---
_id: '59995'
abstract:
- lang: eng
text: "Abstract\r\n Ultrasonic transmission
measurements can be used for material characterization, as the propagation time
of sound waves and thus their velocity depends on the elastic material parameters.
Measurement results for the elastic material parameters are acquired non-destructively
using ultrasonic transmission measurements of hollow cylindrical polymer specimens.
To determine the material parameters, an inverse approach is used comparing measurements
with simulated data. Previous studies show that the procedure exhibits low sensitivity
with respect to the shear parameters of the material. In order to increase the
sensitivity, we propose to apply a spatially annular excitation on the base of
the specimen. As a measure to analyse the sensitivities with respect to all parameters
and their linear independence, we observe the volume of the parallelotope of the
sensitivity vectors. Here, a scaled boundary finite element formulation of wave
propagation in the specimen is expanded to yield derivative information directly,
and a sensitivity analysis can be carried out efficiently. Finally, the results
of this sensitivity analysis with regard to the annular excitation are also applied
to the measurement setup."
article_number: '6'
article_type: original
author:
- first_name: Dmitrij
full_name: Dreiling, Dmitrij
id: '32616'
last_name: Dreiling
- first_name: Dominik
full_name: Itner, Dominik
last_name: Itner
- first_name: Hauke
full_name: Gravenkamp, Hauke
last_name: Gravenkamp
- first_name: Leander
full_name: Claes, Leander
id: '11829'
last_name: Claes
orcid: 0000-0002-4393-268X
- first_name: Carolin
full_name: Birk, Carolin
last_name: Birk
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: Dreiling D, Itner D, Gravenkamp H, Claes L, Birk C, Henning B. Increasing the
sensitivity of ultrasonic transmission measurements for elastic material parameter
estimation. Measurement Science and Technology. 2025;36. doi:10.1088/1361-6501/add9b6
apa: Dreiling, D., Itner, D., Gravenkamp, H., Claes, L., Birk, C., & Henning,
B. (2025). Increasing the sensitivity of ultrasonic transmission measurements
for elastic material parameter estimation. Measurement Science and Technology,
36, Article 6. https://doi.org/10.1088/1361-6501/add9b6
bibtex: '@article{Dreiling_Itner_Gravenkamp_Claes_Birk_Henning_2025, title={Increasing
the sensitivity of ultrasonic transmission measurements for elastic material parameter
estimation}, volume={36}, DOI={10.1088/1361-6501/add9b6},
number={6}, journal={Measurement Science and Technology}, publisher={IOP Publishing},
author={Dreiling, Dmitrij and Itner, Dominik and Gravenkamp, Hauke and Claes,
Leander and Birk, Carolin and Henning, Bernd}, year={2025} }'
chicago: Dreiling, Dmitrij, Dominik Itner, Hauke Gravenkamp, Leander Claes, Carolin
Birk, and Bernd Henning. “Increasing the Sensitivity of Ultrasonic Transmission
Measurements for Elastic Material Parameter Estimation.” Measurement Science
and Technology 36 (2025). https://doi.org/10.1088/1361-6501/add9b6.
ieee: 'D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, and B. Henning,
“Increasing the sensitivity of ultrasonic transmission measurements for elastic
material parameter estimation,” Measurement Science and Technology, vol.
36, Art. no. 6, 2025, doi: 10.1088/1361-6501/add9b6.'
mla: Dreiling, Dmitrij, et al. “Increasing the Sensitivity of Ultrasonic Transmission
Measurements for Elastic Material Parameter Estimation.” Measurement Science
and Technology, vol. 36, 6, IOP Publishing, 2025, doi:10.1088/1361-6501/add9b6.
short: D. Dreiling, D. Itner, H. Gravenkamp, L. Claes, C. Birk, B. Henning, Measurement
Science and Technology 36 (2025).
