024'
...
---
_id: '59585'
abstract:
- lang: eng
text: Similar to bulk metal forming, clinch joining is characterised by large plastic
deformations and a variety of different 3D stress states, including severe compression.
However, inherent to plastic forming is the nucleation and growth of defects,
whose detrimental effects on the material behaviour can be described by continuum
damage models and eventually lead to material failure. As the damage evolution
strongly depends on the stress state, a stress-state-dependent model is utilised
to correctly track the accumulation. To formulate and parameterise this model,
besides classical experiments, so-called modified punch tests are also integrated
herein to enhance the calibration of the failure model by capturing a larger range
of stress states and metal-forming-specific loading conditions. Moreover, when
highly ductile materials are considered, such as the dual-phase steel HCT590X
and the aluminium alloy EN AW-6014 T4 investigated here, strong necking and localisation
might occur prior to fracture. This can alter the stress state and affect the
actual strain at failure. This influence is captured by coupling plasticity and
damage to incorporate the damage-induced softening effect. Its relative importance
is shown by conducting inverse parameter identifications to determine damage and
failure parameters for both mentioned ductile metals based on up to 12 different
experiments.
article_number: '157'
author:
- first_name: Johannes
full_name: Friedlein, Johannes
last_name: Friedlein
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Malte Christian
full_name: Schlichter, Malte Christian
id: '61977'
last_name: Schlichter
- first_name: Mathias
full_name: Bobbert, Mathias
id: '7850'
last_name: Bobbert
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Julia
full_name: Mergheim, Julia
last_name: Mergheim
- first_name: Paul
full_name: Steinmann, Paul
last_name: Steinmann
citation:
ama: Friedlein J, Böhnke M, Schlichter MC, et al. Material Parameter Identification
for a Stress-State-Dependent Ductile Damage and Failure Model Applied to Clinch
Joining. Journal of Manufacturing and Materials Processing. 2024;8(4).
doi:10.3390/jmmp8040157
apa: Friedlein, J., Böhnke, M., Schlichter, M. C., Bobbert, M., Meschut, G., Mergheim,
J., & Steinmann, P. (2024). Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining. Journal of Manufacturing
and Materials Processing, 8(4), Article 157. https://doi.org/10.3390/jmmp8040157
bibtex: '@article{Friedlein_Böhnke_Schlichter_Bobbert_Meschut_Mergheim_Steinmann_2024,
title={Material Parameter Identification for a Stress-State-Dependent Ductile
Damage and Failure Model Applied to Clinch Joining}, volume={8}, DOI={10.3390/jmmp8040157},
number={4157}, journal={Journal of Manufacturing and Materials Processing}, publisher={MDPI
AG}, author={Friedlein, Johannes and Böhnke, Max and Schlichter, Malte Christian
and Bobbert, Mathias and Meschut, Gerson and Mergheim, Julia and Steinmann, Paul},
year={2024} }'
chicago: Friedlein, Johannes, Max Böhnke, Malte Christian Schlichter, Mathias Bobbert,
Gerson Meschut, Julia Mergheim, and Paul Steinmann. “Material Parameter Identification
for a Stress-State-Dependent Ductile Damage and Failure Model Applied to Clinch
Joining.” Journal of Manufacturing and Materials Processing 8, no. 4 (2024).
https://doi.org/10.3390/jmmp8040157.
ieee: 'J. Friedlein et al., “Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining,” Journal of Manufacturing
and Materials Processing, vol. 8, no. 4, Art. no. 157, 2024, doi: 10.3390/jmmp8040157.'
mla: Friedlein, Johannes, et al. “Material Parameter Identification for a Stress-State-Dependent
Ductile Damage and Failure Model Applied to Clinch Joining.” Journal of Manufacturing
and Materials Processing, vol. 8, no. 4, 157, MDPI AG, 2024, doi:10.3390/jmmp8040157.
short: J. Friedlein, M. Böhnke, M.C. Schlichter, M. Bobbert, G. Meschut, J. Mergheim,
P. Steinmann, Journal of Manufacturing and Materials Processing 8 (2024).
date_created: 2025-04-15T11:07:52Z
date_updated: 2026-05-13T13:53:29Z
department:
- _id: '157'
doi: 10.3390/jmmp8040157
intvolume: ' 8'
issue: '4'
language:
- iso: eng
project:
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
publication: Journal of Manufacturing and Materials Processing
publication_identifier:
issn:
- 2504-4494
publication_status: published
publisher: MDPI AG
quality_controlled: '1'
status: public
title: Material Parameter Identification for a Stress-State-Dependent Ductile Damage
and Failure Model Applied to Clinch Joining
type: journal_article
user_id: '61977'
volume: 8
year: '2024'
...
---
_id: '58215'
citation:
ama: "Bürgel C, Heiderich J, Koch C, Schlaak C, Visser J, eds. \tZeitschrift
Für Romanische Sprachen Und Ihre Didaktik. Vol Heft 18,1.; 2024."
apa: "Bürgel, C., Heiderich, J., Koch, C., Schlaak, C., & Visser, J. (Eds.).
(2024). \tZeitschrift für Romanische Sprachen und ihre Didaktik: Vol. Heft
18,1."
bibtex: "@book{Bürgel_Heiderich_Koch_Schlaak_Visser_2024, series={Zeitschrift für
Romanische Sprachen und ihre Didaktik}, title={\tZeitschrift für Romanische Sprachen
und ihre Didaktik}, volume={Heft 18,1}, year={2024}, collection={Zeitschrift für
Romanische Sprachen und ihre Didaktik} }"
chicago: "Bürgel, Christoph, Jens Heiderich, Corinna Koch, Claudia Schlaak, and
Judith Visser, eds. \tZeitschrift Für Romanische Sprachen Und Ihre Didaktik.
Vol. Heft 18,1. Zeitschrift Für Romanische Sprachen Und Ihre Didaktik, 2024."
ieee: "C. Bürgel, J. Heiderich, C. Koch, C. Schlaak, and J. Visser, Eds., \tZeitschrift
für Romanische Sprachen und ihre Didaktik, vol. Heft 18,1. 2024."
mla: "Bürgel, Christoph, et al., editors. \tZeitschrift Für Romanische Sprachen
Und Ihre Didaktik. 2024."
short: "C. Bürgel, J. Heiderich, C. Koch, C. Schlaak, J. Visser, eds., \tZeitschrift
Für Romanische Sprachen Und Ihre Didaktik, 2024."
date_created: 2025-01-16T14:17:38Z
date_updated: 2026-05-13T13:47:37Z
editor:
- first_name: Christoph
full_name: Bürgel, Christoph
id: '58448'
last_name: Bürgel
- first_name: 'Jens '
full_name: 'Heiderich, Jens '
last_name: Heiderich
- first_name: Corinna
full_name: Koch, Corinna
last_name: Koch
- first_name: Claudia
full_name: Schlaak, Claudia
last_name: Schlaak
- first_name: Judith
full_name: Visser, Judith
last_name: Visser
language:
- iso: eng
main_file_link:
- url: Paderborn
series_title: Zeitschrift für Romanische Sprachen und ihre Didaktik
status: public
title: "\tZeitschrift für Romanische Sprachen und ihre Didaktik"
type: book_editor
user_id: '43976'
volume: Heft 18,1
year: '2024'
...
---
_id: '65622'
citation:
ama: Bürgel C, Heiderich J, Koch C, Schlaak C, Visser J, eds. Zeitschrift Für
Romanische Sprachen Und Ihre Didaktik. Vol 18,2.; 2024.
apa: 'Bürgel, C., Heiderich, J., Koch, C., Schlaak, C., & Visser, J. (Eds.).
