---
_id: '61149'
abstract:
- lang: eng
text: The use of continuous fiber-reinforced thermoplastics (FRTP) in automotive
industry increases due to their excellent material properties and possibility
of rapid processing. The scale spanning heterogeneity of their material structure
and its influence on the material behavior, however, presents significant challenges
for most joining technologies, such as self-piercing riveting (SPR). During mechanical
joining, the material structure is significantly altered within and around the
joining zone, heavily influencing the material behavior. A comprehensive understanding
of the underlying phenomena of material alteration during the SPR process is essential
as basis for validating numerical simulations. This study examines the material
structure at ten stages of a step-setting test of SPR with two FRTP sheets with
glass-fiber reinforcement. Utilizing X-ray computed tomography (CT), the damage
phenomena within different areas of the setting test are analyzed three-dimensionally
and key parameters are quantified. Dominating phenomena during the penetration
of the rivet into the laminate are fiber failure (FF), interfiber failure (IFF)
and fiber bending, while delamination, fiber kinking and roving splitting are
also observed. At the final stages, the bottom layers of the second sheet collapse
and form a bulge into the cavity of the die.
author:
- first_name: Alrik
full_name: Dargel, Alrik
id: '114764'
last_name: Dargel
- first_name: Benjamin
full_name: Gröger, Benjamin
last_name: Gröger
- first_name: Malte Christian
full_name: Schlichter, Malte Christian
id: '61977'
last_name: Schlichter
- first_name: Johannes
full_name: Gerritzen, Johannes
id: '105344'
last_name: Gerritzen
orcid: 0000-0002-0169-8602
- first_name: Daniel
full_name: Köhler, Daniel
id: '83408'
last_name: Köhler
- first_name: Gerson
full_name: Meschut, Gerson
id: '32056'
last_name: Meschut
orcid: 0000-0002-2763-1246
- first_name: Maik
full_name: Gude, Maik
last_name: Gude
- first_name: Robert
full_name: Kupfer, Robert
last_name: Kupfer
citation:
ama: 'Dargel A, Gröger B, Schlichter MC, et al. LOCAL DEFORMATION AND FAILURE OF
COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.
In: Gomes JFS, Meguid SA, eds. Proceedings of the 8th International Conference
on Integrity-Reliability-Failure (IRF2025). FEUP; 2025. doi:10.24840/978-972-752-323-8'
apa: 'Dargel, A., Gröger, B., Schlichter, M. C., Gerritzen, J., Köhler, D., Meschut,
G., Gude, M., & Kupfer, R. (2025). LOCAL DEFORMATION AND FAILURE OF COMPOSITES
DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION. In J.
F. S. Gomes & S. A. Meguid (Eds.), Proceedings of the 8th International
Conference on Integrity-Reliability-Failure (IRF2025). FEUP. https://doi.org/10.24840/978-972-752-323-8'
bibtex: '@inproceedings{Dargel_Gröger_Schlichter_Gerritzen_Köhler_Meschut_Gude_Kupfer_2025,
place={Porto}, title={LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING
RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION}, DOI={10.24840/978-972-752-323-8},
booktitle={Proceedings of the 8th International Conference on Integrity-Reliability-Failure
(IRF2025)}, publisher={FEUP}, author={Dargel, Alrik and Gröger, Benjamin and Schlichter,
Malte Christian and Gerritzen, Johannes and Köhler, Daniel and Meschut, Gerson
and Gude, Maik and Kupfer, Robert}, editor={Gomes, J.F. Silva and Meguid, Shaker
A.}, year={2025} }'
chicago: 'Dargel, Alrik, Benjamin Gröger, Malte Christian Schlichter, Johannes Gerritzen,
Daniel Köhler, Gerson Meschut, Maik Gude, and Robert Kupfer. “LOCAL DEFORMATION
AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE
INVESTIGATION.” In Proceedings of the 8th International Conference on Integrity-Reliability-Failure
(IRF2025), edited by J.F. Silva Gomes and Shaker A. Meguid. Porto: FEUP, 2025.
https://doi.org/10.24840/978-972-752-323-8.'
ieee: 'A. Dargel et al., “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING
SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION,” in Proceedings
of the 8th International Conference on Integrity-Reliability-Failure (IRF2025),
Porto, 2025, doi: 10.24840/978-972-752-323-8.'
mla: 'Dargel, Alrik, et al. “LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING
SELF-PIERCING RIVETING: A CT BASED MICROSTRUCTURE INVESTIGATION.” Proceedings
of the 8th International Conference on Integrity-Reliability-Failure (IRF2025),
edited by J.F. Silva Gomes and Shaker A. Meguid, FEUP, 2025, doi:10.24840/978-972-752-323-8.'
short: 'A. Dargel, B. Gröger, M.C. Schlichter, J. Gerritzen, D. Köhler, G. Meschut,
M. Gude, R. Kupfer, in: J.F.S. Gomes, S.A. Meguid (Eds.), Proceedings of the 8th
International Conference on Integrity-Reliability-Failure (IRF2025), FEUP, Porto,
2025.'
conference:
end_date: 2025-07-18
location: Porto
name: 8th International Conference on Integrity-Reliability-Failure (IRF2025)
start_date: 2025-07-15
date_created: 2025-09-08T11:52:45Z
date_updated: 2026-02-27T06:45:17Z
doi: 10.24840/978-972-752-323-8
editor:
- first_name: J.F. Silva
full_name: Gomes, J.F. Silva
last_name: Gomes
- first_name: Shaker A.
full_name: Meguid, Shaker A.
last_name: Meguid
keyword:
- self-piercing riveting
- computed tomography
- thermoplastic composites
- process-structure-interaction
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.researchgate.net/publication/395593556_LOCAL_DEFORMATION_AND_FAILURE_OF_COMPOSITES_DURING_SELF-PIERCING_RIVETING_A_CT_BASED_MICROSTRUCTURE_INVESTIGATION
oa: '1'
place: Porto
project:
- _id: '133'
name: TRR 285 - Project Area C
- _id: '148'
name: TRR 285 - Subproject C04
- _id: '130'
name: 'TRR 285: Methodenentwicklung zur mechanischen Fügbarkeit in wandlungsfähigen
Prozessketten'
- _id: '131'
name: TRR 285 - Project Area A
- _id: '137'
name: TRR 285 - Subproject A03
- _id: '135'
name: TRR 285 - Subproject A01
publication: Proceedings of the 8th International Conference on Integrity-Reliability-Failure
(IRF2025)
publication_identifier:
isbn:
- '9789727523238'
publication_status: published
publisher: FEUP
status: public
title: 'LOCAL DEFORMATION AND FAILURE OF COMPOSITES DURING SELF-PIERCING RIVETING:
A CT BASED MICROSTRUCTURE INVESTIGATION'
type: conference
user_id: '105344'
year: '2025'
...
---
_id: '54513'
abstract:
- lang: eng
text: Learning argumentative writing is challenging. Besides writing fundamentals
such as syntax and grammar, learners must select and arrange argument components
meaningfully to create high-quality essays. To support argumentative writing computationally,
one step is to mine the argumentative structure. When combined with automatic
essay scoring, interactions of the argumentative structure and quality scores
can be exploited for comprehensive writing support. Although studies have shown
the usefulness of using information about the argumentative structure for essay
scoring, no argument mining corpus with ground-truth essay quality annotations
has been published yet. Moreover, none of the existing corpora contain essays
written by school students specifically. To fill this research gap, we present
a German corpus of 1,320 essays from school students of two age groups. Each essay
has been manually annotated for argumentative structure and quality on multiple
levels of granularity. We propose baseline approaches to argument mining and essay
scoring, and we analyze interactions between both tasks, thereby laying the ground
for quality-oriented argumentative writing support.
author:
- first_name: Maja
full_name: Stahl, Maja
last_name: Stahl
- first_name: Nadine
full_name: Michel, Nadine
id: '47857'
last_name: Michel
- first_name: Sebastian
full_name: Kilsbach, Sebastian
last_name: Kilsbach
- first_name: 'Julian '
full_name: 'Schmidtke, Julian '
last_name: Schmidtke
- first_name: Sara
full_name: Rezat, Sara
last_name: Rezat
- first_name: Henning
full_name: Wachsmuth, Henning
last_name: Wachsmuth
citation:
ama: 'Stahl M, Michel N, Kilsbach S, Schmidtke J, Rezat S, Wachsmuth H. A School
Student Essay Corpus for Analyzing Interactions of Argumentative Structure and
Quality. In: ; 2024. doi:10.48550/arXiv.2404.02529'
apa: Stahl, M., Michel, N., Kilsbach, S., Schmidtke, J., Rezat, S., & Wachsmuth,
H. (2024). A School Student Essay Corpus for Analyzing Interactions of Argumentative
Structure and Quality. https://doi.org/10.48550/arXiv.2404.02529
bibtex: '@inproceedings{Stahl_Michel_Kilsbach_Schmidtke_Rezat_Wachsmuth_2024, title={A
School Student Essay Corpus for Analyzing Interactions of Argumentative Structure
and Quality}, DOI={10.48550/arXiv.2404.02529},
author={Stahl, Maja and Michel, Nadine and Kilsbach, Sebastian and Schmidtke,
Julian and Rezat, Sara and Wachsmuth, Henning}, year={2024} }'
chicago: Stahl, Maja, Nadine Michel, Sebastian Kilsbach, Julian Schmidtke, Sara
Rezat, and Henning Wachsmuth. “A School Student Essay Corpus for Analyzing Interactions
of Argumentative Structure and Quality,” 2024. https://doi.org/10.48550/arXiv.2404.02529.