date_created: 2025-05-19T13:30:39Z
date_updated: 2025-05-27T15:03:38Z
department:
- _id: '49'
doi: 10.1088/1361-6501/add9b6
funded_apc: '1'
intvolume: ' 36'
keyword:
- Sensitivity analysis
- Ultrasonic transducer
- Guided waves
- Polymers
- Gram determinant
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://iopscience.iop.org/article/10.1088/1361-6501/add9b6
oa: '1'
project:
- _id: '89'
grant_number: '409779252'
name: 'VaMP: Vollständige Bestimmung der akustischen Materialparameter von Polymeren'
publication: Measurement Science and Technology
publication_identifier:
issn:
- 0957-0233
- 1361-6501
publication_status: published
publisher: IOP Publishing
quality_controlled: '1'
status: public
title: Increasing the sensitivity of ultrasonic transmission measurements for elastic
material parameter estimation
type: journal_article
user_id: '32616'
volume: 36
year: '2025'
...
---
_id: '58917'
abstract:
- lang: ger
text: 'Auslandsaufenthalte von Studierenden sind im Fach Musikwissenschaft an der
Universität Paderborn eher eine Ausnahme. Das hat unterschiedliche Gründe, unter
anderem die nicht vorhandene curriculare Verankerung. Dabei belegen diverse Untersuchungen,
dass solche Aufenthalte den interkulturellen Kompetenzerwerb und damit Fähigkeiten
fördern, die unabhängig vom Fach in einer globalisierten Welt immer größere Relevanz
im Berufsleben einnehmen. Im Projekt wurde ein hybrides internationales Kooperationsseminar
entwickelt und durchgeführt sowie in Bezug auf den Erwerb dieser wichtigen Schlüsselqualifikation
evaluiert. Die Auswertung der unter anderem durch Fragebögen erhobenen Entwicklung
konnte deutlich die positiven Auswirkungen eines hybriden Kooperationsseminars
auf interkulturelle Kompetenzen, die Auseinandersetzung mit verschiedensten Aspekten
einer anderen Kultur, darunter Geschichte, Politik, (Post-)Kolonialismus und den
eigenen Privilegien aufzeigen. Zudem lassen sich aus der Evaluation weitere Ideen
für rein digitale Formate ableiten. '
- lang: eng
text: "Stays abroad by musicology students at the Paderborn University are the exception
rather than the\r\nrule. There are various reasons for this, including the fact
that they are not part of the curriculum.\r\nHowever, various studies have shown
that such stays support the acquisition of intercultural skills\r\nwhich are becoming
increasingly relevant in professional life in a globalised world, regardless of
the\r\nsubject. The project developed, implemented, and evaluated a hybrid international
cooperation semi-\r\nnar regarding the acquisition of this important key qualification.
The evaluation of the course of the\r\nseminar, based among other things on questionnaires,
clearly showed the positive effects of a hybrid\r\ncooperation seminar on intercultural
competences, the examination of different aspects of another\r\nculture, including
history, politics, (post-)colonialism and one's own privileges. In addition, the
eval-\r\nuation can be used to derive further ideas for purely digital formats."
author:
- first_name: Luise
full_name: Adler, Luise
id: '93940'
last_name: Adler
orcid: 0009-0002-0150-2638
citation:
ama: Adler L. Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider
Kooperationsseminare. Paderborner Beiträge 2024 die hochschullehre - Themenheft
2025. 2025;11(17):218-231. doi:10.3278/HSL2459W
apa: Adler, L. (2025). Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale
hybrider Kooperationsseminare. Paderborner Beiträge 2024. die hochschullehre
- Themenheft 2025, 11(17), 218–231. https://doi.org/10.3278/HSL2459W
bibtex: '@article{Adler_2025, title={Interkulturelle Kompetenzen in der Musikwissenschaft.
