---
_id: '8842'
author:
- first_name: Ivan
full_name: Jovanovikj, Ivan
id: '39187'
last_name: Jovanovikj
orcid: https://orcid.org/0000-0002-1838-794X
citation:
ama: Jovanovikj I. Detection and Resolution of Data-Flow Differences in Business
Process Models.; 2014.
apa: Jovanovikj, I. (2014). Detection and Resolution of Data-Flow Differences
in Business Process Models.
bibtex: '@book{Jovanovikj_2014, title={Detection and Resolution of Data-Flow Differences
in Business Process Models}, author={Jovanovikj, Ivan}, year={2014} }'
chicago: Jovanovikj, Ivan. Detection and Resolution of Data-Flow Differences
in Business Process Models, 2014.
ieee: I. Jovanovikj, Detection and Resolution of Data-Flow Differences in Business
Process Models. 2014.
mla: Jovanovikj, Ivan. Detection and Resolution of Data-Flow Differences in Business
Process Models. 2014.
short: I. Jovanovikj, Detection and Resolution of Data-Flow Differences in Business
Process Models, 2014.
date_created: 2019-04-08T07:37:33Z
date_updated: 2022-01-06T07:04:03Z
department:
- _id: '66'
extern: '1'
language:
- iso: eng
status: public
supervisor:
- first_name: Christian
full_name: Gerth, Christian
last_name: Gerth
- first_name: Gregor
full_name: Engels, Gregor
id: '107'
last_name: Engels
title: Detection and Resolution of Data-Flow Differences in Business Process Models
type: mastersthesis
user_id: '39187'
year: '2014'
...
---
_id: '9583'
author:
- first_name: Marc
full_name: Beutner, Marc
id: '21118'
last_name: Beutner
- first_name: A
full_name: Zoyke, A
last_name: Zoyke
citation:
ama: 'Beutner M, Zoyke A. Individuelle Bildungsgangarbeit als Antwort auf Fachkräftebedarf
und Qualifikationsveränderungen. In: Brucherseifer M, Münk D, Walter M, eds. Arbeit
der Zukunft – Zukunft der Arbeit. Bonn; 2014:187-197.'
apa: Beutner, M., & Zoyke, A. (2014). Individuelle Bildungsgangarbeit als Antwort
auf Fachkräftebedarf und Qualifikationsveränderungen. In M. Brucherseifer, D.
Münk, & M. Walter (Eds.), Arbeit der Zukunft – Zukunft der Arbeit (pp.
187–197). Bonn.
bibtex: '@inbook{Beutner_Zoyke_2014, place={Bonn}, title={Individuelle Bildungsgangarbeit
als Antwort auf Fachkräftebedarf und Qualifikationsveränderungen}, booktitle={Arbeit
der Zukunft – Zukunft der Arbeit}, author={Beutner, Marc and Zoyke, A}, editor={Brucherseifer,
M and Münk, D and Walter, MEditors}, year={2014}, pages={187–197} }'
chicago: Beutner, Marc, and A Zoyke. “Individuelle Bildungsgangarbeit als Antwort
auf Fachkräftebedarf und Qualifikationsveränderungen.” In Arbeit der Zukunft
– Zukunft der Arbeit, edited by M Brucherseifer, D Münk, and M Walter, 187–97.
Bonn, 2014.
ieee: M. Beutner and A. Zoyke, “Individuelle Bildungsgangarbeit als Antwort auf
Fachkräftebedarf und Qualifikationsveränderungen,” in Arbeit der Zukunft –
Zukunft der Arbeit, M. Brucherseifer, D. Münk, and M. Walter, Eds. Bonn, 2014,
pp. 187–197.
mla: Beutner, Marc, and A. Zoyke. “Individuelle Bildungsgangarbeit als Antwort auf
Fachkräftebedarf und Qualifikationsveränderungen.” Arbeit der Zukunft – Zukunft
der Arbeit, edited by M Brucherseifer et al., 2014, pp. 187–97.