(2024). Zeitschrift für Romanische Sprachen und ihre Didaktik: Vol. 18,2.'
bibtex: '@book{Bürgel_Heiderich_Koch_Schlaak_Visser_2024, title={Zeitschrift für
Romanische Sprachen und ihre Didaktik}, volume={18,2}, year={2024} }'
chicago: Bürgel, Christoph, Jens Heiderich, Corinna Koch, Claudia Schlaak, and Judith
Visser, eds. Zeitschrift Für Romanische Sprachen Und Ihre Didaktik. Vol.
18,2, 2024.
ieee: C. Bürgel, J. Heiderich, C. Koch, C. Schlaak, and J. Visser, Eds., Zeitschrift
für Romanische Sprachen und ihre Didaktik, vol. 18,2. 2024.
mla: Bürgel, Christoph, et al., editors. Zeitschrift Für Romanische Sprachen
Und Ihre Didaktik. 2024.
short: C. Bürgel, J. Heiderich, C. Koch, C. Schlaak, J. Visser, eds., Zeitschrift
Für Romanische Sprachen Und Ihre Didaktik, 2024.
date_created: 2026-05-13T13:42:23Z
date_updated: 2026-05-13T13:50:43Z
editor:
- first_name: Christoph
full_name: Bürgel, Christoph
id: '58448'
last_name: Bürgel
- first_name: Jens
full_name: Heiderich, Jens
last_name: Heiderich
- first_name: Corinna
full_name: Koch, Corinna
last_name: Koch
- first_name: Claudia
full_name: Schlaak, Claudia
last_name: Schlaak
- first_name: Judith
full_name: Visser, Judith
last_name: Visser
language:
- iso: eng
status: public
title: Zeitschrift für Romanische Sprachen und ihre Didaktik
type: book_editor
user_id: '43976'
volume: 18,2
year: '2024'
...
---
_id: '50273'
abstract:
- lang: eng
text: "The Polynomial-Time Hierarchy ($\\mathsf{PH}$) is a staple of classical\r\ncomplexity
theory, with applications spanning randomized computation to circuit\r\nlower
bounds to ''quantum advantage'' analyses for near-term quantum computers.\r\nQuantumly,
however, despite the fact that at least \\emph{four} definitions of\r\nquantum
$\\mathsf{PH}$ exist, it has been challenging to prove analogues for\r\nthese
of even basic facts from $\\mathsf{PH}$. This work studies three\r\nquantum-verifier
based generalizations of $\\mathsf{PH}$, two of which are from\r\n[Gharibian,
Santha, Sikora, Sundaram, Yirka, 2022] and use classical strings\r\n($\\mathsf{QCPH}$)
and quantum mixed states ($\\mathsf{QPH}$) as proofs, and one\r\nof which is new
to this work, utilizing quantum pure states\r\n($\\mathsf{pureQPH}$) as proofs.
We first resolve several open problems from\r\n[GSSSY22], including a collapse
theorem and a Karp-Lipton theorem for\r\n$\\mathsf{QCPH}$. Then, for our new class
$\\mathsf{pureQPH}$, we show one-sided\r\nerror reduction for $\\mathsf{pureQPH}$,
as well as the first bounds relating\r\nthese quantum variants of $\\mathsf{PH}$,
namely $\\mathsf{QCPH}\\subseteq\r\n\\mathsf{pureQPH} \\subseteq \\mathsf{EXP}^{\\mathsf{PP}}$."
author:
- first_name: Avantika
full_name: Agarwal, Avantika
last_name: Agarwal
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Venkata
full_name: Koppula, Venkata
last_name: Koppula
- first_name: Dorian
full_name: Rudolph, Dorian
id: '57863'
last_name: Rudolph
citation:
ama: 'Agarwal A, Gharibian S, Koppula V, Rudolph D. Quantum Polynomial Hierarchies:
Karp-Lipton, error reduction, and lower bounds. In: Proceedings of 49th International
Symposium on Mathematical Foundations of Computer Science (MFCS). Vol 306.
; 2024:7-17. doi:10.4230/LIPIcs.MFCS.2024.7'
apa: 'Agarwal, A., Gharibian, S., Koppula, V., & Rudolph, D. (2024). Quantum
Polynomial Hierarchies: Karp-Lipton, error reduction, and lower bounds. Proceedings
of 49th International Symposium on Mathematical Foundations of Computer Science
(MFCS), 306(7), 7–17. https://doi.org/10.4230/LIPIcs.MFCS.2024.7'
bibtex: '@inproceedings{Agarwal_Gharibian_Koppula_Rudolph_2024, title={Quantum Polynomial
Hierarchies: Karp-Lipton, error reduction, and lower bounds}, volume={306}, DOI={10.4230/LIPIcs.MFCS.2024.7},
number={7}, booktitle={Proceedings of 49th International Symposium on Mathematical
Foundations of Computer Science (MFCS)}, author={Agarwal, Avantika and Gharibian,
Sevag and Koppula, Venkata and Rudolph, Dorian}, year={2024}, pages={7–17} }'
chicago: 'Agarwal, Avantika, Sevag Gharibian, Venkata Koppula, and Dorian Rudolph.
“Quantum Polynomial Hierarchies: Karp-Lipton, Error Reduction, and Lower Bounds.”
In Proceedings of 49th International Symposium on Mathematical Foundations
of Computer Science (MFCS), 306:7–17, 2024. https://doi.org/10.4230/LIPIcs.MFCS.2024.7.'
ieee: 'A. Agarwal, S. Gharibian, V. Koppula, and D. Rudolph, “Quantum Polynomial
Hierarchies: Karp-Lipton, error reduction, and lower bounds,” in Proceedings
of 49th International Symposium on Mathematical Foundations of Computer Science
(MFCS), 2024, vol. 306, no. 7, pp. 7–17, doi: 10.4230/LIPIcs.MFCS.2024.7.'
mla: 'Agarwal, Avantika, et al. “Quantum Polynomial Hierarchies: Karp-Lipton, Error
Reduction, and Lower Bounds.” Proceedings of 49th International Symposium
on Mathematical Foundations of Computer Science (MFCS), vol. 306, no. 7, 2024,
pp. 7–17, doi:10.4230/LIPIcs.MFCS.2024.7.'
short: 'A. Agarwal, S. Gharibian, V. Koppula, D. Rudolph, in: Proceedings of 49th
International Symposium on Mathematical Foundations of Computer Science (MFCS),
2024, pp. 7–17.'
date_created: 2024-01-07T20:09:32Z
date_updated: 2026-05-15T08:39:23Z
department:
- _id: '7'
- _id: '623'
doi: 10.4230/LIPIcs.MFCS.2024.7
external_id:
arxiv:
- '2401.01633'
intvolume: ' 306'
issue: '7'
language:
- iso: eng
page: 7-17
publication: Proceedings of 49th International Symposium on Mathematical Foundations
of Computer Science (MFCS)
publication_status: published
status: public
title: 'Quantum Polynomial Hierarchies: Karp-Lipton, error reduction, and lower bounds'
type: conference
user_id: '71541'
volume: 306
year: '2024'
...