Potenziale hybrider Kooperationsseminare}, volume={11}, DOI={10.3278/HSL2459W},
number={17}, journal={Paderborner Beiträge 2024. die hochschullehre - Themenheft
2025}, publisher={Nerea Vöing, Diana Bücker}, author={Adler, Luise}, year={2025},
pages={218–231} }'
chicago: 'Adler, Luise. “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale
hybrider Kooperationsseminare.” Paderborner Beiträge 2024. die hochschullehre
- Themenheft 2025 11, no. 17 (2025): 218–31. https://doi.org/10.3278/HSL2459W.'
ieee: 'L. Adler, “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale
hybrider Kooperationsseminare,” Paderborner Beiträge 2024. die hochschullehre
- Themenheft 2025, vol. 11, no. 17, pp. 218–231, 2025, doi: 10.3278/HSL2459W.'
mla: Adler, Luise. “Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale
hybrider Kooperationsseminare.” Paderborner Beiträge 2024. die hochschullehre
- Themenheft 2025, vol. 11, no. 17, Nerea Vöing, Diana Bücker, 2025, pp. 218–31,
doi:10.3278/HSL2459W.
short: L. Adler, Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025
11 (2025) 218–231.
date_created: 2025-03-05T13:12:01Z
date_updated: 2025-03-05T13:13:01Z
department:
- _id: '233'
doi: 10.3278/HSL2459W
intvolume: ' 11'
issue: '17'
keyword:
- interkulturelle Kompetenz
- interkulturelle Sensitivität
- Musikwissenschaft
- digitale Lehre
- hybride Lehre
- intercultural competence
- intercultural sensitivity
- musicology
- digital education
- hybrid education
language:
- iso: ger
main_file_link:
- open_access: '1'
url: https://www.wbv.de/shop/Paderborner-Beitraege-2024-HSLT2404W
oa: '1'
page: 218 - 231
publication: Paderborner Beiträge 2024. die hochschullehre - Themenheft 2025
publication_identifier:
unknown:
- 2199-8825
publication_status: published
publisher: Nerea Vöing, Diana Bücker
status: public
title: Interkulturelle Kompetenzen in der Musikwissenschaft. Potenziale hybrider Kooperationsseminare
type: journal_article
user_id: '93940'
volume: 11
year: '2025'
...
---
_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: '20678'
author:
- first_name: Christian Roman
full_name: Bielak, Christian Roman
id: '34782'
last_name: Bielak
- first_name: Max
full_name: Böhnke, Max
id: '45779'
last_name: Böhnke
- first_name: Robert
full_name: Beck, Robert
id: '38279'
last_name: Beck
- 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: Bielak CR, Böhnke M, Beck R, Bobbert M, Meschut G. Numerical analysis of the
robustness of clinching process considering the pre-forming of the parts . Journal
of Advanced Joining Processes . Published online 2020. doi:https://doi.org/10.1016/j.jajp.2020.100038
apa: Bielak, C. R., Böhnke, M., Beck, R., Bobbert, M., & Meschut, G. (2020).
Numerical analysis of the robustness of clinching process considering the pre-forming
of the parts . Journal of Advanced Joining Processes. . https://doi.org/10.1016/j.jajp.2020.100038
bibtex: '@article{Bielak_Böhnke_Beck_Bobbert_Meschut_2020, title={Numerical analysis
of the robustness of clinching process considering the pre-forming of the parts
}, DOI={https://doi.org/10.1016/j.jajp.2020.100038},
journal={Journal of Advanced Joining Processes. }, publisher={Elsevier}, author={Bielak,
Christian Roman and Böhnke, Max and Beck, Robert and Bobbert, Mathias and Meschut,
Gerson}, year={2020} }'
chicago: Bielak, Christian Roman, Max Böhnke, Robert Beck, Mathias Bobbert, and
Gerson Meschut. “Numerical Analysis of the Robustness of Clinching Process Considering
the Pre-Forming of the Parts .” Journal of Advanced Joining Processes. ,
2020. https://doi.org/10.1016/j.jajp.2020.100038.
ieee: 'C. R. Bielak, M. Böhnke, R. Beck, M. Bobbert, and G. Meschut, “Numerical
analysis of the robustness of clinching process considering the pre-forming of
the parts ,” Journal of Advanced Joining Processes. , 2020, doi: https://doi.org/10.1016/j.jajp.2020.100038.'