short: 'M. Beutner, A. Zoyke, in: M. Brucherseifer, D. Münk, M. Walter (Eds.), Arbeit
der Zukunft – Zukunft der Arbeit, Bonn, 2014, pp. 187–197.'
date_created: 2019-05-02T07:08:59Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '211'
editor:
- first_name: M
full_name: Brucherseifer, M
last_name: Brucherseifer
- first_name: D
full_name: Münk, D
last_name: Münk
- first_name: M
full_name: Walter, M
last_name: Walter
language:
- iso: ger
page: 187 - 197
place: Bonn
publication: Arbeit der Zukunft – Zukunft der Arbeit
status: public
title: Individuelle Bildungsgangarbeit als Antwort auf Fachkräftebedarf und Qualifikationsveränderungen
type: book_chapter
user_id: '66030'
year: '2014'
...
---
_id: '9584'
author:
- first_name: Marc
full_name: Beutner, Marc
id: '21118'
last_name: Beutner
citation:
ama: 'Beutner M. Bildungsgangarbeit in beruflichen Schulen – Praxisphasen und ihre
Auswirkungen in der Bildungsgangarbeit. In: Braukmann U, Dilger B, Kremer H-H,
eds. Wirtschaftspädagogische Handlungsfelder. Festschrift für Peter F. E. Sloane
zum 60. Geburtstag. Detmold; 2014:125-144.'
apa: Beutner, M. (2014). Bildungsgangarbeit in beruflichen Schulen – Praxisphasen
und ihre Auswirkungen in der Bildungsgangarbeit. In U. Braukmann, B. Dilger, &
H.-H. Kremer (Eds.), Wirtschaftspädagogische Handlungsfelder. Festschrift für
Peter F. E. Sloane zum 60. Geburtstag (pp. 125–144). Detmold.
bibtex: '@inbook{Beutner_2014, place={Detmold}, title={Bildungsgangarbeit in beruflichen
Schulen – Praxisphasen und ihre Auswirkungen in der Bildungsgangarbeit}, booktitle={Wirtschaftspädagogische
Handlungsfelder. Festschrift für Peter F. E. Sloane zum 60. Geburtstag}, author={Beutner,
Marc}, editor={Braukmann, U and Dilger, B and Kremer, H.-HEditors}, year={2014},
pages={125–144} }'
chicago: Beutner, Marc. “Bildungsgangarbeit in beruflichen Schulen – Praxisphasen
und ihre Auswirkungen in der Bildungsgangarbeit.” In Wirtschaftspädagogische
Handlungsfelder. Festschrift für Peter F. E. Sloane zum 60. Geburtstag, edited
by U Braukmann, B Dilger, and H.-H Kremer, 125–44. Detmold, 2014.
ieee: M. Beutner, “Bildungsgangarbeit in beruflichen Schulen – Praxisphasen und
ihre Auswirkungen in der Bildungsgangarbeit,” in Wirtschaftspädagogische Handlungsfelder.
Festschrift für Peter F. E. Sloane zum 60. Geburtstag, U. Braukmann, B. Dilger,
and H.-H. Kremer, Eds. Detmold, 2014, pp. 125–144.
mla: Beutner, Marc. “Bildungsgangarbeit in beruflichen Schulen – Praxisphasen und
ihre Auswirkungen in der Bildungsgangarbeit.” Wirtschaftspädagogische Handlungsfelder.
Festschrift für Peter F. E. Sloane zum 60. Geburtstag, edited by U Braukmann
et al., 2014, pp. 125–44.
short: 'M. Beutner, in: U. Braukmann, B. Dilger, H.-H. Kremer (Eds.), Wirtschaftspädagogische
Handlungsfelder. Festschrift für Peter F. E. Sloane zum 60. Geburtstag, Detmold,
2014, pp. 125–144.'
date_created: 2019-05-02T07:13:36Z
date_updated: 2022-01-06T07:04:16Z
department:
- _id: '211'
editor:
- first_name: U
full_name: Braukmann, U
last_name: Braukmann
- first_name: B
full_name: Dilger, B
last_name: Dilger
- first_name: H.-H
full_name: Kremer, H.-H
last_name: Kremer
language:
- iso: ger
page: 125 - 144
place: Detmold
publication: Wirtschaftspädagogische Handlungsfelder. Festschrift für Peter F. E.