---
_id: '50406'
abstract:
- lang: eng
text: "What is the power of polynomial-time quantum computation with access to an
NP\r\noracle? In this work, we focus on two fundamental tasks from the study of\r\nBoolean
satisfiability (SAT) problems: search-to-decision reductions, and\r\napproximate
counting. We first show that, in strong contrast to the classical\r\nsetting where
a poly-time Turing machine requires $\\Theta(n)$ queries to an NP\r\noracle to
compute a witness to a given SAT formula, quantumly $\\Theta(\\log n)$\r\nqueries
suffice. We then show this is tight in the black-box model - any\r\nquantum algorithm
with \"NP-like\" query access to a formula requires\r\n$\\Omega(\\log n)$ queries
to extract a solution with constant probability.\r\nMoving to approximate counting
of SAT solutions, by exploiting a quantum link\r\nbetween search-to-decision reductions
and approximate counting, we show that\r\nexisting classical approximate counting
algorithms are likely optimal. First,\r\nwe give a lower bound in the \"NP-like\"
black-box query setting: Approximate\r\ncounting requires $\\Omega(\\log n)$ queries,
even on a quantum computer. We then\r\ngive a \"white-box\" lower bound (i.e.
where the input formula is not hidden in\r\nthe oracle) - if there exists a randomized
poly-time classical or quantum\r\nalgorithm for approximate counting making $o(log
n)$ NP queries, then\r\n$\\text{BPP}^{\\text{NP}[o(n)]}$ contains a $\\text{P}^{\\text{NP}}$-complete\r\nproblem
if the algorithm is classical and $\\text{FBQP}^{\\text{NP}[o(n)]}$\r\ncontains
an $\\text{FP}^{\\text{NP}}$-complete problem if the algorithm is\r\nquantum."
author:
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
- first_name: Jonas
full_name: Kamminga, Jonas
last_name: Kamminga
citation:
ama: 'Gharibian S, Kamminga J. BQP, meet NP: Search-to-decision reductions and approximate
counting. In: Proceedings of 51st EATCS International Colloquium on Automata,
Languages and Programming (ICALP). Vol 297. ; 2024:1-19.'
apa: 'Gharibian, S., & Kamminga, J. (2024). BQP, meet NP: Search-to-decision
reductions and approximate counting. Proceedings of 51st EATCS International
Colloquium on Automata, Languages and Programming (ICALP), 297(70),
1–19.'
bibtex: '@inproceedings{Gharibian_Kamminga_2024, title={BQP, meet NP: Search-to-decision
reductions and approximate counting}, volume={297}, number={70}, booktitle={Proceedings
of 51st EATCS International Colloquium on Automata, Languages and Programming
(ICALP)}, author={Gharibian, Sevag and Kamminga, Jonas}, year={2024}, pages={1–19}
}'
chicago: 'Gharibian, Sevag, and Jonas Kamminga. “BQP, Meet NP: Search-to-Decision
Reductions and Approximate Counting.” In Proceedings of 51st EATCS International
Colloquium on Automata, Languages and Programming (ICALP), 297:1–19, 2024.'
ieee: 'S. Gharibian and J. Kamminga, “BQP, meet NP: Search-to-decision reductions
and approximate counting,” in Proceedings of 51st EATCS International Colloquium
on Automata, Languages and Programming (ICALP), 2024, vol. 297, no. 70, pp.
1–19.'
mla: 'Gharibian, Sevag, and Jonas Kamminga. “BQP, Meet NP: Search-to-Decision Reductions
and Approximate Counting.” Proceedings of 51st EATCS International Colloquium
on Automata, Languages and Programming (ICALP), vol. 297, no. 70, 2024, pp.
1–19.'
short: 'S. Gharibian, J. Kamminga, in: Proceedings of 51st EATCS International Colloquium
on Automata, Languages and Programming (ICALP), 2024, pp. 1–19.'
date_created: 2024-01-09T13:59:44Z
date_updated: 2026-05-15T08:41:59Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2401.03943'
intvolume: ' 297'
issue: '70'
language:
- iso: eng
page: 1-19
publication: Proceedings of 51st EATCS International Colloquium on Automata, Languages
and Programming (ICALP)
publication_status: published
status: public
title: 'BQP, meet NP: Search-to-decision reductions and approximate counting'
type: conference
user_id: '71541'
volume: 297
year: '2024'
...
---
_id: '56944'
abstract:
- lang: eng
text: "Quantum Max Cut (QMC), also known as the quantum anti-ferromagnetic\r\nHeisenberg
model, is a QMA-complete problem relevant to quantum many-body\r\nphysics and
computer science. Semidefinite programming relaxations have been\r\nfruitful in
designing theoretical approximation algorithms for QMC, but are\r\ncomputationally
expensive for systems beyond tens of qubits. We give a second\r\norder cone relaxation
for QMC, which optimizes over the set of mutually\r\nconsistent three-qubit reduced
density matrices. In combination with Pauli\r\nlevel-$1$ of the quantum Lasserre
hierarchy, the relaxation achieves an\r\napproximation ratio of $0.526$ to the
ground state energy. Our relaxation is\r\nsolvable on systems with hundreds of
qubits and paves the way to\r\ncomputationally efficient lower and upper bounds
on the ground state energy of\r\nlarge-scale quantum spin systems."
author:
- first_name: Felix
full_name: Huber, Felix
last_name: Huber
- first_name: Kevin
full_name: Thompson, Kevin
last_name: Thompson
- first_name: Ojas
full_name: Parekh, Ojas
last_name: Parekh
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
citation:
ama: Huber F, Thompson K, Parekh O, Gharibian S. Second order cone relaxations for
quantum Max Cut. arXiv:241104120. Published online 2024.
apa: Huber, F., Thompson, K., Parekh, O., & Gharibian, S. (2024). Second order
cone relaxations for quantum Max Cut. In arXiv:2411.04120.
bibtex: '@article{Huber_Thompson_Parekh_Gharibian_2024, title={Second order cone
relaxations for quantum Max Cut}, journal={arXiv:2411.04120}, author={Huber, Felix
and Thompson, Kevin and Parekh, Ojas and Gharibian, Sevag}, year={2024} }'
chicago: Huber, Felix, Kevin Thompson, Ojas Parekh, and Sevag Gharibian. “Second
Order Cone Relaxations for Quantum Max Cut.” ArXiv:2411.04120, 2024.
ieee: F. Huber, K. Thompson, O. Parekh, and S. Gharibian, “Second order cone relaxations
for quantum Max Cut,” arXiv:2411.04120. 2024.
mla: Huber, Felix, et al. “Second Order Cone Relaxations for Quantum Max Cut.” ArXiv:2411.04120,
2024.
short: F. Huber, K. Thompson, O. Parekh, S. Gharibian, ArXiv:2411.04120 (2024).
date_created: 2024-11-07T12:09:37Z
date_updated: 2026-05-15T08:41:38Z
department:
- _id: '7'
- _id: '623'
external_id:
arxiv:
- '2411.04120'
language:
- iso: eng
publication: arXiv:2411.04120
status: public
title: Second order cone relaxations for quantum Max Cut
type: preprint
user_id: '71541'
year: '2024'
...
---
_id: '48544'
abstract:
- lang: eng
text: 'When it comes to NP, its natural definition, its wide applicability across
scientific disciplines, and its timeless relevance, the writing is on the wall:
There can be only one. Quantum NP, on the other hand, is clearly the apple that
fell far from the tree of NP. Two decades since the first definitions of quantum
NP started rolling in, quantum complexity theorists face a stark reality: There''s
QMA, QCMA, QMA1, QMA(2), StoqMA, and NQP. In this article aimed at a general theoretical
computer science audience, I survey these various definitions of quantum NP, their
strengths and weaknesses, and why most of them, for better or worse, actually
appear to fit naturally into the complexity zoo.'
article_type: review
author:
- first_name: Sevag
full_name: Gharibian, Sevag
id: '71541'
last_name: Gharibian
orcid: 0000-0002-9992-3379
citation:
ama: 'Gharibian S. Guest Column: The 7 faces of quantum NP. ACM SIGACT News.