mla: Bielak, Christian Roman, et al. “Numerical Analysis of the Robustness of Clinching
Process Considering the Pre-Forming of the Parts .” Journal of Advanced Joining
Processes. , Elsevier, 2020, doi:https://doi.org/10.1016/j.jajp.2020.100038.
short: C.R. Bielak, M. Böhnke, R. Beck, M. Bobbert, G. Meschut, Journal of Advanced
Joining Processes. (2020).
date_created: 2020-12-02T16:21:34Z
date_updated: 2022-03-24T09:39:11Z
department:
- _id: '157'
doi: https://doi.org/10.1016/j.jajp.2020.100038
keyword:
- Clinching
- process simulation
- FEM
- pre-straining
- sensitivity analysis
language:
- iso: eng
project:
- _id: '130'
grant_number: '418701707'
name: 'TRR 285: TRR 285'
- _id: '131'
name: 'TRR 285 - A: TRR 285 - Project Area A'
- _id: '135'
name: 'TRR 285 – A01: TRR 285 - Subproject A01'
publication: 'Journal of Advanced Joining Processes. '
publication_identifier:
unknown:
- https://doi.org/10.1016/j.jajp.2020.100038
publication_status: published
publisher: Elsevier
status: public
title: 'Numerical analysis of the robustness of clinching process considering the
pre-forming of the parts '
type: journal_article
user_id: '34782'
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: '13892'
abstract:
- lang: eng
text: Several ultrasonic approaches for material determination are formulated in
terms of an (nonlinear) inverse problem, e.g. immersion technique (Castaings et
al. (2000)) or plate-waveguide techniques (Marzani et al. (2012)). In this contribution
we focus on cylindrical waveguides for ultrasonic material determination and especially
on the sensitivity of recorded transmission signals to the material properties.
We utilize composite scaled sensitivities to determine the information content
that can be achieved by the setup to certain parameters and discuss the limitations
of the approach.
author:
- first_name: Fabian
full_name: Bause, Fabian
last_name: Bause
- first_name: Hauke
full_name: Gravenkamp, Hauke
last_name: Gravenkamp
- first_name: Jens
full_name: Rautenberg, Jens
last_name: Rautenberg
- first_name: Bernd
full_name: Henning, Bernd
id: '213'
last_name: Henning
citation:
ama: 'Bause F, Gravenkamp H, Rautenberg J, Henning B. Model based sensitivity analysis
in the determination of viscoelastic material properties using transmission measurements
through circular waveguides. In: ; 2015:204-207.'
apa: Bause, F., Gravenkamp, H., Rautenberg, J., & Henning, B. (2015). Model
based sensitivity analysis in the determination of viscoelastic material properties
using transmission measurements through circular waveguides (pp. 204–207).
bibtex: '@inproceedings{Bause_Gravenkamp_Rautenberg_Henning_2015, title={Model based
sensitivity analysis in the determination of viscoelastic material properties
using transmission measurements through circular waveguides}, author={Bause, Fabian
and Gravenkamp, Hauke and Rautenberg, Jens and Henning, Bernd}, year={2015}, pages={204–207}
}'
chicago: Bause, Fabian, Hauke Gravenkamp, Jens Rautenberg, and Bernd Henning. “Model
Based Sensitivity Analysis in the Determination of Viscoelastic Material Properties
Using Transmission Measurements through Circular Waveguides,” 204–7, 2015.
ieee: F. Bause, H. Gravenkamp, J. Rautenberg, and B. Henning, “Model based sensitivity
analysis in the determination of viscoelastic material properties using transmission
measurements through circular waveguides,” 2015, pp. 204–207.
mla: Bause, Fabian, et al. Model Based Sensitivity Analysis in the Determination
of Viscoelastic Material Properties Using Transmission Measurements through Circular
Waveguides. 2015, pp. 204–07.
short: 'F. Bause, H. Gravenkamp, J. Rautenberg, B. Henning, in: 2015, pp. 204–207.'
date_created: 2019-10-16T14:23:19Z
date_updated: 2022-01-06T06:51:46Z
department:
- _id: '49'
keyword:
- Sensitivity inverse problem ultrasonic material determination
language:
- iso: eng
page: 204-207
status: public
title: Model based sensitivity analysis in the determination of viscoelastic material
properties using transmission measurements through circular waveguides
type: conference
user_id: '15911'
year: '2015'
...