ieee: 'M. Stahl, N. Michel, S. Kilsbach, J. Schmidtke, S. Rezat, and H. Wachsmuth,
“A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure
and Quality,” 2024, doi: 10.48550/arXiv.2404.02529.'
mla: Stahl, Maja, et al. A School Student Essay Corpus for Analyzing Interactions
of Argumentative Structure and Quality. 2024, doi:10.48550/arXiv.2404.02529.
short: 'M. Stahl, N. Michel, S. Kilsbach, J. Schmidtke, S. Rezat, H. Wachsmuth,
in: 2024.'
date_created: 2024-05-29T12:11:43Z
date_updated: 2024-05-29T12:18:44Z
doi: 10.48550/arXiv.2404.02529
keyword:
- Annotation
- Corpus
- Argumentative Structure
language:
- iso: eng
status: public
title: A School Student Essay Corpus for Analyzing Interactions of Argumentative Structure
and Quality
type: conference
user_id: '47857'
year: '2024'
...
---
_id: '46637'
article_number: '100174'
author:
- first_name: Munko
full_name: Gonchikzhapov, Munko
id: '94996'
last_name: Gonchikzhapov
orcid: https://orcid.org/0000-0002-7773-047X
- first_name: Tina
full_name: Kasper, Tina
id: '94562'
last_name: Kasper
orcid: '0000-0003-3993-5316 '
citation:
ama: Gonchikzhapov M, Kasper T. Thermal and chemical structure of ethanol and 2-ethylhexanoic
acid/ethanol SpraySyn flames. Applications in Energy and Combustion Science.
2023;15. doi:10.1016/j.jaecs.2023.100174
apa: Gonchikzhapov, M., & Kasper, T. (2023). Thermal and chemical structure
of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames. Applications in
Energy and Combustion Science, 15, Article 100174. https://doi.org/10.1016/j.jaecs.2023.100174
bibtex: '@article{Gonchikzhapov_Kasper_2023, title={Thermal and chemical structure
of ethanol and 2-ethylhexanoic acid/ethanol SpraySyn flames}, volume={15}, DOI={10.1016/j.jaecs.2023.100174},
number={100174}, journal={Applications in Energy and Combustion Science}, publisher={Elsevier
BV}, author={Gonchikzhapov, Munko and Kasper, Tina}, year={2023} }'
chicago: Gonchikzhapov, Munko, and Tina Kasper. “Thermal and Chemical Structure
of Ethanol and 2-Ethylhexanoic Acid/Ethanol SpraySyn Flames.” Applications
in Energy and Combustion Science 15 (2023). https://doi.org/10.1016/j.jaecs.2023.100174.
ieee: 'M. Gonchikzhapov and T. Kasper, “Thermal and chemical structure of ethanol
and 2-ethylhexanoic acid/ethanol SpraySyn flames,” Applications in Energy and
Combustion Science, vol. 15, Art. no. 100174, 2023, doi: 10.1016/j.jaecs.2023.100174.'
mla: Gonchikzhapov, Munko, and Tina Kasper. “Thermal and Chemical Structure of Ethanol
and 2-Ethylhexanoic Acid/Ethanol SpraySyn Flames.” Applications in Energy and
Combustion Science, vol. 15, 100174, Elsevier BV, 2023, doi:10.1016/j.jaecs.2023.100174.
short: M. Gonchikzhapov, T. Kasper, Applications in Energy and Combustion Science
15 (2023).
date_created: 2023-08-22T13:26:37Z
date_updated: 2023-08-24T08:55:26Z
department:
- _id: '43'
doi: 10.1016/j.jaecs.2023.100174
intvolume: ' 15'
keyword:
- Nanoparticle synthesis
- Flame spray pyrolysis
- SpraySyn burner
- Flame structure
- Species distribution
- Temperature distribution
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S2666352X23000638
oa: '1'
publication: Applications in Energy and Combustion Science
publication_identifier:
issn:
- 2666-352X
publication_status: published
publisher: Elsevier BV
status: public
title: Thermal and chemical structure of ethanol and 2-ethylhexanoic acid/ethanol
SpraySyn flames
type: journal_article
user_id: '94996'
volume: 15
year: '2023'
...
---
_id: '20159'
abstract:
- lang: eng
text: "Let G = (V,E) be an undirected graph on n vertices with non-negative capacities
on its edges. The mincut sensitivity problem for the insertion of an edge is defined
as follows. Build a compact data structure for G and a given set S ⊆ V of vertices
that, on receiving any edge (x,y) ∈ S×S of positive capacity as query input, can
efficiently report the set of all pairs from S× S whose mincut value increases
upon insertion of the edge (x,y) to G. The only result that exists for this problem
is for a single pair of vertices (Picard and Queyranne, Mathematical Programming
Study, 13 (1980), 8-16). We present the following results for the single source
and the all-pairs versions of this problem. \r\n1) Single source: Given any designated
source vertex s, there exists a data structure of size \U0001D4AA(|S|) that can
output all those vertices from S whose mincut value to s increases upon insertion
of any given edge. The time taken by the data structure to answer any query is
\U0001D4AA(|S|). \r\n2) All-pairs: There exists an \U0001D4AA(|S|²) size data
structure that can output all those pairs of vertices from S× S whose mincut value
gets increased upon insertion of any given edge. The time taken by the data structure
to answer any query is \U0001D4AA(k), where k is the number of pairs of vertices
whose mincut increases. \r\nFor both these versions, we also address the problem
of reporting the values of the mincuts upon insertion of any given edge. To derive
our results, we use interesting insights into the nearest and the farthest mincuts
for a pair of vertices. In addition, a crucial result, that we establish and use
in our data structures, is that there exists a directed acyclic graph of \U0001D4AA(n)
size that compactly stores the farthest mincuts from all vertices of V to a designated
vertex s in the graph. We believe that this result is of independent interest,
especially, because it also complements a previously existing result by Hariharan
et al. (STOC 2007) that the nearest mincuts from all vertices of V to s is a laminar
family, and hence, can be stored compactly in a tree of \U0001D4AA(n) size."
author:
- first_name: Surender
full_name: Baswana, Surender
last_name: Baswana
- first_name: Shiv
full_name: Gupta, Shiv
last_name: Gupta
- first_name: Till
full_name: Knollmann, Till
id: '39241'
last_name: Knollmann
orcid: 0000-0003-2014-4696
citation:
ama: 'Baswana S, Gupta S, Knollmann T. Mincut Sensitivity Data Structures for the
Insertion of an Edge. In: Grandoni F, Herman G, Sanders P, eds. 28th Annual
European Symposium on Algorithms (ESA 2020). Vol 173. Leibniz International
Proceedings in Informatics (LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum
für Informatik; 2020:12:1-12:14. doi:10.4230/LIPIcs.ESA.2020.12'
apa: 'Baswana, S., Gupta, S., & Knollmann, T. (2020). Mincut Sensitivity Data
Structures for the Insertion of an Edge. In F. Grandoni, G. Herman, & P. Sanders
(Eds.), 28th Annual European Symposium on Algorithms (ESA 2020) (Vol. 173,
pp. 12:1-12:14). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik.
https://doi.org/10.4230/LIPIcs.ESA.2020.12'
bibtex: '@inproceedings{Baswana_Gupta_Knollmann_2020, place={Dagstuhl, Germany},
series={Leibniz International Proceedings in Informatics (LIPIcs)}, title={Mincut
Sensitivity Data Structures for the Insertion of an Edge}, volume={173}, DOI={10.4230/LIPIcs.ESA.2020.12},
booktitle={28th Annual European Symposium on Algorithms (ESA 2020)}, publisher={Schloss
Dagstuhl -- Leibniz-Zentrum für Informatik}, author={Baswana, Surender and Gupta,
Shiv and Knollmann, Till}, editor={Grandoni, Fabrizio and Herman, Grzegorz and
Sanders, PeterEditors}, year={2020}, pages={12:1-12:14}, collection={Leibniz International
Proceedings in Informatics (LIPIcs)} }'
chicago: 'Baswana, Surender, Shiv Gupta, and Till Knollmann. “Mincut Sensitivity
Data Structures for the Insertion of an Edge.” In 28th Annual European Symposium
on Algorithms (ESA 2020), edited by Fabrizio Grandoni, Grzegorz Herman, and
Peter Sanders, 173:12:1-12:14. Leibniz International Proceedings in Informatics
(LIPIcs). Dagstuhl, Germany: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik,
2020. https://doi.org/10.4230/LIPIcs.ESA.2020.12.'