2024;54(4):54-91.'
apa: 'Gharibian, S. (2024). Guest Column: The 7 faces of quantum NP. ACM SIGACT
News, 54(4), 54–91.'
bibtex: '@article{Gharibian_2024, title={Guest Column: The 7 faces of quantum NP},
volume={54}, number={4}, journal={ACM SIGACT News}, author={Gharibian, Sevag},
year={2024}, pages={54–91} }'
chicago: 'Gharibian, Sevag. “Guest Column: The 7 Faces of Quantum NP.” ACM SIGACT
News 54, no. 4 (2024): 54–91.'
ieee: 'S. Gharibian, “Guest Column: The 7 faces of quantum NP,” ACM SIGACT News,
vol. 54, no. 4, pp. 54–91, 2024.'
mla: 'Gharibian, Sevag. “Guest Column: The 7 Faces of Quantum NP.” ACM SIGACT
News, vol. 54, no. 4, 2024, pp. 54–91.'
short: S. Gharibian, ACM SIGACT News 54 (2024) 54–91.
date_created: 2023-10-30T12:19:11Z
date_updated: 2026-05-15T08:42:54Z
department:
- _id: '7'
- _id: '623'
intvolume: ' 54'
issue: '4'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://arxiv.org/abs/2310.18010
oa: '1'
page: 54-91
publication: ACM SIGACT News
publication_status: published
related_material:
link:
- relation: confirmation
url: https://dl.acm.org/doi/abs/10.1145/3639528.3639535
status: public
title: 'Guest Column: The 7 faces of quantum NP'
type: journal_article
user_id: '71541'
volume: 54
year: '2024'
...
---
_id: '65638'
author:
- first_name: Andre
full_name: Gövert, Andre
last_name: Gövert
- first_name: Constanze
full_name: Niederhaus, Constanze
last_name: Niederhaus
- first_name: Eva
full_name: Blumberg, Eva
last_name: Blumberg
citation:
ama: 'Gövert A, Niederhaus C, Blumberg E. Professionalisierung für Sprachbildung
aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen eines Vertiefungsseminars
in der ersten Phase der sachunterrichtsdidaktischen Lehrer*innenbildung. . In:
Blumberg E, Constanze N, Anne M, eds. Mehrsprachigkeit in Der Schule: Sprachbildung
Im Und Durch Sachunterricht. Kohlhammer; 2024:295--309.'
apa: 'Gövert, A., Niederhaus, C., & Blumberg, E. (2024). Professionalisierung
für Sprachbildung aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen
eines Vertiefungsseminars in der ersten Phase der sachunterrichtsdidaktischen
Lehrer*innenbildung. . In E. Blumberg, N. Constanze, & M. Anne (Eds.), Mehrsprachigkeit
in der Schule: Sprachbildung im und durch Sachunterricht (pp. 295--309). Kohlhammer.'
bibtex: '@inbook{Gövert_Niederhaus_Blumberg_2024, place={Stuttgart}, title={Professionalisierung
für Sprachbildung aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen
eines Vertiefungsseminars in der ersten Phase der sachunterrichtsdidaktischen
Lehrer*innenbildung. }, booktitle={Mehrsprachigkeit in der Schule: Sprachbildung
im und durch Sachunterricht}, publisher={Kohlhammer}, author={Gövert, Andre and
Niederhaus, Constanze and Blumberg, Eva}, editor={Blumberg, Eva and Constanze,
Niederhaus and Anne, Mischendahl}, year={2024}, pages={295--309} }'
chicago: 'Gövert, Andre, Constanze Niederhaus, and Eva Blumberg. “Professionalisierung
Für Sprachbildung Aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen
Eines Vertiefungsseminars in Der Ersten Phase Der Sachunterrichtsdidaktischen
Lehrer*innenbildung. .” In Mehrsprachigkeit in Der Schule: Sprachbildung Im
Und Durch Sachunterricht, edited by Eva Blumberg, Niederhaus Constanze, and
Mischendahl Anne, 295--309. Stuttgart: Kohlhammer, 2024.'
ieee: 'A. Gövert, C. Niederhaus, and E. Blumberg, “Professionalisierung für Sprachbildung
aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen eines Vertiefungsseminars
in der ersten Phase der sachunterrichtsdidaktischen Lehrer*innenbildung. ,” in
Mehrsprachigkeit in der Schule: Sprachbildung im und durch Sachunterricht,
E. Blumberg, N. Constanze, and M. Anne, Eds. Stuttgart: Kohlhammer, 2024, pp.
295--309.'
mla: 'Gövert, Andre, et al. “Professionalisierung Für Sprachbildung Aus Sicht von
Sachunterrichtsstudierenden – Langzeitwirkungen Eines Vertiefungsseminars in Der
Ersten Phase Der Sachunterrichtsdidaktischen Lehrer*innenbildung. .” Mehrsprachigkeit
in Der Schule: Sprachbildung Im Und Durch Sachunterricht, edited by Eva Blumberg
et al., Kohlhammer, 2024, pp. 295--309.'
short: 'A. Gövert, C. Niederhaus, E. Blumberg, in: E. Blumberg, N. Constanze, M.
Anne (Eds.), Mehrsprachigkeit in Der Schule: Sprachbildung Im Und Durch Sachunterricht,
Kohlhammer, Stuttgart, 2024, pp. 295--309.'
date_created: 2026-05-19T11:46:42Z
date_updated: 2026-05-19T11:46:49Z
editor:
- first_name: Eva
full_name: Blumberg, Eva
last_name: Blumberg
- first_name: Niederhaus
full_name: Constanze, Niederhaus
last_name: Constanze
- first_name: Mischendahl
full_name: Anne, Mischendahl
last_name: Anne
language:
- iso: eng
page: 295--309
place: Stuttgart
publication: 'Mehrsprachigkeit in der Schule: Sprachbildung im und durch Sachunterricht'
publisher: Kohlhammer
status: public
title: 'Professionalisierung für Sprachbildung aus Sicht von Sachunterrichtsstudierenden
– Langzeitwirkungen eines Vertiefungsseminars in der ersten Phase der sachunterrichtsdidaktischen
Lehrer*innenbildung. '
type: book_chapter
user_id: '54999'
year: '2024'
...
---
_id: '65649'
citation:
ama: Drumm S, Niederhaus C, eds. (Mehr-)Sprachen-Bildung in Beruflichen Kontexten.
Vol 29.; 2024.
apa: (Mehr-)Sprachen-Bildung in beruflichen Kontexten. (2024). In S. Drumm &
C. Niederhaus (Eds.), Zeitschrift für Interkulturellen Fremdsprachenunterricht
(ZIF) (Vol. 29).
bibtex: '@book{Drumm_Niederhaus_2024, title={(Mehr-)Sprachen-Bildung in beruflichen
Kontexten}, volume={29}, journal={ Zeitschrift für Interkulturellen Fremdsprachenunterricht
(ZIF) }, year={2024} }'
chicago: Drumm, Sandra, and Constanze Niederhaus, eds. (Mehr-)Sprachen-Bildung
in Beruflichen Kontexten. Zeitschrift Für Interkulturellen Fremdsprachenunterricht
(ZIF) . Vol. 29, 2024.
ieee: S. Drumm and C. Niederhaus, Eds., (Mehr-)Sprachen-Bildung in beruflichen
Kontexten, vol. 29. 2024.
mla: Drumm, Sandra, and Constanze Niederhaus, editors. “(Mehr-)Sprachen-Bildung
in Beruflichen Kontexten.” Zeitschrift Für Interkulturellen Fremdsprachenunterricht
(ZIF) , vol. 29, 2024.
short: S. Drumm, C. Niederhaus, eds., (Mehr-)Sprachen-Bildung in Beruflichen Kontexten,
2024.
date_created: 2026-05-19T15:35:48Z
date_updated: 2026-05-19T15:36:17Z
editor:
- first_name: Sandra
full_name: Drumm, Sandra
last_name: Drumm
- first_name: Constanze
full_name: Niederhaus, Constanze
id: '54999'
last_name: Niederhaus
intvolume: ' 29'
language:
- iso: eng
publication: ' Zeitschrift für Interkulturellen Fremdsprachenunterricht (ZIF) '
status: public
title: (Mehr-)Sprachen-Bildung in beruflichen Kontexten
type: journal_editor
user_id: '54999'
volume: 29
year: '2024'
...