---
_id: '11816'
abstract:
- lang: eng
text: In this paper, we consider the Maximum Likelihood (ML) estimation of the parameters
of a GAUSSIAN in the presence of censored, i.e., clipped data. We show that the
resulting Expectation Maximization (EM) algorithm delivers virtually biasfree
and efficient estimates, and we discuss its convergence properties. We also discuss
optimal classification in the presence of censored data. Censored data are frequently
encountered in wireless LAN positioning systems based on the fingerprinting method
employing signal strength measurements, due to the limited sensitivity of the
portable devices. Experiments both on simulated and real-world data demonstrate
the effectiveness of the proposed algorithms.
author:
- first_name: Manh Kha
full_name: Hoang, Manh Kha
last_name: Hoang
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Hoang MK, Haeb-Umbach R. Parameter estimation and classification of censored
Gaussian data with application to WiFi indoor positioning. In: 38th International
Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013). ; 2013:3721-3725.
doi:10.1109/ICASSP.2013.6638353'
apa: Hoang, M. K., & Haeb-Umbach, R. (2013). Parameter estimation and classification
of censored Gaussian data with application to WiFi indoor positioning. In 38th
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013)
(pp. 3721–3725). https://doi.org/10.1109/ICASSP.2013.6638353
bibtex: '@inproceedings{Hoang_Haeb-Umbach_2013, title={Parameter estimation and
classification of censored Gaussian data with application to WiFi indoor positioning},
DOI={10.1109/ICASSP.2013.6638353},
booktitle={38th International Conference on Acoustics, Speech, and Signal Processing
(ICASSP 2013)}, author={Hoang, Manh Kha and Haeb-Umbach, Reinhold}, year={2013},
pages={3721–3725} }'
chicago: Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification
of Censored Gaussian Data with Application to WiFi Indoor Positioning.” In 38th
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013),
3721–25, 2013. https://doi.org/10.1109/ICASSP.2013.6638353.
ieee: M. K. Hoang and R. Haeb-Umbach, “Parameter estimation and classification of
censored Gaussian data with application to WiFi indoor positioning,” in 38th
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013),
2013, pp. 3721–3725.
mla: Hoang, Manh Kha, and Reinhold Haeb-Umbach. “Parameter Estimation and Classification
of Censored Gaussian Data with Application to WiFi Indoor Positioning.” 38th
International Conference on Acoustics, Speech, and Signal Processing (ICASSP 2013),
2013, pp. 3721–25, doi:10.1109/ICASSP.2013.6638353.
short: 'M.K. Hoang, R. Haeb-Umbach, in: 38th International Conference on Acoustics,
Speech, and Signal Processing (ICASSP 2013), 2013, pp. 3721–3725.'
date_created: 2019-07-12T05:28:48Z
date_updated: 2022-01-06T06:51:09Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6638353
keyword:
- Gaussian processes
- Global Positioning System
- convergence
- expectation-maximisation algorithm
- fingerprint identification
- indoor radio
- signal classification
- wireless LAN
- EM algorithm
- ML estimation
- WiFi indoor positioning
- censored Gaussian data classification
- clipped data
- convergence properties
- expectation maximization algorithm
- fingerprinting method
- maximum likelihood estimation
- optimal classification
- parameters estimation
- portable devices sensitivity
- signal strength measurements
- wireless LAN positioning systems
- Convergence
- IEEE 802.11 Standards
- Maximum likelihood estimation
- Parameter estimation
- Position measurement
- Training
- Indoor positioning
- censored data
- expectation maximization
- signal strength
- wireless LAN
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013.pdf
oa: '1'
page: 3721-3725
publication: 38th International Conference on Acoustics, Speech, and Signal Processing
(ICASSP 2013)
publication_identifier:
issn:
- 1520-6149
related_material:
link:
- description: Poster
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2013/HoHa2013_Poster.pdf
status: public
title: Parameter estimation and classification of censored Gaussian data with application
to WiFi indoor positioning
type: conference
user_id: '44006'
year: '2013'
...