Sloane zum 60. Geburtstag
status: public
title: Bildungsgangarbeit in beruflichen Schulen – Praxisphasen und ihre Auswirkungen
in der Bildungsgangarbeit
type: book_chapter
user_id: '66030'
year: '2014'
...
---
_id: '9627'
author:
- first_name: Merle
full_name: Tönnies, Merle
id: '555'
last_name: Tönnies
citation:
ama: 'Tönnies M. Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and Deconstructing
Terrorism. Arbeiten aus Anglistik und Amerikanistik. 2014;39:203-207.'
apa: 'Tönnies, M. (2014). Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and
Deconstructing Terrorism. Arbeiten Aus Anglistik Und Amerikanistik.'
bibtex: '@article{Tönnies_2014, title={Kamm, J. / Lenz, B. (Hg.): Representing Terrorism
and Deconstructing Terrorism}, volume={39}, journal={Arbeiten aus Anglistik und
Amerikanistik}, author={Tönnies, Merle}, year={2014}, pages={203–207} }'
chicago: 'Tönnies, Merle. “Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and
Deconstructing Terrorism.” Arbeiten Aus Anglistik Und Amerikanistik, 2014.'
ieee: 'M. Tönnies, “Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and Deconstructing
Terrorism,” Arbeiten aus Anglistik und Amerikanistik, vol. 39. pp. 203–207,
2014.'
mla: 'Tönnies, Merle. “Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and Deconstructing
Terrorism.” Arbeiten Aus Anglistik Und Amerikanistik, vol. 39, 2014, pp.
203–07.'
short: M. Tönnies, Arbeiten Aus Anglistik Und Amerikanistik 39 (2014) 203–207.
date_created: 2019-05-07T09:09:26Z
date_updated: 2022-01-06T07:04:17Z
department:
- _id: '36'
- _id: '1'
- _id: '380'
intvolume: ' 39'
language:
- iso: eng
page: 203-207
publication: Arbeiten aus Anglistik und Amerikanistik
publication_status: published
status: public
title: 'Kamm, J. / Lenz, B. (Hg.): Representing Terrorism and Deconstructing Terrorism'
type: review
user_id: '32277'
volume: 39
year: '2014'
...
---
_id: '9656'
author:
- first_name: Marc
full_name: Beutner, Marc
id: '21118'
last_name: Beutner
- first_name: M
full_name: Fortmann, M
last_name: Fortmann
- first_name: R
full_name: Pechuel, R
last_name: Pechuel
citation:
ama: Beutner M, Fortmann M, Pechuel R. E-Learning zur Sprach- und Berufsförderung
– Einblicke in AGnovel. Advanced Graphic novels in der Beruflichen Bildung. Kölner
Zeitschrift für Wirtschaft und Pädagogik. 2014;29(58):25-40.
apa: Beutner, M., Fortmann, M., & Pechuel, R. (2014). E-Learning zur Sprach-
und Berufsförderung – Einblicke in AGnovel. Advanced Graphic novels in der Beruflichen
Bildung. Kölner Zeitschrift für Wirtschaft und Pädagogik, 29(58),
25–40.
bibtex: '@article{Beutner_Fortmann_Pechuel_2014, title={E-Learning zur Sprach- und
Berufsförderung – Einblicke in AGnovel. Advanced Graphic novels in der Beruflichen
Bildung}, volume={29}, number={58}, journal={Kölner Zeitschrift für Wirtschaft
und Pädagogik}, author={Beutner, Marc and Fortmann, M and Pechuel, R}, year={2014},
pages={25–40} }'
chicago: 'Beutner, Marc, M Fortmann, and R Pechuel. “E-Learning zur Sprach- und
Berufsförderung – Einblicke in AGnovel. Advanced Graphic novels in der Beruflichen
Bildung.” Kölner Zeitschrift für Wirtschaft und Pädagogik 29, no. 58 (2014):
25–40.'