---
_id: '65648'
author:
- first_name: Sandra
full_name: Drumm, Sandra
last_name: Drumm
- first_name: Constanze
full_name: Niederhaus, Constanze
id: '54999'
last_name: Niederhaus
citation:
ama: 'Drumm S, Niederhaus C. Mehrsprachigkeit in Der Beruflichen Bildung: Einleitung
in Das Themenheft. LibreCat University; 2024. doi:10.48694/ZIF.3900'
apa: 'Drumm, S., & Niederhaus, C. (2024). Mehrsprachigkeit in der beruflichen
Bildung: Einleitung in das Themenheft. LibreCat University. https://doi.org/10.48694/ZIF.3900'
bibtex: '@book{Drumm_Niederhaus_2024, title={Mehrsprachigkeit in der beruflichen
Bildung: Einleitung in das Themenheft}, DOI={10.48694/ZIF.3900},
publisher={LibreCat University}, author={Drumm, Sandra and Niederhaus, Constanze},
year={2024} }'
chicago: 'Drumm, Sandra, and Constanze Niederhaus. Mehrsprachigkeit in Der Beruflichen
Bildung: Einleitung in Das Themenheft. LibreCat University, 2024. https://doi.org/10.48694/ZIF.3900.'
ieee: 'S. Drumm and C. Niederhaus, Mehrsprachigkeit in der beruflichen Bildung:
Einleitung in das Themenheft. LibreCat University, 2024.'
mla: 'Drumm, Sandra, and Constanze Niederhaus. Mehrsprachigkeit in Der Beruflichen
Bildung: Einleitung in Das Themenheft. LibreCat University, 2024, doi:10.48694/ZIF.3900.'
short: 'S. Drumm, C. Niederhaus, Mehrsprachigkeit in Der Beruflichen Bildung: Einleitung
in Das Themenheft, LibreCat University, 2024.'
date_created: 2026-05-19T15:29:38Z
date_updated: 2026-05-19T15:37:33Z
doi: 10.48694/ZIF.3900
publisher: LibreCat University
status: public
title: 'Mehrsprachigkeit in der beruflichen Bildung: Einleitung in das Themenheft'
type: research_data
user_id: '54999'
year: '2024'
...
---
_id: '56671'
author:
- first_name: Marvin
full_name: Illian, Marvin
id: '44169'
last_name: Illian
orcid: 0009-0007-2992-8346
- first_name: Christopher
full_name: Zinda, Christopher
last_name: Zinda
- first_name: Darius
full_name: Schlangenotto, Darius
last_name: Schlangenotto
citation:
ama: 'Illian M, Zinda C, Schlangenotto D. Data Store Architectures: Balancing Functionality
and Performance. In: 2024 IEEE International Conference on Industrial Technology
(ICIT). IEEE; 2024. doi:10.1109/icit58233.2024.10540811'
apa: 'Illian, M., Zinda, C., & Schlangenotto, D. (2024). Data Store Architectures:
Balancing Functionality and Performance. 2024 IEEE International Conference
on Industrial Technology (ICIT). https://doi.org/10.1109/icit58233.2024.10540811'
bibtex: '@inproceedings{Illian_Zinda_Schlangenotto_2024, title={Data Store Architectures:
Balancing Functionality and Performance}, DOI={10.1109/icit58233.2024.10540811},
booktitle={2024 IEEE International Conference on Industrial Technology (ICIT)},
publisher={IEEE}, author={Illian, Marvin and Zinda, Christopher and Schlangenotto,
Darius}, year={2024} }'
chicago: 'Illian, Marvin, Christopher Zinda, and Darius Schlangenotto. “Data Store
Architectures: Balancing Functionality and Performance.” In 2024 IEEE International
Conference on Industrial Technology (ICIT). IEEE, 2024. https://doi.org/10.1109/icit58233.2024.10540811.'
ieee: 'M. Illian, C. Zinda, and D. Schlangenotto, “Data Store Architectures: Balancing
Functionality and Performance,” 2024, doi: 10.1109/icit58233.2024.10540811.'
mla: 'Illian, Marvin, et al. “Data Store Architectures: Balancing Functionality
and Performance.” 2024 IEEE International Conference on Industrial Technology
(ICIT), IEEE, 2024, doi:10.1109/icit58233.2024.10540811.'
short: 'M. Illian, C. Zinda, D. Schlangenotto, in: 2024 IEEE International Conference
on Industrial Technology (ICIT), IEEE, 2024.'
date_created: 2024-10-17T15:58:15Z
date_updated: 2026-05-20T08:44:06Z
doi: 10.1109/icit58233.2024.10540811
language:
- iso: eng
publication: 2024 IEEE International Conference on Industrial Technology (ICIT)
publication_status: published
publisher: IEEE
quality_controlled: '1'
status: public
title: 'Data Store Architectures: Balancing Functionality and Performance'
type: conference
user_id: '44169'
year: '2024'
...
---
_id: '55175'
author:
- first_name: André
full_name: Uhde, André
id: '36049'
last_name: Uhde
- first_name: Stephan
full_name: Paul, Stephan
last_name: Paul
- first_name: Andreas
full_name: Horsch, Andreas
last_name: Horsch
- first_name: 'Daniel '
full_name: 'Kaltofen, Daniel '
last_name: Kaltofen
- first_name: Gregor
full_name: Weiß, Gregor
last_name: Weiß
citation:
ama: Uhde A, Paul S, Horsch A, Kaltofen D, Weiß G. Bankpolitik. 1st ed. Schäffer-Poeschel;
2024.
apa: Uhde, A., Paul, S., Horsch, A., Kaltofen, D., & Weiß, G. (2024). Bankpolitik
(1st ed.). Schäffer-Poeschel.
bibtex: '@book{Uhde_Paul_Horsch_Kaltofen_Weiß_2024, place={Stuttgart}, edition={1},
title={Bankpolitik}, publisher={Schäffer-Poeschel}, author={Uhde, André and Paul,
Stephan and Horsch, Andreas and Kaltofen, Daniel and Weiß, Gregor}, year={2024}
}'
chicago: 'Uhde, André, Stephan Paul, Andreas Horsch, Daniel Kaltofen, and Gregor
Weiß. Bankpolitik. 1st ed. Stuttgart: Schäffer-Poeschel, 2024.'
ieee: 'A. Uhde, S. Paul, A. Horsch, D. Kaltofen, and G. Weiß, Bankpolitik,
1st ed. Stuttgart: Schäffer-Poeschel, 2024.'
mla: Uhde, André, et al. Bankpolitik. 1st ed., Schäffer-Poeschel, 2024.
short: A. Uhde, S. Paul, A. Horsch, D. Kaltofen, G. Weiß, Bankpolitik, 1st ed.,
Schäffer-Poeschel, Stuttgart, 2024.
date_created: 2024-07-11T08:25:33Z
date_updated: 2026-05-27T10:58:34Z
department:
- _id: '19'
edition: '1'
language:
- iso: ger
page: '776'
place: Stuttgart
publication_identifier:
isbn:
- 978-3-7910-4633-4
publication_status: published
publisher: Schäffer-Poeschel
status: public
title: Bankpolitik
type: book
user_id: '36049'
year: '2024'
...
---
_id: '55517'
author:
- first_name: Vasileios
full_name: Rizos, Vasileios
last_name: Rizos
- first_name: Edoardo
full_name: Righetti, Edoardo
last_name: Righetti
- first_name: Amin
full_name: Kassab, Amin
id: '98377'
last_name: Kassab
citation:
ama: 'Rizos V, Righetti E, Kassab A. Understanding the barriers to recycling critical
raw materials for the energy transition: The case of rare earth permanent magnets.