---
_id: '9576'
abstract:
- lang: eng
text: 'In neurosurgery, delineation of tumor boundaries during resection of brain
tumors is of substantial relevance. During operation distinction between tumor
and healthy tissue rely on the abilities of the surgeon based on visual and tactile
differentiation. In this paper a high sensitivity actuator-sensor system using
a piezoelectric bimorph is presented. Frequency shift and transfer function of
the bimorphpsilas voltages are detected and evaluated. Sensorpsilas sensitivity
is evaluated using two frequency controls strategies: A phase-locked loop (PLL)
and a self-oscillating circuit. Results of measurements conducted on gel-phantoms
are presented and discussed.'
author:
- first_name: David Oliva
full_name: Uribe, David Oliva
last_name: Uribe
- first_name: Ralf
full_name: Stroop, Ralf
last_name: Stroop
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Jörg
full_name: Wallaschek, Jörg
last_name: Wallaschek
citation:
ama: 'Uribe DO, Stroop R, Hemsel T, Wallaschek J. Development of a biomedical tissue
differentiation system using piezoelectric actuators. In: Frequency Control
Symposium, 2008 IEEE International. ; 2008:91-94. doi:10.1109/FREQ.2008.4622963'
apa: Uribe, D. O., Stroop, R., Hemsel, T., & Wallaschek, J. (2008). Development
of a biomedical tissue differentiation system using piezoelectric actuators. In
Frequency Control Symposium, 2008 IEEE International (pp. 91–94). https://doi.org/10.1109/FREQ.2008.4622963
bibtex: '@inproceedings{Uribe_Stroop_Hemsel_Wallaschek_2008, title={Development
of a biomedical tissue differentiation system using piezoelectric actuators},
DOI={10.1109/FREQ.2008.4622963},
booktitle={Frequency Control Symposium, 2008 IEEE International}, author={Uribe,
David Oliva and Stroop, Ralf and Hemsel, Tobias and Wallaschek, Jörg}, year={2008},
pages={91–94} }'
chicago: Uribe, David Oliva, Ralf Stroop, Tobias Hemsel, and Jörg Wallaschek. “Development
of a Biomedical Tissue Differentiation System Using Piezoelectric Actuators.”
In Frequency Control Symposium, 2008 IEEE International, 91–94, 2008. https://doi.org/10.1109/FREQ.2008.4622963.
ieee: D. O. Uribe, R. Stroop, T. Hemsel, and J. Wallaschek, “Development of a biomedical
tissue differentiation system using piezoelectric actuators,” in Frequency
Control Symposium, 2008 IEEE International, 2008, pp. 91–94.
mla: Uribe, David Oliva, et al. “Development of a Biomedical Tissue Differentiation
System Using Piezoelectric Actuators.” Frequency Control Symposium, 2008 IEEE
International, 2008, pp. 91–94, doi:10.1109/FREQ.2008.4622963.