ieee: M. Beutner, M. Fortmann, and R. Pechuel, “E-Learning zur Sprach- und Berufsförderung
– Einblicke in AGnovel. Advanced Graphic novels in der Beruflichen Bildung,” Kölner
Zeitschrift für Wirtschaft und Pädagogik, vol. 29, no. 58, pp. 25–40, 2014.
mla: Beutner, Marc, et al. “E-Learning zur Sprach- und Berufsförderung – Einblicke
in AGnovel. Advanced Graphic novels in der Beruflichen Bildung.” Kölner Zeitschrift
für Wirtschaft und Pädagogik, vol. 29, no. 58, 2014, pp. 25–40.
short: M. Beutner, M. Fortmann, R. Pechuel, Kölner Zeitschrift für Wirtschaft und
Pädagogik 29 (2014) 25–40.
date_created: 2019-05-07T11:01:54Z
date_updated: 2022-01-06T07:04:17Z
department:
- _id: '211'
intvolume: ' 29'
issue: '58'
language:
- iso: ger
page: 25 - 40
publication: Kölner Zeitschrift für Wirtschaft und Pädagogik
status: public
title: E-Learning zur Sprach- und Berufsförderung – Einblicke in AGnovel. Advanced
Graphic novels in der Beruflichen Bildung
type: journal_article
user_id: '66030'
volume: 29
year: '2014'
...
---
_id: '9704'
author:
- first_name: Marc
full_name: Beutner, Marc
id: '21118'
last_name: Beutner
- first_name: L. M.
full_name: Fortmann, L. M.
last_name: Fortmann
citation:
ama: 'Beutner M, Fortmann LM. Entrepreneurship und Berufliche Bildung: UMW – Under
my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen aus nicht geschäftsbezogenen
Disziplinen bei der Unternehmensgründung. Kölner Zeitschrift für Wirtschaft
und Pädagogik. 2014;29(56):3-24.'
apa: 'Beutner, M., & Fortmann, L. M. (2014). Entrepreneurship und Berufliche
Bildung: UMW – Under my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen
aus nicht geschäftsbezogenen Disziplinen bei der Unternehmensgründung. Kölner
Zeitschrift für Wirtschaft und Pädagogik, 29(56), 3–24.'
bibtex: '@article{Beutner_Fortmann_2014, title={Entrepreneurship und Berufliche
Bildung: UMW – Under my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen
aus nicht geschäftsbezogenen Disziplinen bei der Unternehmensgründung}, volume={29},
number={56}, journal={Kölner Zeitschrift für Wirtschaft und Pädagogik}, author={Beutner,
Marc and Fortmann, L. M.}, year={2014}, pages={3–24} }'
chicago: 'Beutner, Marc, and L. M. Fortmann. “Entrepreneurship und Berufliche Bildung:
UMW – Under my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen
aus nicht geschäftsbezogenen Disziplinen bei der Unternehmensgründung.” Kölner
Zeitschrift für Wirtschaft und Pädagogik 29, no. 56 (2014): 3–24.'
ieee: 'M. Beutner and L. M. Fortmann, “Entrepreneurship und Berufliche Bildung:
UMW – Under my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen
aus nicht geschäftsbezogenen Disziplinen bei der Unternehmensgründung,” Kölner
Zeitschrift für Wirtschaft und Pädagogik, vol. 29, no. 56, pp. 3–24, 2014.'
mla: 'Beutner, Marc, and L. M. Fortmann. “Entrepreneurship und Berufliche Bildung:
UMW – Under my Wing – Ein Innovationsprojekt zur Unterstützung von Absolventen
aus nicht geschäftsbezogenen Disziplinen bei der Unternehmensgründung.” Kölner
Zeitschrift für Wirtschaft und Pädagogik, vol. 29, no. 56, 2014, pp. 3–24.'
short: M. Beutner, L.M. Fortmann, Kölner Zeitschrift für Wirtschaft und Pädagogik
29 (2014) 3–24.
date_created: 2019-05-08T08:57:40Z
date_updated: 2022-01-06T07:04:18Z
department:
- _id: '211'
intvolume: ' 29'
issue: '56'
language:
- iso: ger
page: 3 - 24
publication: Kölner Zeitschrift für Wirtschaft und Pädagogik
status: public
title: 'Entrepreneurship und Berufliche Bildung: UMW – Under my Wing – Ein Innovationsprojekt
zur Unterstützung von Absolventen aus nicht geschäftsbezogenen Disziplinen bei der
Unternehmensgründung'
type: journal_article
user_id: '66030'
volume: 29
year: '2014'
...