Energy Reports. 2024;12:1673-1682. doi:10.1016/j.egyr.2024.07.022'
apa: 'Rizos, V., Righetti, E., & Kassab, A. (2024). Understanding the barriers
to recycling critical raw materials for the energy transition: The case of rare
earth permanent magnets. Energy Reports, 12, 1673–1682. https://doi.org/10.1016/j.egyr.2024.07.022'
bibtex: '@article{Rizos_Righetti_Kassab_2024, title={Understanding the barriers
to recycling critical raw materials for the energy transition: The case of rare
earth permanent magnets}, volume={12}, DOI={10.1016/j.egyr.2024.07.022},
journal={Energy Reports}, publisher={Elsevier BV}, author={Rizos, Vasileios and
Righetti, Edoardo and Kassab, Amin}, year={2024}, pages={1673–1682} }'
chicago: 'Rizos, Vasileios, Edoardo Righetti, and Amin Kassab. “Understanding the
Barriers to Recycling Critical Raw Materials for the Energy Transition: The Case
of Rare Earth Permanent Magnets.” Energy Reports 12 (2024): 1673–82. https://doi.org/10.1016/j.egyr.2024.07.022.'
ieee: 'V. Rizos, E. Righetti, and A. Kassab, “Understanding the barriers to recycling
critical raw materials for the energy transition: The case of rare earth permanent
magnets,” Energy Reports, vol. 12, pp. 1673–1682, 2024, doi: 10.1016/j.egyr.2024.07.022.'
mla: 'Rizos, Vasileios, et al. “Understanding the Barriers to Recycling Critical
Raw Materials for the Energy Transition: The Case of Rare Earth Permanent Magnets.”
Energy Reports, vol. 12, Elsevier BV, 2024, pp. 1673–82, doi:10.1016/j.egyr.2024.07.022.'
short: V. Rizos, E. Righetti, A. Kassab, Energy Reports 12 (2024) 1673–1682.
date_created: 2024-08-05T09:37:10Z
date_updated: 2026-05-28T11:11:17Z
doi: 10.1016/j.egyr.2024.07.022
intvolume: ' 12'
language:
- iso: eng
page: 1673-1682
publication: Energy Reports
publication_identifier:
issn:
- 2352-4847
publication_status: published
publisher: Elsevier BV
status: public
title: 'Understanding the barriers to recycling critical raw materials for the energy
transition: The case of rare earth permanent magnets'
type: journal_article
user_id: '98377'
volume: 12
year: '2024'
...
---
_id: '65723'
abstract:
- lang: eng
text: "This study aims to investigate student spatial reasoning, thinking, strategies,
interests, and\r\nchallenges across four different countries in the context of
collaborative group problem\r\nsolving. The researchers used a problem solving
scenario with groups of students that involved\r\npainting the outside of a cube,
which was composed of 216 cubes (6 × 6 × 6). the four\r\ncountries, findings were
mostly consistent among the student collaborative groups with some\r\nvariation
of problem solving strategies employed. One challenge encountered across the\r\nresearch
sites was student understanding of what the problem was asking. Overall, students\r\nwere
observed to be engaged and interested in this spatial reasoning problem solving
scenario\r\nwith some students expressing interest in having to visualize the
exterior and interior cubes for\r\nthe problem they were required to solve."
author:
- first_name: Hans-Jürgen
full_name: Stoppel, Hans-Jürgen
id: '101162'
last_name: Stoppel
- first_name: Monica
full_name: Arnal-Palacián, Monica
last_name: Arnal-Palacián
- first_name: Roberto
full_name: Catanuto, Roberto
last_name: Catanuto
- first_name: Bronislaw
full_name: Czarnocha, Bronislaw
last_name: Czarnocha
- first_name: Brian R.
full_name: Evans, Brian R.
last_name: Evans
- first_name: Malgorzata Aneta
full_name: Marciniak, Malgorzata Aneta
last_name: Marciniak
- first_name: Yana
full_name: Shvartsberg, Yana
last_name: Shvartsberg
citation:
ama: Stoppel H-J, Arnal-Palacián M, Catanuto R, et al. Strategies, interests, and
challenges in a spatial problem solving in different scenarios.
apa: Stoppel, H.-J., Arnal-Palacián, M., Catanuto, R., Czarnocha, B., Evans, B.
R., Marciniak, M. A., & Shvartsberg, Y. (n.d.). Strategies, interests,
and challenges in a spatial problem solving in different scenarios. 15th International
Congress on Mathematical Education, Sydney, Australia.
bibtex: '@inproceedings{Stoppel_Arnal-Palacián_Catanuto_Czarnocha_Evans_Marciniak_Shvartsberg,
title={Strategies, interests, and challenges in a spatial problem solving in different
scenarios}, author={Stoppel, Hans-Jürgen and Arnal-Palacián, Monica and Catanuto,
Roberto and Czarnocha, Bronislaw and Evans, Brian R. and Marciniak, Malgorzata
Aneta and Shvartsberg, Yana} }'
chicago: Stoppel, Hans-Jürgen, Monica Arnal-Palacián, Roberto Catanuto, Bronislaw
Czarnocha, Brian R. Evans, Malgorzata Aneta Marciniak, and Yana Shvartsberg. “Strategies,
Interests, and Challenges in a Spatial Problem Solving in Different Scenarios,”
n.d.
ieee: H.-J. Stoppel et al., “Strategies, interests, and challenges in a spatial
problem solving in different scenarios,” presented at the 15th International Congress
on Mathematical Education, Sydney, Australia.
mla: Stoppel, Hans-Jürgen, et al. Strategies, Interests, and Challenges in a
Spatial Problem Solving in Different Scenarios.
short: 'H.-J. Stoppel, M. Arnal-Palacián, R. Catanuto, B. Czarnocha, B.R. Evans,
M.A. Marciniak, Y. Shvartsberg, in: n.d.'
conference:
end_date: 2024-07-14
location: Sydney, Australia
name: 15th International Congress on Mathematical Education
start_date: 2024-07-07
date_created: 2026-05-29T07:55:29Z
date_updated: 2026-05-29T08:16:50Z
language:
- iso: eng
publication_status: accepted
status: public
title: Strategies, interests, and challenges in a spatial problem solving in different
scenarios
type: conference
user_id: '101162'
year: '2024'
...
---
_id: '65720'
author:
- first_name: Hans-Jürgen
full_name: Stoppel, Hans-Jürgen
id: '101162'
last_name: Stoppel
citation:
ama: 'Stoppel H-J. MINT-Unterricht – undenkbar für Lehrkräfte ohne mathematisches
Hintergrundwissen. In: Ebers P, Rösken F, Barzel B, Büchter A, Schacht F, Scherer
P, eds. Verlag für wissenschaftliche Texte und Medien; 2024.'
apa: Stoppel, H.-J. (2024). MINT-Unterricht – undenkbar für Lehrkräfte ohne mathematisches
Hintergrundwissen (P. Ebers, F. Rösken, B. Barzel, A. Büchter, F. Schacht,
& P. Scherer, Eds.). Verlag für wissenschaftliche Texte und Medien.
bibtex: '@inproceedings{Stoppel_2024, place={Münster}, title={MINT-Unterricht –
undenkbar für Lehrkräfte ohne mathematisches Hintergrundwissen}, publisher={Verlag
für wissenschaftliche Texte und Medien}, author={Stoppel, Hans-Jürgen}, editor={Ebers,
Patrick and Rösken, Fabian and Barzel, Bärbel and Büchter, Andreas and Schacht,
Florian and Scherer, Petra}, year={2024} }'
chicago: 'Stoppel, Hans-Jürgen. “MINT-Unterricht – undenkbar für Lehrkräfte ohne
mathematisches Hintergrundwissen.” edited by Patrick Ebers, Fabian Rösken, Bärbel
Barzel, Andreas Büchter, Florian Schacht, and Petra Scherer. Münster: Verlag für
wissenschaftliche Texte und Medien, 2024.'
ieee: H.-J. Stoppel, “MINT-Unterricht – undenkbar für Lehrkräfte ohne mathematisches
Hintergrundwissen,” Essen, 2024.
mla: Stoppel, Hans-Jürgen. MINT-Unterricht – undenkbar für Lehrkräfte ohne mathematisches
Hintergrundwissen. Edited by Patrick Ebers et al., Verlag für wissenschaftliche
Texte und Medien, 2024.