ieee: S. Baswana, S. Gupta, and T. Knollmann, “Mincut Sensitivity Data Structures
for the Insertion of an Edge,” in 28th Annual European Symposium on Algorithms
(ESA 2020), 2020, vol. 173, pp. 12:1-12:14.
mla: Baswana, Surender, et al. “Mincut Sensitivity Data Structures for the Insertion
of an Edge.” 28th Annual European Symposium on Algorithms (ESA 2020), edited
by Fabrizio Grandoni et al., vol. 173, Schloss Dagstuhl -- Leibniz-Zentrum für
Informatik, 2020, pp. 12:1-12:14, doi:10.4230/LIPIcs.ESA.2020.12.
short: 'S. Baswana, S. Gupta, T. Knollmann, in: F. Grandoni, G. Herman, P. Sanders
(Eds.), 28th Annual European Symposium on Algorithms (ESA 2020), Schloss Dagstuhl
-- Leibniz-Zentrum für Informatik, Dagstuhl, Germany, 2020, pp. 12:1-12:14.'
date_created: 2020-10-21T12:00:20Z
date_updated: 2022-01-06T06:54:20Z
department:
- _id: '63'
doi: 10.4230/LIPIcs.ESA.2020.12
editor:
- first_name: Fabrizio
full_name: Grandoni, Fabrizio
last_name: Grandoni
- first_name: Grzegorz
full_name: Herman, Grzegorz
last_name: Herman
- first_name: Peter
full_name: Sanders, Peter
last_name: Sanders
intvolume: ' 173'
keyword:
- Mincut
- Sensitivity
- Data Structure
language:
- iso: eng
page: 12:1-12:14
place: Dagstuhl, Germany
publication: 28th Annual European Symposium on Algorithms (ESA 2020)
publication_identifier:
isbn:
- 978-3-95977-162-7
issn:
- 1868-8969
publisher: Schloss Dagstuhl -- Leibniz-Zentrum für Informatik
series_title: Leibniz International Proceedings in Informatics (LIPIcs)
status: public
title: Mincut Sensitivity Data Structures for the Insertion of an Edge
type: conference
user_id: '39241'
volume: 173
year: '2020'
...
---
_id: '64018'
abstract:
- lang: eng
text: CO oxidation is an extensively studied reaction in heterogeneous catalysis
due to its seeming simplicity and its great importance for emission control. However,
the role of particle size and more specifically structure sensitivity in this
reaction is still controversial. In the present study, colloidal “surfactant-free”
Pt nanoparticles (NPs) in a size regime of 1–4 nm with narrow size distribution
and control over particle size were synthesized and subsequently supported on
Al2O3 to prepare model catalysts. CO oxidation was performed using Pt NPs catalysts
with particles sizes of 1, 2, 3, and 4 nm at different reaction temperatures.
It is shown that the reaction exhibits a particle size effect that depends strongly
on the reaction conditions. At 170 °C, the reaction seems to proceed within the
same kinetic regime for all particle sizes, but the surface normalized activity
depends strongly on the particle size, with maximum activity for nanoparticles
2 nm in diameter. A temperature increase to 200 °C leads to a change of the kinetic
regime that depends on the particle size. For Pt NPs 1 nm in diameter a reaction
order of 1 for O2 was observed, indicating that O2 adsorbs molecularly and dissociates
in a following step, which represents the generally accepted mechanism on Pt surfaces.
The reaction order of −1 for CO demonstrates that the surface is saturated with
CO under reaction conditions. With increasing particle size, the reaction orders
of O2 and CO change. For particles 2 nm in size, an increase in temperature also
results in reaction orders of 1 for O2 and −1 for CO; NPs of 3 and 4 nm, even
at higher temperatures, show no clear kinetic behavior that can be explained by
a single reaction mechanism. Instead, the Boudouard reaction between two adjacent
adsorbed CO molecules was identified as an important additional reaction pathway
that occurs preferentially on large particles and causes more complex kinetics.
author:
- first_name: Sarah
full_name: Neumann, Sarah
last_name: Neumann
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Stephen
full_name: Paul, Stephen
last_name: Paul
- first_name: Greg
full_name: Thiele, Greg
last_name: Thiele
- first_name: Heiko
full_name: Sievers, Heiko
last_name: Sievers
- first_name: Marcus
full_name: Bäumer, Marcus
last_name: Bäumer
- first_name: Sebastian
full_name: Kunz, Sebastian
last_name: Kunz
citation:
ama: Neumann S, Gutmann T, Buntkowsky G, et al. Insights into the reaction mechanism
and particle size effects of CO oxidation over supported Pt nanoparticle catalysts.
Journal of Catalysis. 2019;377:662–672. doi:10.1016/j.jcat.2019.07.049
apa: Neumann, S., Gutmann, T., Buntkowsky, G., Paul, S., Thiele, G., Sievers, H.,
Bäumer, M., & Kunz, S. (2019). Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts. Journal
of Catalysis, 377, 662–672. https://doi.org/10.1016/j.jcat.2019.07.049
bibtex: '@article{Neumann_Gutmann_Buntkowsky_Paul_Thiele_Sievers_Bäumer_Kunz_2019,
title={Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts}, volume={377}, DOI={10.1016/j.jcat.2019.07.049},
journal={Journal of Catalysis}, author={Neumann, Sarah and Gutmann, Torsten and
Buntkowsky, Gerd and Paul, Stephen and Thiele, Greg and Sievers, Heiko and Bäumer,
Marcus and Kunz, Sebastian}, year={2019}, pages={662–672} }'
chicago: 'Neumann, Sarah, Torsten Gutmann, Gerd Buntkowsky, Stephen Paul, Greg Thiele,
Heiko Sievers, Marcus Bäumer, and Sebastian Kunz. “Insights into the Reaction
Mechanism and Particle Size Effects of CO Oxidation over Supported Pt Nanoparticle
Catalysts.” Journal of Catalysis 377 (2019): 662–672. https://doi.org/10.1016/j.jcat.2019.07.049.'
ieee: 'S. Neumann et al., “Insights into the reaction mechanism and particle
size effects of CO oxidation over supported Pt nanoparticle catalysts,” Journal
of Catalysis, vol. 377, pp. 662–672, 2019, doi: 10.1016/j.jcat.2019.07.049.'
mla: Neumann, Sarah, et al. “Insights into the Reaction Mechanism and Particle Size
Effects of CO Oxidation over Supported Pt Nanoparticle Catalysts.” Journal
of Catalysis, vol. 377, 2019, pp. 662–672, doi:10.1016/j.jcat.2019.07.049.
short: S. Neumann, T. Gutmann, G. Buntkowsky, S. Paul, G. Thiele, H. Sievers, M.
Bäumer, S. Kunz, Journal of Catalysis 377 (2019) 662–672.
date_created: 2026-02-07T16:02:06Z
date_updated: 2026-02-17T16:14:45Z
doi: 10.1016/j.jcat.2019.07.049
extern: '1'
intvolume: ' 377'
keyword:
- Solid state NMR
- “Surfactant-free” platinum nanoparticles
- CO oxidation
- Particle size effect
- Structure sensitivity
language:
- iso: eng
page: 662–672
publication: Journal of Catalysis
status: public
title: Insights into the reaction mechanism and particle size effects of CO oxidation
over supported Pt nanoparticle catalysts
type: journal_article
user_id: '100715'
volume: 377
year: '2019'
...
---
_id: '2331'
abstract:
- lang: eng
text: A user generally writes software requirements in ambiguous and incomplete
form by using natural language; therefore, a software developer may have difficulty
in clearly understanding what the meanings are. To solve this problem with automation,
we propose a classifier for semantic annotation with manually pre-defined semantic
categories. To improve our classifier, we carefully designed syntactic features
extracted by constituency and dependency parsers. Even with a small dataset and
a large number of classes, our proposed classifier records an accuracy of 0.75,
which outperforms the previous model, REaCT.
article_type: original
author:
- first_name: 'Yeongsu '
full_name: 'Kim, Yeongsu '
last_name: Kim
- first_name: Seungwoo
full_name: Lee, Seungwoo
last_name: Lee
- first_name: Markus
full_name: Dollmann, Markus
id: '27578'
last_name: Dollmann
- first_name: Michaela
full_name: Geierhos, Michaela
id: '42496'
last_name: Geierhos
orcid: 0000-0002-8180-5606
citation:
ama: Kim Y, Lee S, Dollmann M, Geierhos M. Improving Classifiers for Semantic Annotation
of Software Requirements with Elaborate Syntactic Structure. International
Journal of Advanced Science and Technology. 2018;112:123-136. doi:10.14257/ijast.2018.112.12
apa: Kim, Y., Lee, S., Dollmann, M., & Geierhos, M. (2018). Improving Classifiers
for Semantic Annotation of Software Requirements with Elaborate Syntactic Structure.