short: 'D.O. Uribe, R. Stroop, T. Hemsel, J. Wallaschek, in: Frequency Control Symposium,
2008 IEEE International, 2008, pp. 91–94.'
date_created: 2019-04-29T13:07:39Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '151'
doi: 10.1109/FREQ.2008.4622963
keyword:
- biomedical measurement
- brain
- cancer
- neurophysiology
- phantoms
- phase locked loops
- piezoelectric actuators
- surgery
- tactile sensors
- transfer functions
- tumours
- PLL
- biomedical tissue differentiation system
- brain tumor resection
- frequency control
- frequency shift
- gel-phantom
- high sensitivity actuator-sensor system
- neurosurgery
- phase-locked loop
- piezoelectric actuators
- piezoelectric bimorph
- self-oscillating circuit
- sensor sensitivity
- tactile differentiation
- tactile sensor system
- transfer function
- tumor boundary
- visual differentiation
- Biomedical measurements
- Circuits
- Frequency control
- Neoplasms
- Neurosurgery
- Phase locked loops
- Piezoelectric actuators
- Surges
- Transfer functions
- Voltage
language:
- iso: eng
page: 91-94
publication: Frequency Control Symposium, 2008 IEEE International
publication_identifier:
issn:
- 1075-6787
quality_controlled: '1'
status: public
title: Development of a biomedical tissue differentiation system using piezoelectric
actuators
type: conference
user_id: '55222'
year: '2008'
...
---
_id: '6093'
abstract:
- lang: eng
text: The U-shaped metacontrast function may result from the superimposition of
two monotonic components which reflect the effects of mechanisms similar to the
peripheral and central processes suggested for backward pattern masking by Turvey
(Psychol Rev 80:1-52, 1973). In an experiment using the disc-ring paradigm, it
was demonstrated that the decreasing and increasing branches of the metacontrast
function are differently affected by the exposure duration of the mask and a task-irrelevant
stimulus (distractor) appearing in the contralateral visual hemifield. The phenomenal
representation of masking is different for the two parts of the curve. It is suggested
that masking in the second part of the masking function, but not in the first,
is related to the control of visual attention. (PsycINFO Database Record (c) 2016
APA, all rights reserved)
author:
- first_name: Odmar
full_name: Neumann, Odmar
last_name: Neumann
- first_name: Ingrid
full_name: Scharlau, Ingrid
id: '451'
last_name: Scharlau
orcid: 0000-0003-2364-9489
citation:
ama: Neumann O, Scharlau I. Visual attention and the mechanism of metacontrast.
Psychological Research. 2007;71(6):626-633.
apa: Neumann, O., & Scharlau, I. (2007). Visual attention and the mechanism
of metacontrast. Psychological Research, 71(6), 626–633.
bibtex: '@article{Neumann_Scharlau_2007, title={Visual attention and the mechanism
of metacontrast.}, volume={71}, number={6}, journal={Psychological Research},
author={Neumann, Odmar and Scharlau, Ingrid}, year={2007}, pages={626–633} }'
chicago: 'Neumann, Odmar, and Ingrid Scharlau. “Visual Attention and the Mechanism
of Metacontrast.” Psychological Research 71, no. 6 (2007): 626–33.'
ieee: O. Neumann and I. Scharlau, “Visual attention and the mechanism of metacontrast.,”
Psychological Research, vol. 71, no. 6, pp. 626–633, 2007.
mla: Neumann, Odmar, and Ingrid Scharlau. “Visual Attention and the Mechanism of
Metacontrast.” Psychological Research, vol. 71, no. 6, 2007, pp. 626–33.
short: O. Neumann, I. Scharlau, Psychological Research 71 (2007) 626–633.
date_created: 2018-12-10T07:08:43Z
date_updated: 2022-06-07T00:20:12Z
department:
- _id: '424'
extern: '1'
intvolume: ' 71'
issue: '6'
keyword:
- visual attention
- metacontrast
- backward pattern masking
- monotonic components superimposition
- Attention
- Contrast Sensitivity
- Humans
- Judgment
- Perceptual Masking
- Visual Perception
- Metacognition
- Visual Contrast
- Visual Attention
- Visual Masking
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://kw.uni-paderborn.de/fileadmin/fakultaet/Institute/psychologie/Kognitive_Psychologie/Publikationen/NeumannScharlau2006VisualAttentionandMetscontrast.pdf
oa: '1'
page: 626 - 633
publication: Psychological Research
publication_identifier:
issn:
- 0340-0727
publication_status: published
status: public
title: Visual attention and the mechanism of metacontrast.
type: journal_article
user_id: '42165'
volume: 71
year: '2007'
...