short: 'H.-J. Stoppel, in: P. Ebers, F. Rösken, B. Barzel, A. Büchter, F. Schacht,
P. Scherer (Eds.), Verlag für wissenschaftliche Texte und Medien, Münster, 2024.'
conference:
end_date: 2024-03-08
location: Essen
name: 57. Jahrestagung der Gesellschaft für Didaktik der Mathematik
start_date: 2024-03-04
date_created: 2026-05-29T07:16:44Z
date_updated: 2026-05-29T08:22:47Z
editor:
- first_name: Patrick
full_name: Ebers, Patrick
last_name: Ebers
- first_name: Fabian
full_name: Rösken, Fabian
last_name: Rösken
- first_name: Bärbel
full_name: Barzel, Bärbel
last_name: Barzel
- first_name: Andreas
full_name: Büchter, Andreas
last_name: Büchter
- first_name: Florian
full_name: Schacht, Florian
last_name: Schacht
- first_name: Petra
full_name: Scherer, Petra
last_name: Scherer
language:
- iso: ger
place: Münster
publication_identifier:
unknown:
- 978-3-95987-278-2
publication_status: published
publisher: Verlag für wissenschaftliche Texte und Medien
status: public
title: MINT-Unterricht – undenkbar für Lehrkräfte ohne mathematisches Hintergrundwissen
type: conference
user_id: '101162'
year: '2024'
...
---
_id: '62702'
abstract:
- lang: eng
text: 'Clifford algebras are a natural extension of division algebras, including
real numbers, complex numbers, quaternions, and octonions. Previous research in
knowledge graph embeddings has focused exclusively on Clifford algebras of a specific
type, which do not include nilpotent base vectors—elements that square to zero.
In this work, we introduce a novel approach by incorporating nilpotent base vectors
with a nilpotency index of two, leading to a more general form of Clifford algebras
named degenerate Clifford algebras. This generalization to degenerate Clifford
algebras does allow for covering dual numbers and as such include translations
and rotations models under the same generalization paradigm for the first time.
We develop two models to determine the parameters that define the algebra: one
using a greedy search and another predicting the parameters based on neural network
embeddings of the input knowledge graph. Our evaluation on seven benchmark datasets
demonstrates that this incorporation of nilpotent vectors enhances the quality
of embeddings. Additionally, our method outperforms state-of-the-art approaches
in terms of generalization, particularly regarding the mean reciprocal rank achieved
on validation data. Finally, we show that even a simple greedy search can effectively
discover optimal or near-optimal parameters for the algebra.'
author:
- first_name: Louis Mozart
full_name: Kamdem Teyou, Louis Mozart
id: '101165'
last_name: Kamdem Teyou
- first_name: Caglar
full_name: Demir, Caglar
id: '43817'
last_name: Demir
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
id: '65716'
last_name: Ngonga Ngomo
citation:
ama: 'Kamdem Teyou LM, Demir C, Ngonga Ngomo A-C. Embedding Knowledge Graphs in
Degenerate Clifford Algebras. In: Frontiers in Artificial Intelligence and
Applications. IOS Press; 2024. doi:10.3233/faia240627'
apa: Kamdem Teyou, L. M., Demir, C., & Ngonga Ngomo, A.-C. (2024). Embedding
Knowledge Graphs in Degenerate Clifford Algebras. In Frontiers in Artificial
Intelligence and Applications. 27TH EUROPEAN CONFERENCE ON ARTIFICIAL INTELLIGENCE,
Santiago de Compostela. IOS Press. https://doi.org/10.3233/faia240627
bibtex: '@inbook{Kamdem Teyou_Demir_Ngonga Ngomo_2024, title={Embedding Knowledge
Graphs in Degenerate Clifford Algebras}, DOI={10.3233/faia240627},
booktitle={Frontiers in Artificial Intelligence and Applications}, publisher={IOS
Press}, author={Kamdem Teyou, Louis Mozart and Demir, Caglar and Ngonga Ngomo,
Axel-Cyrille}, year={2024} }'
chicago: Kamdem Teyou, Louis Mozart, Caglar Demir, and Axel-Cyrille Ngonga Ngomo.
“Embedding Knowledge Graphs in Degenerate Clifford Algebras.” In Frontiers
in Artificial Intelligence and Applications. IOS Press, 2024. https://doi.org/10.3233/faia240627.
ieee: L. M. Kamdem Teyou, C. Demir, and A.-C. Ngonga Ngomo, “Embedding Knowledge
Graphs in Degenerate Clifford Algebras,” in Frontiers in Artificial Intelligence
and Applications, IOS Press, 2024.
mla: Kamdem Teyou, Louis Mozart, et al. “Embedding Knowledge Graphs in Degenerate
Clifford Algebras.” Frontiers in Artificial Intelligence and Applications,
IOS Press, 2024, doi:10.3233/faia240627.
short: 'L.M. Kamdem Teyou, C. Demir, A.-C. Ngonga Ngomo, in: Frontiers in Artificial
Intelligence and Applications, IOS Press, 2024.'
conference:
end_date: 2024-10-24
location: Santiago de Compostela
name: 27TH EUROPEAN CONFERENCE ON ARTIFICIAL INTELLIGENCE
start_date: 2024-10-19
date_created: 2025-11-28T14:32:43Z
date_updated: 2026-05-29T14:34:11Z
department:
- _id: '34'
- _id: '574'
doi: 10.3233/faia240627
language:
- iso: eng
popular_science: '1'
publication: Frontiers in Artificial Intelligence and Applications
publication_identifier:
isbn:
- '9781643685489'
issn:
- 0922-6389
- 1879-8314
publication_status: published
publisher: IOS Press
quality_controlled: '1'
status: public
title: Embedding Knowledge Graphs in Degenerate Clifford Algebras
type: book_chapter
user_id: '101165'
year: '2024'
...
---
_id: '62703'
abstract:
- lang: eng
text: We introduce a novel embedding method diverging from conventional approaches
by operating within function spaces of finite dimension rather than finite vector
space, thus departing significantly from standard knowledge graph embedding techniques.
Initially employing polynomial functions to compute embeddings, we progress to
more intricate representations using neural networks with varying layer complexities.
We argue that employing functions for embedding computation enhances expressiveness
and allows for more degrees of freedom, enabling operations such as composition,
derivatives and primitive of entities representation. Additionally, we meticulously
outline the step-by-step construction of our approach and provide code for reproducibility,
thereby facilitating further exploration and application in the field.
author:
- first_name: Louis Mozart
full_name: Kamdem Teyou, Louis Mozart
id: '101165'
last_name: Kamdem Teyou
- first_name: Caglar
full_name: Demir, Caglar
id: '43817'
last_name: Demir
- first_name: Axel-Cyrille
full_name: Ngonga Ngomo, Axel-Cyrille
last_name: Ngonga Ngomo
citation:
ama: 'Kamdem Teyou LM, Demir C, Ngonga Ngomo A-C. Embedding Knowledge Graphs in
Function Spaces. In: Proceedings of the 33rd ACM International Conference on
Information and Knowledge Management. ACM; 2024. doi:10.1145/3627673.3679819'
apa: Kamdem Teyou, L. M., Demir, C., & Ngonga Ngomo, A.-C. (2024). Embedding
Knowledge Graphs in Function Spaces. Proceedings of the 33rd ACM International
Conference on Information and Knowledge Management. 33rd ACM International
Conference on Information and Knowledge Management, Boise. https://doi.org/10.1145/3627673.3679819
bibtex: '@inproceedings{Kamdem Teyou_Demir_Ngonga Ngomo_2024, place={Boise}, title={Embedding
Knowledge Graphs in Function Spaces}, DOI={10.1145/3627673.3679819},
booktitle={Proceedings of the 33rd ACM International Conference on Information
and Knowledge Management}, publisher={ACM}, author={Kamdem Teyou, Louis Mozart
and Demir, Caglar and Ngonga Ngomo, Axel-Cyrille}, year={2024} }'
chicago: 'Kamdem Teyou, Louis Mozart, Caglar Demir, and Axel-Cyrille Ngonga Ngomo.