International Journal of Advanced Science and Technology, 112, 123–136.
https://doi.org/10.14257/ijast.2018.112.12
bibtex: '@article{Kim_Lee_Dollmann_Geierhos_2018, title={Improving Classifiers for
Semantic Annotation of Software Requirements with Elaborate Syntactic Structure},
volume={112}, DOI={10.14257/ijast.2018.112.12},
journal={International Journal of Advanced Science and Technology}, publisher={SERSC
Australia}, author={Kim, Yeongsu and Lee, Seungwoo and Dollmann, Markus and Geierhos,
Michaela}, year={2018}, pages={123–136} }'
chicago: 'Kim, Yeongsu , Seungwoo Lee, Markus Dollmann, and Michaela Geierhos. “Improving
Classifiers for Semantic Annotation of Software Requirements with Elaborate Syntactic
Structure.” International Journal of Advanced Science and Technology 112
(2018): 123–36. https://doi.org/10.14257/ijast.2018.112.12.'
ieee: Y. Kim, S. Lee, M. Dollmann, and M. Geierhos, “Improving Classifiers for Semantic
Annotation of Software Requirements with Elaborate Syntactic Structure,” International
Journal of Advanced Science and Technology, vol. 112, pp. 123–136, 2018.
mla: Kim, Yeongsu, et al. “Improving Classifiers for Semantic Annotation of Software
Requirements with Elaborate Syntactic Structure.” International Journal of
Advanced Science and Technology, vol. 112, SERSC Australia, 2018, pp. 123–36,
doi:10.14257/ijast.2018.112.12.
short: Y. Kim, S. Lee, M. Dollmann, M. Geierhos, International Journal of Advanced
Science and Technology 112 (2018) 123–136.
date_created: 2018-04-13T09:19:22Z
date_updated: 2022-01-06T06:55:49Z
ddc:
- '000'
department:
- _id: '36'
- _id: '1'
- _id: '579'
doi: 10.14257/ijast.2018.112.12
file:
- access_level: closed
content_type: application/pdf
creator: ups
date_created: 2018-11-02T15:16:29Z
date_updated: 2018-11-02T15:16:29Z
file_id: '5297'
file_name: 12.pdf
file_size: 586968
relation: main_file
success: 1
file_date_updated: 2018-11-02T15:16:29Z
has_accepted_license: '1'
intvolume: ' 112'
keyword:
- Software Engineering
- Natural Language Processing
- Semantic Annotation
- Machine Learning
- Feature Engineering
- Syntactic Structure
language:
- iso: eng
page: 123-136
project:
- _id: '1'
name: SFB 901
- _id: '3'
name: SFB 901 - Project Area B
- _id: '9'
name: SFB 901 - Subproject B1
publication: International Journal of Advanced Science and Technology
publication_identifier:
eissn:
- 2207-6360
issn:
- 2005-4238
publication_status: published
publisher: SERSC Australia
quality_controlled: '1'
status: public
title: Improving Classifiers for Semantic Annotation of Software Requirements with
Elaborate Syntactic Structure
type: journal_article
user_id: '477'
volume: 112
year: '2018'
...
---
_id: '4411'
abstract:
- lang: eng
text: "While a lot of research in distributed computing has covered solutions for
self-stabilizing computing and topologies, there is far less work on self-stabilization
for distributed data structures.\r\nConsidering crashing peers in peer-to-peer
networks, it should not be taken for granted that a distributed data structure
remains intact.\r\nIn this work, we present a self-stabilizing protocol for a
distributed data structure called the hashed Patricia Trie (Kniesburges and Scheideler
WALCOM'11) that enables efficient prefix search on a set of keys.\r\nThe data
structure has a wide area of applications including string matching problems while
offering low overhead and efficient operations when embedded on top of a distributed
hash table.\r\nEspecially, longest prefix matching for $x$ can be done in $\\mathcal{O}(\\log
|x|)$ hash table read accesses.\r\nWe show how to maintain the structure in a
self-stabilizing way.\r\nOur protocol assures low overhead in a legal state and
a total (asymptotically optimal) memory demand of $\\Theta(d)$ bits, where $d$
is the number of bits needed for storing all keys."
author:
- first_name: Till
full_name: Knollmann, Till
id: '39241'
last_name: Knollmann
orcid: 0000-0003-2014-4696
- first_name: Christian
full_name: Scheideler, Christian
id: '20792'
last_name: Scheideler
citation:
ama: 'Knollmann T, Scheideler C. A Self-Stabilizing Hashed Patricia Trie. In: Izumi
T, Kuznetsov P, eds. Proceedings of the 20th International Symposium on Stabilization,
Safety, and Security of Distributed Systems (SSS). Vol 11201. Lecture Notes
of Computer Science. Springer, Cham; 2018. doi:10.1007/978-3-030-03232-6_1'
apa: 'Knollmann, T., & Scheideler, C. (2018). A Self-Stabilizing Hashed Patricia
Trie. In T. Izumi & P. Kuznetsov (Eds.), Proceedings of the 20th International
Symposium on Stabilization, Safety, and Security of Distributed Systems (SSS)
(Vol. 11201). Tokyo: Springer, Cham. https://doi.org/10.1007/978-3-030-03232-6_1'
bibtex: '@inproceedings{Knollmann_Scheideler_2018, series={Lecture Notes of Computer
Science}, title={A Self-Stabilizing Hashed Patricia Trie}, volume={11201}, DOI={10.1007/978-3-030-03232-6_1},
booktitle={Proceedings of the 20th International Symposium on Stabilization, Safety,
and Security of Distributed Systems (SSS)}, publisher={Springer, Cham}, author={Knollmann,
Till and Scheideler, Christian}, editor={Izumi, Taisuke and Kuznetsov, PetrEditors},
year={2018}, collection={Lecture Notes of Computer Science} }'
chicago: Knollmann, Till, and Christian Scheideler. “A Self-Stabilizing Hashed Patricia
Trie.” In Proceedings of the 20th International Symposium on Stabilization,
Safety, and Security of Distributed Systems (SSS), edited by Taisuke Izumi
and Petr Kuznetsov, Vol. 11201. Lecture Notes of Computer Science. Springer, Cham,
2018. https://doi.org/10.1007/978-3-030-03232-6_1.
ieee: T. Knollmann and C. Scheideler, “A Self-Stabilizing Hashed Patricia Trie,”
in Proceedings of the 20th International Symposium on Stabilization, Safety,
and Security of Distributed Systems (SSS), Tokyo, 2018, vol. 11201.
mla: Knollmann, Till, and Christian Scheideler. “A Self-Stabilizing Hashed Patricia
Trie.” Proceedings of the 20th International Symposium on Stabilization, Safety,
and Security of Distributed Systems (SSS), edited by Taisuke Izumi and Petr
Kuznetsov, vol. 11201, Springer, Cham, 2018, doi:10.1007/978-3-030-03232-6_1.
short: 'T. Knollmann, C. Scheideler, in: T. Izumi, P. Kuznetsov (Eds.), Proceedings
of the 20th International Symposium on Stabilization, Safety, and Security of
Distributed Systems (SSS), Springer, Cham, 2018.'
conference:
end_date: 2018-11-07
location: Tokyo
name: 20th International Symposium on Stabilization, Safety, and Security of Distributed
Systems (SSS)
start_date: 2018-11-04
date_created: 2018-09-17T13:12:18Z
date_updated: 2022-01-06T07:01:02Z
ddc:
- '000'
department:
- _id: '63'
- _id: '79'
doi: 10.1007/978-3-030-03232-6_1
editor:
- first_name: Taisuke
full_name: Izumi, Taisuke
last_name: Izumi
- first_name: Petr
full_name: Kuznetsov, Petr
last_name: Kuznetsov
external_id:
arxiv:
- '1809.04923'
file:
- access_level: closed
content_type: application/pdf
creator: ups
date_created: 2018-11-02T14:38:37Z
date_updated: 2018-11-02T14:38:37Z
file_id: '5277'
file_name: ASelf-stabilizingHashedPatrici.pdf
file_size: 500005
relation: main_file
success: 1
file_date_updated: 2018-11-02T14:38:37Z
has_accepted_license: '1'
intvolume: ' 11201'
keyword:
- Self-Stabilizing
- Prefix Search
- Distributed Data Structure
language:
- iso: eng
project:
- _id: '1'
name: SFB 901
- _id: '2'
name: SFB 901 - Project Area A
- _id: '5'
name: SFB 901 - Subproject A1
publication: Proceedings of the 20th International Symposium on Stabilization, Safety,
and Security of Distributed Systems (SSS)
publisher: Springer, Cham
series_title: Lecture Notes of Computer Science
status: public
title: A Self-Stabilizing Hashed Patricia Trie
type: conference
user_id: '39241'
volume: 11201
year: '2018'
...