---
_id: '8924'
abstract:
- lang: eng
text: In forced systems with cyclic symmetry localization can occur due toparameter
uncertainties. Often, Monte-Carlo simulations are used to findregions, where the
system response is sensitive to parameteruncertainties. These simulations require
a large computation time.Therefore, an approximate method to calculate the envelopes
of thefrequency response functions is developed in this paper. An example of anonlinear
system with cyclic symmetry is a bladed disk assembly withfriction dampers. Friction
dampers can be installed underneath the bladeplatforms of turbine blades. Due
to dry friction and the relative motionbetween blades and dampers, energy is dissipated,
which results in areduction of blade vibration amplitudes. By optimizing the mass
of thefriction dampers, the best damping effects are obtained, which lead toan
increase in the reliability of the turbine. In this paper, thecalculated response
of a mistuned bladed disk assembly with frictiondampers is discussed. An approximate
method is developed to calculatethe envelopes of the corresponding frequency response
function forstatistically varying eigenfrequencies of the blades. Regions wherelocalization
can occur with a high probability, are calculated by thismethod.
author:
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Karl
full_name: Popp, Karl
last_name: Popp
- first_name: Tomasz
full_name: Krzyzynski, Tomasz
last_name: Krzyzynski
citation:
ama: Sextro W, Popp K, Krzyzynski T. Localization in Nonlinear Mistuned Systems
with Cyclic Symmetry. Nonlinear Dynamics. 2001;25(1-3):207-220. doi:10.1023/A:1012915002568
apa: Sextro, W., Popp, K., & Krzyzynski, T. (2001). Localization in Nonlinear
Mistuned Systems with Cyclic Symmetry. Nonlinear Dynamics, 25(1–3),
207–220. https://doi.org/10.1023/A:1012915002568
bibtex: '@article{Sextro_Popp_Krzyzynski_2001, title={Localization in Nonlinear
Mistuned Systems with Cyclic Symmetry}, volume={25}, DOI={10.1023/A:1012915002568},
number={1–3}, journal={Nonlinear Dynamics}, publisher={Kluwer Academic Publishers},
author={Sextro, Walter and Popp, Karl and Krzyzynski, Tomasz}, year={2001}, pages={207–220}
}'
chicago: 'Sextro, Walter, Karl Popp, and Tomasz Krzyzynski. “Localization in Nonlinear
Mistuned Systems with Cyclic Symmetry.” Nonlinear Dynamics 25, no. 1–3
(2001): 207–20. https://doi.org/10.1023/A:1012915002568.'
ieee: W. Sextro, K. Popp, and T. Krzyzynski, “Localization in Nonlinear Mistuned
Systems with Cyclic Symmetry,” Nonlinear Dynamics, vol. 25, no. 1–3, pp.
207–220, 2001.
mla: Sextro, Walter, et al. “Localization in Nonlinear Mistuned Systems with Cyclic
Symmetry.” Nonlinear Dynamics, vol. 25, no. 1–3, Kluwer Academic Publishers,
2001, pp. 207–20, doi:10.1023/A:1012915002568.
short: W. Sextro, K. Popp, T. Krzyzynski, Nonlinear Dynamics 25 (2001) 207–220.
date_created: 2019-04-15T10:14:18Z
date_updated: 2022-01-06T07:04:05Z
department:
- _id: '151'
doi: 10.1023/A:1012915002568
intvolume: ' 25'
issue: 1-3
keyword:
- bladed disk assembly
- mistuning
- sensitivity
- localization
language:
- iso: eng
page: 207-220
publication: Nonlinear Dynamics
publication_identifier:
issn:
- 0924-090X
publisher: Kluwer Academic Publishers
status: public
title: Localization in Nonlinear Mistuned Systems with Cyclic Symmetry
type: journal_article
user_id: '55222'
volume: 25
year: '2001'
...