“Embedding Knowledge Graphs in Function Spaces.” In Proceedings of the 33rd
ACM International Conference on Information and Knowledge Management. Boise:
ACM, 2024. https://doi.org/10.1145/3627673.3679819.'
ieee: 'L. M. Kamdem Teyou, C. Demir, and A.-C. Ngonga Ngomo, “Embedding Knowledge
Graphs in Function Spaces,” presented at the 33rd ACM International Conference
on Information and Knowledge Management, Boise, 2024, doi: 10.1145/3627673.3679819.'
mla: Kamdem Teyou, Louis Mozart, et al. “Embedding Knowledge Graphs in Function
Spaces.” Proceedings of the 33rd ACM International Conference on Information
and Knowledge Management, ACM, 2024, doi:10.1145/3627673.3679819.
short: 'L.M. Kamdem Teyou, C. Demir, A.-C. Ngonga Ngomo, in: Proceedings of the
33rd ACM International Conference on Information and Knowledge Management, ACM,
Boise, 2024.'
conference:
end_date: 2024-10-25
location: Boise
name: 33rd ACM International Conference on Information and Knowledge Management
start_date: 2024-10-21
date_created: 2025-11-28T14:42:32Z
date_updated: 2026-05-29T14:32:04Z
department:
- _id: '34'
- _id: '574'
doi: 10.1145/3627673.3679819
language:
- iso: eng
place: Boise
publication: Proceedings of the 33rd ACM International Conference on Information and
Knowledge Management
publication_status: published
publisher: ACM
status: public
title: Embedding Knowledge Graphs in Function Spaces
type: conference
user_id: '101165'
year: '2024'
...
---
_id: '65760'
author:
- first_name: Sandra
full_name: Ballweg, Sandra
id: '94512'
last_name: Ballweg
citation:
ama: Ballweg S. Vielfalt, Erweiterung und ein Hauch von Mehrsprachigkeit – Eine
subjektive Perspektive auf Entwicklungen im Fach Deutsch als Fremd- und Zweitsprache
im Spiegel der InfoDaF in den Jahren 2010-2020. InfoDaF. 2024;50(6):650-663.
apa: Ballweg, S. (2024). Vielfalt, Erweiterung und ein Hauch von Mehrsprachigkeit
– Eine subjektive Perspektive auf Entwicklungen im Fach Deutsch als Fremd- und
Zweitsprache im Spiegel der InfoDaF in den Jahren 2010-2020. InfoDaF, 50(6),
650–663.
bibtex: '@article{Ballweg_2024, title={Vielfalt, Erweiterung und ein Hauch von Mehrsprachigkeit
– Eine subjektive Perspektive auf Entwicklungen im Fach Deutsch als Fremd- und
Zweitsprache im Spiegel der InfoDaF in den Jahren 2010-2020}, volume={50}, number={6},
journal={InfoDaF}, author={Ballweg, Sandra}, year={2024}, pages={650–663} }'
chicago: 'Ballweg, Sandra. “Vielfalt, Erweiterung Und Ein Hauch von Mehrsprachigkeit
– Eine Subjektive Perspektive Auf Entwicklungen Im Fach Deutsch Als Fremd- Und
Zweitsprache Im Spiegel Der InfoDaF in Den Jahren 2010-2020.” InfoDaF 50,
no. 6 (2024): 650–63.'
ieee: S. Ballweg, “Vielfalt, Erweiterung und ein Hauch von Mehrsprachigkeit – Eine
subjektive Perspektive auf Entwicklungen im Fach Deutsch als Fremd- und Zweitsprache
im Spiegel der InfoDaF in den Jahren 2010-2020,” InfoDaF, vol. 50, no.
6, pp. 650–663, 2024.
mla: Ballweg, Sandra. “Vielfalt, Erweiterung Und Ein Hauch von Mehrsprachigkeit
– Eine Subjektive Perspektive Auf Entwicklungen Im Fach Deutsch Als Fremd- Und
Zweitsprache Im Spiegel Der InfoDaF in Den Jahren 2010-2020.” InfoDaF,
vol. 50, no. 6, 2024, pp. 650–63.
short: S. Ballweg, InfoDaF 50 (2024) 650–663.
date_created: 2026-06-03T07:00:52Z
date_updated: 2026-06-03T07:09:08Z
department:
- _id: '468'
- _id: '5'
intvolume: ' 50'
issue: '6'
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.degruyterbrill.com/de/document/doi/10.1515/infodaf-2023-0075/html
oa: '1'
page: 650-663
publication: InfoDaF
status: public
title: Vielfalt, Erweiterung und ein Hauch von Mehrsprachigkeit – Eine subjektive
Perspektive auf Entwicklungen im Fach Deutsch als Fremd- und Zweitsprache im Spiegel
der InfoDaF in den Jahren 2010-2020
type: journal_article
user_id: '94512'
volume: 50
year: '2024'
...
---
_id: '54247'
author:
- first_name: Axel
full_name: Berndt, Axel
id: '55565'
last_name: Berndt
- first_name: Davide Andrea
full_name: Mauro, Davide Andrea
id: '104047'
last_name: Mauro
orcid: 0000-0001-8437-4517
citation:
ama: 'Berndt A, Mauro DA. Arpeggiatorum: An audio controllable MIDI arpeggiator.
In: Proceedings of the Sound and Music Computing Conference (SMC) 2024.
Sound and Music Computing Network / Universidade do Porto; 2024.'
apa: 'Berndt, A., & Mauro, D. A. (2024). Arpeggiatorum: An audio controllable
MIDI arpeggiator. Proceedings of the Sound and Music Computing Conference (SMC)
2024.'
bibtex: '@inproceedings{Berndt_Mauro_2024, place={Porto, Porugal}, title={Arpeggiatorum:
An audio controllable MIDI arpeggiator}, booktitle={Proceedings of the Sound and
Music Computing Conference (SMC) 2024}, publisher={Sound and Music Computing Network
/ Universidade do Porto}, author={Berndt, Axel and Mauro, Davide Andrea}, year={2024}
}'
chicago: 'Berndt, Axel, and Davide Andrea Mauro. “Arpeggiatorum: An Audio Controllable
MIDI Arpeggiator.” In Proceedings of the Sound and Music Computing Conference
(SMC) 2024. Porto, Porugal: Sound and Music Computing Network / Universidade
do Porto, 2024.'
ieee: 'A. Berndt and D. A. Mauro, “Arpeggiatorum: An audio controllable MIDI arpeggiator,”
2024.'
mla: 'Berndt, Axel, and Davide Andrea Mauro. “Arpeggiatorum: An Audio Controllable
MIDI Arpeggiator.” Proceedings of the Sound and Music Computing Conference
(SMC) 2024, Sound and Music Computing Network / Universidade do Porto, 2024.'
short: 'A. Berndt, D.A. Mauro, in: Proceedings of the Sound and Music Computing
Conference (SMC) 2024, Sound and Music Computing Network / Universidade do Porto,
Porto, Porugal, 2024.'
date_created: 2024-05-13T14:56:18Z
date_updated: 2026-06-03T13:00:21Z
department:
- _id: '233'
language:
- iso: eng
place: Porto, Porugal
project:
- _id: '1048'
name: KreativInstitut.OWL
publication: Proceedings of the Sound and Music Computing Conference (SMC) 2024
publisher: Sound and Music Computing Network / Universidade do Porto
status: public
title: 'Arpeggiatorum: An audio controllable MIDI arpeggiator'
type: conference
user_id: '55565'
year: '2024'
...