---
_id: '13186'
abstract:
- lang: eng
text: Ligands DMEG6etqu, TMG6etqu, DMEG6buqu, and TMG6buqu were developed on the
basis of guanidine quinoline (GUAqu) ligands 1,3-dimethyl-N-(quinolin-8-yl)imidazolidin-2-imine
(DMEGqu) and 1,1,3,3-tetramethyl-2-(quinolin-8-yl)guanidine (TMGqu). These ligands
feature an alkyl substituent at the C6 of the quinoline backbone. The synthetic
strategy developed here enables inexpensive syntheses of any kind of C6-substituted
GUAqu ligands. On one hand, the alkylation increases the solubility of corresponding
copper complexes in apolar atom transfer radical polymerization (ATRP) monomers
like styrene. On the other hand, it has a significant electronic influence and
thus an effect on the donor properties of the new ligands. Seven CuI and CuII
complexes of DMEG6etqu and TMG6etqu have been crystallized and were studied with
regard to their structural and electrochemical properties. CuI and CuII complexes
of DMEG6buqu and TMG6buqu turned out to be perfectly soluble in pure styrene even
at room temperature, which makes them excellent catalysts in the ATRP of apolar
monomers. The key characteristics of the ATRP equilibrium, KATRP and kact, were
determined for the new complexes. In addition, we used our recently developed
DFT methodology, NBO analysis, and isodesmic reactions to predict the influence
of the introduced alkyl substituents. It turned out that high conformational freedom
in the complex structures leads to a significant uncertainty in prediction of
the thermodynamic properties.
author:
- first_name: Thomas
full_name: Rösener, Thomas
last_name: Rösener
- first_name: Alexander
full_name: Hoffmann, Alexander
last_name: Hoffmann
- first_name: Sonja
full_name: Herres-Pawlis, Sonja
last_name: Herres-Pawlis
citation:
ama: 'Rösener T, Hoffmann A, Herres-Pawlis S. Next Generation of Guanidine Quinoline
Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution
on Redox Chemistry and Solubility. European Journal of Inorganic Chemistry.
2018;2018(27):3164-3175. doi:10.1002/ejic.201800511'
apa: 'Rösener, T., Hoffmann, A., & Herres-Pawlis, S. (2018). Next Generation
of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence
of Backbone Substitution on Redox Chemistry and Solubility. European Journal
of Inorganic Chemistry, 2018(27), 3164–3175. https://doi.org/10.1002/ejic.201800511'
bibtex: '@article{Rösener_Hoffmann_Herres-Pawlis_2018, title={Next Generation of
Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence of
Backbone Substitution on Redox Chemistry and Solubility}, volume={2018}, DOI={10.1002/ejic.201800511}, number={27},
journal={European Journal of Inorganic Chemistry}, author={Rösener, Thomas and
Hoffmann, Alexander and Herres-Pawlis, Sonja}, year={2018}, pages={3164–3175}
}'
chicago: 'Rösener, Thomas, Alexander Hoffmann, and Sonja Herres-Pawlis. “Next Generation
of Guanidine Quinoline Copper Complexes for Highly Controlled ATRP: Influence
of Backbone Substitution on Redox Chemistry and Solubility.” European Journal
of Inorganic Chemistry 2018, no. 27 (2018): 3164–75. https://doi.org/10.1002/ejic.201800511.'
ieee: 'T. Rösener, A. Hoffmann, and S. Herres-Pawlis, “Next Generation of Guanidine
Quinoline Copper Complexes for Highly Controlled ATRP: Influence of Backbone Substitution
on Redox Chemistry and Solubility,” European Journal of Inorganic Chemistry,
vol. 2018, no. 27, pp. 3164–3175, 2018.'
mla: 'Rösener, Thomas, et al. “Next Generation of Guanidine Quinoline Copper Complexes
for Highly Controlled ATRP: Influence of Backbone Substitution on Redox Chemistry
and Solubility.” European Journal of Inorganic Chemistry, vol. 2018, no.
27, 2018, pp. 3164–75, doi:10.1002/ejic.201800511.'
short: T. Rösener, A. Hoffmann, S. Herres-Pawlis, European Journal of Inorganic
Chemistry 2018 (2018) 3164–3175.
date_created: 2019-09-11T11:00:06Z
date_updated: 2022-01-06T06:51:30Z
doi: 10.1002/ejic.201800511
intvolume: ' 2018'
issue: '27'
keyword:
- Copper
- Polymerization
- Redox chemistry
- Structure elucidation
- Ligand effects
language:
- iso: eng
page: 3164-3175
project:
- _id: '52'
name: Computing Resources Provided by the Paderborn Center for Parallel Computing
publication: European Journal of Inorganic Chemistry
status: public
title: 'Next Generation of Guanidine Quinoline Copper Complexes for Highly Controlled
ATRP: Influence of Backbone Substitution on Redox Chemistry and Solubility'
type: journal_article
user_id: '40778'
volume: 2018
year: '2018'
...
---
_id: '64057'
abstract:
- lang: eng
text: Self-assembly of nanoparticles (NPs) forming unique structures has been investigated
extensively over the past few years. However, many self-assembled structures by
NPs are irreversible, because they are generally constructed using their suspensions.
It is still challenging for NPs to reversibly self-assemble in dry state, let
alone of polymeric NPs with general sizes of hundreds of nm. Herein, this study
reports a new reversible self-assembly phenomenon of NPs in dry state, forming
thermoreversible strip-like supermolecular structures. These novel NPs of around
150 nm are perfluorinated surface-undecenoated cellulose nanoparticles (FSU-CNPs)
with a core-coronas structure. The thermoreversible self-assembled structure is
formed after drying in the air at the interface between FSU-CNP films and Teflon
substrates. Remarkably, the formation and dissociation of this assembled structure
are accompanied by a reversible conversion of the surface hydrophobicity, film
transparency, and anisotropic properties. These findings show novel feasibility
of reversible self-assembly of NPs in dry state, and thereby expand our knowledge
of self-assembly phenomenon.
author:
- first_name: Yonggui
full_name: Wang, Yonggui
last_name: Wang
- first_name: Pedro B.
full_name: Groszewicz, Pedro B.
last_name: Groszewicz
- first_name: Sabine
full_name: Rosenfeldt, Sabine
last_name: Rosenfeldt
- first_name: Hendrik
full_name: Schmidt, Hendrik
last_name: Schmidt
- first_name: Cynthia A.
full_name: Volkert, Cynthia A.
last_name: Volkert
- first_name: Philipp
full_name: Vana, Philipp
last_name: Vana
- first_name: Torsten
full_name: Gutmann, Torsten
id: '118165'
last_name: Gutmann
- first_name: Gerd
full_name: Buntkowsky, Gerd
last_name: Buntkowsky
- first_name: Kai
full_name: Zhang, Kai
last_name: Zhang
citation:
ama: Wang Y, Groszewicz PB, Rosenfeldt S, et al. Thermoreversible Self-Assembly
of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. Advanced
Materials. Published online 2017:1702473. doi:10.1002/adma.201702473
apa: Wang, Y., Groszewicz, P. B., Rosenfeldt, S., Schmidt, H., Volkert, C. A., Vana,
P., Gutmann, T., Buntkowsky, G., & Zhang, K. (2017). Thermoreversible Self-Assembly
of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State. Advanced
Materials, 1702473. https://doi.org/10.1002/adma.201702473
bibtex: '@article{Wang_Groszewicz_Rosenfeldt_Schmidt_Volkert_Vana_Gutmann_Buntkowsky_Zhang_2017,
title={Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles
in Dry State}, DOI={10.1002/adma.201702473},
journal={Advanced Materials}, author={Wang, Yonggui and Groszewicz, Pedro B. and
Rosenfeldt, Sabine and Schmidt, Hendrik and Volkert, Cynthia A. and Vana, Philipp
and Gutmann, Torsten and Buntkowsky, Gerd and Zhang, Kai}, year={2017}, pages={1702473}
}'
chicago: Wang, Yonggui, Pedro B. Groszewicz, Sabine Rosenfeldt, Hendrik Schmidt,
Cynthia A. Volkert, Philipp Vana, Torsten Gutmann, Gerd Buntkowsky, and Kai Zhang.
“Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles
in Dry State.” Advanced Materials, 2017, 1702473. https://doi.org/10.1002/adma.201702473.
ieee: 'Y. Wang et al., “Thermoreversible Self-Assembly of Perfluorinated
Core-Coronas Cellulose-Nanoparticles in Dry State,” Advanced Materials,
p. 1702473, 2017, doi: 10.1002/adma.201702473.'
mla: Wang, Yonggui, et al. “Thermoreversible Self-Assembly of Perfluorinated Core-Coronas
Cellulose-Nanoparticles in Dry State.” Advanced Materials, 2017, p. 1702473,
doi:10.1002/adma.201702473.
short: Y. Wang, P.B. Groszewicz, S. Rosenfeldt, H. Schmidt, C.A. Volkert, P. Vana,
T. Gutmann, G. Buntkowsky, K. Zhang, Advanced Materials (2017) 1702473.
date_created: 2026-02-07T16:16:37Z
date_updated: 2026-02-17T16:12:48Z
doi: 10.1002/adma.201702473
extern: '1'
keyword:
- nanoparticles
- self-assembly
- cellulose
- core-coronas structure
- thermoreversible
language:
- iso: eng
page: '1702473'
publication: Advanced Materials
status: public
title: Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles
in Dry State
type: journal_article
user_id: '100715'
year: '2017'
...
---
_id: '191'
abstract:
- lang: eng
text: One purpose of requirement refinement is that higher-level requirements have
to be translated to something usable by developers. Since customer requirements
are often written in natural language by end users, they lack precision, completeness
and consistency. Although user stories are often used in the requirement elicitation
process in order to describe the possibilities how to interact with the software,
there is always something unspoken. Here, we present techniques how to automatically
refine vague software descriptions. Thus, we can bridge the gap by first revising
natural language utterances from higher-level to more detailed customer requirements,
before functionality matters. We therefore focus on the resolution of semantically
incomplete user-generated sentences (i.e. non-instantiated arguments of predicates)
and provide ontology-based gap-filling suggestions how to complete unverbalized
information in the user’s demand.
author:
- first_name: Michaela
full_name: Geierhos, Michaela
id: '42496'
last_name: Geierhos
orcid: 0000-0002-8180-5606
- first_name: Frederik Simon
full_name: Bäumer, Frederik Simon
id: '38837'
last_name: Bäumer
citation:
ama: 'Geierhos M, Bäumer FS. How to Complete Customer Requirements: Using Concept
Expansion for Requirement Refinement. In: Métais E, Meziane F, Saraee M, Sugumaran
V, Vadera S, eds. Proceedings of the 21st International Conference on Applications
of Natural Language to Information Systems (NLDB). Vol 9612. Lecture Notes
in Computer Science. Cham, Switzerland: Springer; 2016:37-47. doi:10.1007/978-3-319-41754-7_4'
apa: 'Geierhos, M., & Bäumer, F. S. (2016). How to Complete Customer Requirements:
Using Concept Expansion for Requirement Refinement. In E. Métais, F. Meziane,
M. Saraee, V. Sugumaran, & S. Vadera (Eds.), Proceedings of the 21st International
Conference on Applications of Natural Language to Information Systems (NLDB)
(Vol. 9612, pp. 37–47). Cham, Switzerland: Springer. https://doi.org/10.1007/978-3-319-41754-7_4'
bibtex: '@inproceedings{Geierhos_Bäumer_2016, place={Cham, Switzerland}, series={Lecture
Notes in Computer Science}, title={How to Complete Customer Requirements: Using
Concept Expansion for Requirement Refinement}, volume={9612}, DOI={10.1007/978-3-319-41754-7_4},
booktitle={Proceedings of the 21st International Conference on Applications of
Natural Language to Information Systems (NLDB)}, publisher={Springer}, author={Geierhos,
Michaela and Bäumer, Frederik Simon}, editor={Métais, Elisabeth and Meziane,
Farid and Saraee, Mohamad and Sugumaran, Vijayan and Vadera, Sunil Editors},
year={2016}, pages={37–47}, collection={Lecture Notes in Computer Science} }'
chicago: 'Geierhos, Michaela, and Frederik Simon Bäumer. “How to Complete Customer
Requirements: Using Concept Expansion for Requirement Refinement.” In Proceedings
of the 21st International Conference on Applications of Natural Language to Information
Systems (NLDB), edited by Elisabeth Métais, Farid Meziane, Mohamad Saraee,
Vijayan Sugumaran, and Sunil Vadera, 9612:37–47. Lecture Notes in Computer Science.
Cham, Switzerland: Springer, 2016. https://doi.org/10.1007/978-3-319-41754-7_4.'
ieee: 'M. Geierhos and F. S. Bäumer, “How to Complete Customer Requirements: Using
Concept Expansion for Requirement Refinement,” in Proceedings of the 21st International
Conference on Applications of Natural Language to Information Systems (NLDB),
Salford, UK, 2016, vol. 9612, pp. 37–47.'
mla: 'Geierhos, Michaela, and Frederik Simon Bäumer. “How to Complete Customer Requirements:
Using Concept Expansion for Requirement Refinement.” Proceedings of the 21st
International Conference on Applications of Natural Language to Information Systems
(NLDB), edited by Elisabeth Métais et al., vol. 9612, Springer, 2016, pp.
37–47, doi:10.1007/978-3-319-41754-7_4.'
short: 'M. Geierhos, F.S. Bäumer, in: E. Métais, F. Meziane, M. Saraee, V. Sugumaran,
S. Vadera (Eds.), Proceedings of the 21st International Conference on Applications
of Natural Language to Information Systems (NLDB), Springer, Cham, Switzerland,
2016, pp. 37–47.'
conference:
end_date: 2016-06-24
location: Salford, UK
name: 21st International Conference on Applications of Natural Language to Information
Systems (NLDB 2016)
start_date: 2016-06-22
date_created: 2017-10-17T12:41:29Z
date_updated: 2022-01-06T06:53:58Z
ddc:
- '040'
department:
- _id: '36'
- _id: '1'
- _id: '579'
doi: 10.1007/978-3-319-41754-7_4
editor:
- first_name: 'Elisabeth '
full_name: 'Métais, Elisabeth '
last_name: Métais
- first_name: 'Farid '
full_name: 'Meziane, Farid '
last_name: Meziane
- first_name: 'Mohamad '
full_name: 'Saraee, Mohamad '
last_name: Saraee
- first_name: 'Vijayan '
full_name: 'Sugumaran, Vijayan '
last_name: Sugumaran
- first_name: 'Sunil '
full_name: 'Vadera, Sunil '
last_name: Vadera
file:
- access_level: closed
content_type: application/pdf
creator: florida
date_created: 2018-03-21T12:29:37Z
date_updated: 2018-03-21T12:29:37Z
file_id: '1528'
file_name: 191-chp_3A10.1007_2F978-3-319-41754-7_4.pdf
file_size: 1499075
relation: main_file
success: 1
file_date_updated: 2018-03-21T12:29:37Z
has_accepted_license: '1'
intvolume: ' 9612'
keyword:
- Requirement refinement
- Concept expansion
- Ontology-based instantiation of predicate-argument structure
language:
- iso: eng
page: 37-47
place: Cham, Switzerland
project:
- _id: '1'
name: SFB 901
- _id: '3'
name: SFB 901 - Project Area B
- _id: '9'
name: SFB 901 - Subproject B1
publication: Proceedings of the 21st International Conference on Applications of Natural
Language to Information Systems (NLDB)
publication_identifier:
eisbn:
- 978-3-319-41754-7
isbn:
- 978-3-319-41753-0
publication_status: published
publisher: Springer
quality_controlled: '1'
series_title: Lecture Notes in Computer Science
status: public
title: 'How to Complete Customer Requirements: Using Concept Expansion for Requirement
Refinement'
type: conference
user_id: '477'
volume: 9612
year: '2016'
...
---
_id: '34439'
abstract:
- lang: eng
text: A method for the reconstruction of turned shaft surfaces with a (fractal)
Weierstrass–Mandelbrot-function (WMF) is presented. The WMF is modified to allow
to freely choose a phase-shift for every frequency. The reconstruction is based
on distinct profiles in axial and tangential direction and the statistical distribution
of low-wavelength portions of the surface is taken into account by adding t-distributed
random deviations to the surface. The work is validated by reconstructing measured
shaft surfaces with different manufacturing parameters, which shows good accuracy
for periodic surfaces. This method allows for a characterization of surfaces with
a limited number of parameters and can be used to store the characteristics of
measured surfaces with a reduced amount of data compared to a point-cloud surface.
author:
- first_name: Stefan
full_name: Thielen, Stefan
last_name: Thielen
- first_name: Balázs
full_name: Magyar, Balázs
id: '97759'
last_name: Magyar
- first_name: Attila
full_name: Piros, Attila
last_name: Piros
citation:
ama: Thielen S, Magyar B, Piros A. Reconstruction of three-dimensional turned shaft
surfaces with fractal functions. Tribology International. 2016;95:349-357.
doi:https://doi.org/10.1016/j.triboint.2015.11.028
apa: Thielen, S., Magyar, B., & Piros, A. (2016). Reconstruction of three-dimensional
turned shaft surfaces with fractal functions. Tribology International,
95, 349–357. https://doi.org/10.1016/j.triboint.2015.11.028
bibtex: '@article{Thielen_Magyar_Piros_2016, title={Reconstruction of three-dimensional
turned shaft surfaces with fractal functions}, volume={95}, DOI={https://doi.org/10.1016/j.triboint.2015.11.028},
journal={Tribology International}, author={Thielen, Stefan and Magyar, Balázs
and Piros, Attila}, year={2016}, pages={349–357} }'
chicago: 'Thielen, Stefan, Balázs Magyar, and Attila Piros. “Reconstruction of Three-Dimensional
Turned Shaft Surfaces with Fractal Functions.” Tribology International
95 (2016): 349–57. https://doi.org/10.1016/j.triboint.2015.11.028.'
ieee: 'S. Thielen, B. Magyar, and A. Piros, “Reconstruction of three-dimensional
turned shaft surfaces with fractal functions,” Tribology International,
vol. 95, pp. 349–357, 2016, doi: https://doi.org/10.1016/j.triboint.2015.11.028.'
mla: Thielen, Stefan, et al. “Reconstruction of Three-Dimensional Turned Shaft Surfaces
with Fractal Functions.” Tribology International, vol. 95, 2016, pp. 349–57,
doi:https://doi.org/10.1016/j.triboint.2015.11.028.
short: S. Thielen, B. Magyar, A. Piros, Tribology International 95 (2016) 349–357.
date_created: 2022-12-15T09:56:44Z
date_updated: 2022-12-15T09:56:59Z
department:
- _id: '146'
doi: https://doi.org/10.1016/j.triboint.2015.11.028
extern: '1'
intvolume: ' 95'
keyword:
- Roughness
- Structure
- Fractal
- Machining
language:
- iso: eng
page: 349-357
publication: Tribology International
publication_identifier:
issn:
- 0301-679X
status: public
title: Reconstruction of three-dimensional turned shaft surfaces with fractal functions
type: journal_article
user_id: '38077'
volume: 95
year: '2016'
...
---
_id: '5195'
abstract:
- lang: eng
text: 'This article analyses 336 German venture capital transactions from 1990 to
2005 and seeks to determine why selected financial securities differ across deals.
We find that a broad array of financial instruments is used, covering straight
equity, mezzanine and debt‐like securities. Based on the chosen financial securities’
upside potential and downside protection characteristics, we provide an explanation
for the differing use of these securities. Our results show that investors’ deal
experience, adverse selection risks and economic prospects in the public equity
market influence the selection of financial securities. '
article_type: original
author:
- first_name: Thomas
full_name: Hartmann-Wendels, Thomas
last_name: Hartmann-Wendels
- first_name: Georg
full_name: Keienburg, Georg
last_name: Keienburg
- first_name: Sönke
full_name: Sievers, Sönke
id: '46447'
last_name: Sievers
citation:
ama: 'Hartmann-Wendels T, Keienburg G, Sievers S. Adverse selection, investor experience
and security choice in venture capital finance: evidence from Germany. European
Financial Management (VHB-JOURQUAL 4 Ranking B). 2011;17(3):464-499. doi:10.1111/j.1468-036X.2010.00568.x'
apa: 'Hartmann-Wendels, T., Keienburg, G., & Sievers, S. (2011). Adverse selection,
investor experience and security choice in venture capital finance: evidence from
Germany. European Financial Management (VHB-JOURQUAL 4 Ranking B), 17(3),
464–499. https://doi.org/10.1111/j.1468-036X.2010.00568.x'
bibtex: '@article{Hartmann-Wendels_Keienburg_Sievers_2011, title={Adverse selection,
investor experience and security choice in venture capital finance: evidence from
Germany}, volume={17}, DOI={10.1111/j.1468-036X.2010.00568.x},
number={3}, journal={European Financial Management (VHB-JOURQUAL 4 Ranking B)},
publisher={Wiley Online Library}, author={Hartmann-Wendels, Thomas and Keienburg,
Georg and Sievers, Sönke}, year={2011}, pages={464–499} }'
chicago: 'Hartmann-Wendels, Thomas, Georg Keienburg, and Sönke Sievers. “Adverse
Selection, Investor Experience and Security Choice in Venture Capital Finance:
Evidence from Germany.” European Financial Management (VHB-JOURQUAL 4 Ranking
B) 17, no. 3 (2011): 464–99. https://doi.org/10.1111/j.1468-036X.2010.00568.x.'
ieee: 'T. Hartmann-Wendels, G. Keienburg, and S. Sievers, “Adverse selection, investor
experience and security choice in venture capital finance: evidence from Germany,”
European Financial Management (VHB-JOURQUAL 4 Ranking B), vol. 17, no.
3, pp. 464–499, 2011, doi: 10.1111/j.1468-036X.2010.00568.x.'
mla: 'Hartmann-Wendels, Thomas, et al. “Adverse Selection, Investor Experience and
Security Choice in Venture Capital Finance: Evidence from Germany.” European
Financial Management (VHB-JOURQUAL 4 Ranking B), vol. 17, no. 3, Wiley Online
Library, 2011, pp. 464–99, doi:10.1111/j.1468-036X.2010.00568.x.'
short: T. Hartmann-Wendels, G. Keienburg, S. Sievers, European Financial Management
(VHB-JOURQUAL 4 Ranking B) 17 (2011) 464–499.
date_created: 2018-10-31T11:39:27Z
date_updated: 2026-04-09T08:01:03Z
department:
- _id: '275'
doi: 10.1111/j.1468-036X.2010.00568.x
extern: '1'
intvolume: ' 17'
issue: '3'
jel:
- G24
- G32
keyword:
- venture capital
- capital structure
- contract theory
- deal experience
language:
- iso: eng
main_file_link:
- url: https://onlinelibrary.wiley.com/doi/full/10.1111/j.1468-036X.2010.00568.x
page: 464-499
publication: European Financial Management (VHB-JOURQUAL 4 Ranking B)
publication_status: published
publisher: Wiley Online Library
quality_controlled: '1'
status: public
title: 'Adverse selection, investor experience and security choice in venture capital
finance: evidence from Germany'
type: journal_article
user_id: '115848'
volume: 17
year: '2011'
...
---
_id: '4406'
abstract:
- lang: eng
text: Using aggregate balance sheet data from banks across the EU-25 over the period
from 1997 to 2005 we provide empirical evidence that national banking market concentration
has a negative impact on European banks’ financial soundness as measured by the
Z-score technique while controlling for macroeconomic, bank-specific, regulatory,
and institutional factors. Furthermore, our analysis reveals that Eastern European
banking markets exhibiting a lower level of competitive pressure, fewer diversification
opportunities and a higher fraction of government-owned banks are more prone to
financial fragility whereas capital regulations have supported financial stability
across the entire European Union.
author:
- first_name: André
full_name: Uhde, André
id: '36049'
last_name: Uhde
orcid: https://orcid.org/0000-0002-8058-8857
- first_name: Ulrich
full_name: Heimeshoff, Ulrich
last_name: Heimeshoff
citation:
ama: 'Uhde A, Heimeshoff U. Consolidation in banking and financial stability in
Europe: Empirical evidence. Journal of Banking & Finance. 2009;33(7):1299-1311.
doi:https://doi.org/10.1016/j.jbankfin.2009.01.006'
apa: 'Uhde, A., & Heimeshoff, U. (2009). Consolidation in banking and financial
stability in Europe: Empirical evidence. Journal of Banking & Finance,
33(7), 1299–1311. https://doi.org/10.1016/j.jbankfin.2009.01.006'
bibtex: '@article{Uhde_Heimeshoff_2009, title={Consolidation in banking and financial
stability in Europe: Empirical evidence}, volume={33}, DOI={https://doi.org/10.1016/j.jbankfin.2009.01.006},
number={7}, journal={Journal of Banking & Finance}, author={Uhde, André and
Heimeshoff, Ulrich}, year={2009}, pages={1299–1311} }'
chicago: 'Uhde, André, and Ulrich Heimeshoff. “Consolidation in Banking and Financial
Stability in Europe: Empirical Evidence.” Journal of Banking & Finance
33, no. 7 (2009): 1299–1311. https://doi.org/10.1016/j.jbankfin.2009.01.006.'
ieee: 'A. Uhde and U. Heimeshoff, “Consolidation in banking and financial stability
in Europe: Empirical evidence,” Journal of Banking & Finance, vol.
33, no. 7, pp. 1299–1311, 2009, doi: https://doi.org/10.1016/j.jbankfin.2009.01.006.'
mla: 'Uhde, André, and Ulrich Heimeshoff. “Consolidation in Banking and Financial
Stability in Europe: Empirical Evidence.” Journal of Banking & Finance,
vol. 33, no. 7, 2009, pp. 1299–311, doi:https://doi.org/10.1016/j.jbankfin.2009.01.006.'
short: A. Uhde, U. Heimeshoff, Journal of Banking & Finance 33 (2009) 1299–1311.
date_created: 2018-09-14T13:02:19Z
date_updated: 2023-01-10T09:36:22Z
department:
- _id: '186'
- _id: '188'
doi: https://doi.org/10.1016/j.jbankfin.2009.01.006
extern: '1'
intvolume: ' 33'
issue: '7'
jel:
- G21
- G28
- G34
- L16
keyword:
- Market structure
- Financial stability
- Banking regulation
language:
- iso: eng
page: 1299-1311
publication: Journal of Banking & Finance
publication_status: published
status: public
title: 'Consolidation in banking and financial stability in Europe: Empirical evidence'
type: journal_article
user_id: '21810'
volume: 33
year: '2009'
...
---
_id: '11733'
abstract:
- lang: eng
text: Current navigation systems like GPS (Global Positioning System) and its Russian
counterpart GLONASS (Global Navigation Satellite System) only evaluate the direct
signal path. The receivers treat the reflected paths also reaching the receiver
antenna as disturbance which has to be suppressed. Multipath affects the tracking
accuracy by resulting in a degeneration of the S-curve of the DLL (delay locked
loop). Nowadays the future European systems GALILEO and GPSIIF/III with two new
signals are on the way to the market and it is time to think about new receiver
structures. Therefore we investigated if it is possible to use multipath for navigation
constructively.
author:
- first_name: Renke
full_name: Bischoff, Renke
last_name: Bischoff
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
- first_name: Wolfgang
full_name: Schulz, Wolfgang
last_name: Schulz
- first_name: Guenther
full_name: Heinrichs, Guenther
last_name: Heinrichs
citation:
ama: 'Bischoff R, Haeb-Umbach R, Schulz W, Heinrichs G. Employment of a multipath
receiver structure in a combined GALILEO/UMTS receiver. In: IEEE 55th Vehicular
Technology Conference (VTC 2002 Spring). Vol 4. ; 2002:1844-1848 vol.4. doi:10.1109/VTC.2002.1002940'
apa: Bischoff, R., Haeb-Umbach, R., Schulz, W., & Heinrichs, G. (2002). Employment
of a multipath receiver structure in a combined GALILEO/UMTS receiver. In IEEE
55th Vehicular Technology Conference (VTC 2002 Spring) (Vol. 4, pp. 1844–1848
vol.4). https://doi.org/10.1109/VTC.2002.1002940
bibtex: '@inproceedings{Bischoff_Haeb-Umbach_Schulz_Heinrichs_2002, title={Employment
of a multipath receiver structure in a combined GALILEO/UMTS receiver}, volume={4},
DOI={10.1109/VTC.2002.1002940},
booktitle={IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)}, author={Bischoff,
Renke and Haeb-Umbach, Reinhold and Schulz, Wolfgang and Heinrichs, Guenther},
year={2002}, pages={1844–1848 vol.4} }'
chicago: Bischoff, Renke, Reinhold Haeb-Umbach, Wolfgang Schulz, and Guenther Heinrichs.
“Employment of a Multipath Receiver Structure in a Combined GALILEO/UMTS Receiver.”
In IEEE 55th Vehicular Technology Conference (VTC 2002 Spring), 4:1844–48
vol.4, 2002. https://doi.org/10.1109/VTC.2002.1002940.
ieee: R. Bischoff, R. Haeb-Umbach, W. Schulz, and G. Heinrichs, “Employment of a
multipath receiver structure in a combined GALILEO/UMTS receiver,” in IEEE
55th Vehicular Technology Conference (VTC 2002 Spring), 2002, vol. 4, pp.
1844–1848 vol.4.
mla: Bischoff, Renke, et al. “Employment of a Multipath Receiver Structure in a
Combined GALILEO/UMTS Receiver.” IEEE 55th Vehicular Technology Conference
(VTC 2002 Spring), vol. 4, 2002, pp. 1844–48 vol.4, doi:10.1109/VTC.2002.1002940.
short: 'R. Bischoff, R. Haeb-Umbach, W. Schulz, G. Heinrichs, in: IEEE 55th Vehicular
Technology Conference (VTC 2002 Spring), 2002, pp. 1844–1848 vol.4.'
date_created: 2019-07-12T05:27:12Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
doi: 10.1109/VTC.2002.1002940
intvolume: ' 4'
keyword:
- combined GALILEO/UMTS receiver
- delay locked loop
- delay lock loops
- DLL
- Global Positioning System
- GLONASS
- GPS
- GPSIIF/III
- mobile satellite communication
- multipath channels
- multipath receiver structure
- radio receivers
- RAKE receiver
- S-curve
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2002/BiHaScHe02.pdf
oa: '1'
page: 1844-1848 vol.4
publication: IEEE 55th Vehicular Technology Conference (VTC 2002 Spring)
status: public
title: Employment of a multipath receiver structure in a combined GALILEO/UMTS receiver
type: conference
user_id: '44006'
volume: 4
year: '2002'
...
---
_id: '34447'
abstract:
- lang: eng
text: "The Object Constraint Language (OCL) was introduced to support the specification
of constraints for UML diagrams and is mainly used to formulate invariants and
operation pre- and postconditions. Though OCL is also applied in behavioral diagrams,
e.g., as guards for state transitions, it is currently not possible to specify
constraints concerning the dynamic behavior and timing properties of such diagrams.\r\n\r\nThis
article discusses OCL’s application for the dynamic behavior of UML Statechart
diagrams and presents an OCL extension for specification of state-oriented time-bounded
constraints.We introduce operations to extract state configurations from diagrams
and define additional predicates over states and state configurations. The semantics
of our OCL extension is given by employing time-bounded Computational Tree Logic
(CTL) formulae. An example of a flexible manufacturing system with automated guided
vehicles demonstrates the application of our extension."
author:
- first_name: Stephan
full_name: Flake, Stephan
last_name: Flake
- first_name: Wolfgang
full_name: Müller, Wolfgang
id: '16243'
last_name: Müller
citation:
ama: 'Flake S, Müller W. An OCL Extension for Real-Time Constraints. In: Clark T,
Warmer J, eds. Advances in Object Modelling with the OCL. Springer-Verlag;
2002:150-171. doi:10.1007/3-540-45669-4_8'
apa: Flake, S., & Müller, W. (2002). An OCL Extension for Real-Time Constraints.
In T. Clark & J. Warmer (Eds.), Advances in Object Modelling with the OCL
(pp. 150–171). Springer-Verlag. https://doi.org/10.1007/3-540-45669-4_8
bibtex: '@inbook{Flake_Müller_2002, place={Berlin, Heidelberg}, title={An OCL Extension
for Real-Time Constraints}, DOI={10.1007/3-540-45669-4_8},
booktitle={Advances in Object Modelling with the OCL}, publisher={Springer-Verlag},
author={Flake, Stephan and Müller, Wolfgang}, editor={Clark, T. and Warmer, J.},
year={2002}, pages={150–171} }'
chicago: 'Flake, Stephan, and Wolfgang Müller. “An OCL Extension for Real-Time Constraints.”
In Advances in Object Modelling with the OCL, edited by T. Clark and J.
Warmer, 150–71. Berlin, Heidelberg: Springer-Verlag, 2002. https://doi.org/10.1007/3-540-45669-4_8.'
ieee: 'S. Flake and W. Müller, “An OCL Extension for Real-Time Constraints,” in
Advances in Object Modelling with the OCL, T. Clark and J. Warmer, Eds.
Berlin, Heidelberg: Springer-Verlag, 2002, pp. 150–171.'
mla: Flake, Stephan, and Wolfgang Müller. “An OCL Extension for Real-Time Constraints.”
Advances in Object Modelling with the OCL, edited by T. Clark and J. Warmer,
Springer-Verlag, 2002, pp. 150–71, doi:10.1007/3-540-45669-4_8.
short: 'S. Flake, W. Müller, in: T. Clark, J. Warmer (Eds.), Advances in Object
Modelling with the OCL, Springer-Verlag, Berlin, Heidelberg, 2002, pp. 150–171.'
date_created: 2022-12-15T11:38:20Z
date_updated: 2022-12-15T11:38:47Z
department:
- _id: '672'
doi: 10.1007/3-540-45669-4_8
editor:
- first_name: T.
full_name: Clark, T.
last_name: Clark
- first_name: J.
full_name: Warmer, J.
last_name: Warmer
keyword:
- Model Check Temporal Logic Object Constraint Language Execution Path Kripke
Structure
language:
- iso: eng
page: 150 - 171
place: Berlin, Heidelberg
publication: Advances in Object Modelling with the OCL
publication_identifier:
isbn:
- 978-3-540-45669-8
publisher: Springer-Verlag
status: public
title: An OCL Extension for Real-Time Constraints
type: book_chapter
user_id: '5786'
year: '2002'
...