---
_id: '9722'
author:
- first_name: Christina
full_name: Flotmann, Christina
id: '8736'
last_name: Flotmann
citation:
ama: 'Flotmann C. Wiki-Wonderland? – Eine Qualitative Analyse zu Vor- und Nachteilen
von Wikis für Lehrende und Studierende. In: Kordts-Freudinger R, Urban D, Schaper
N, eds. Lehr- und Lernpraxis im Fokus – Forschungs- und Reflexionsbeiträge
aus der Universität Paderborn. ; 2014.'
apa: Flotmann, C. (2014). Wiki-Wonderland? – Eine Qualitative Analyse zu Vor- und
Nachteilen von Wikis für Lehrende und Studierende. In R. Kordts-Freudinger, D.
Urban, & N. Schaper (Eds.), Lehr- und Lernpraxis im Fokus – Forschungs-
und Reflexionsbeiträge aus der Universität Paderborn.
bibtex: '@inbook{Flotmann_2014, title={Wiki-Wonderland? – Eine Qualitative Analyse
zu Vor- und Nachteilen von Wikis für Lehrende und Studierende}, booktitle={Lehr-
und Lernpraxis im Fokus – Forschungs- und Reflexionsbeiträge aus der Universität
Paderborn}, author={Flotmann, Christina}, editor={Kordts-Freudinger, Robert and
Urban, Diana and Schaper, NicholasEditors}, year={2014} }'
chicago: Flotmann, Christina. “Wiki-Wonderland? – Eine Qualitative Analyse zu Vor-
und Nachteilen von Wikis für Lehrende und Studierende.” In Lehr- und Lernpraxis
im Fokus – Forschungs- und Reflexionsbeiträge aus der Universität Paderborn,
edited by Robert Kordts-Freudinger, Diana Urban, and Nicholas Schaper, 2014.
ieee: C. Flotmann, “Wiki-Wonderland? – Eine Qualitative Analyse zu Vor- und Nachteilen
von Wikis für Lehrende und Studierende,” in Lehr- und Lernpraxis im Fokus –
Forschungs- und Reflexionsbeiträge aus der Universität Paderborn, R. Kordts-Freudinger,
D. Urban, and N. Schaper, Eds. 2014.
mla: Flotmann, Christina. “Wiki-Wonderland? – Eine Qualitative Analyse zu Vor- und
Nachteilen von Wikis für Lehrende und Studierende.” Lehr- und Lernpraxis im
Fokus – Forschungs- und Reflexionsbeiträge aus der Universität Paderborn,
edited by Robert Kordts-Freudinger et al., 2014.
short: 'C. Flotmann, in: R. Kordts-Freudinger, D. Urban, N. Schaper (Eds.), Lehr-
und Lernpraxis im Fokus – Forschungs- und Reflexionsbeiträge aus der Universität
Paderborn, 2014.'
date_created: 2019-05-13T07:22:32Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '36'
- _id: '1'
- _id: '380'
editor:
- first_name: Robert
full_name: Kordts-Freudinger, Robert
last_name: Kordts-Freudinger
- first_name: Diana
full_name: Urban, Diana
last_name: Urban
- first_name: Nicholas
full_name: Schaper, Nicholas
last_name: Schaper
language:
- iso: ger
publication: Lehr- und Lernpraxis im Fokus – Forschungs- und Reflexionsbeiträge aus
der Universität Paderborn
publication_status: published
status: public
title: Wiki-Wonderland? – Eine Qualitative Analyse zu Vor- und Nachteilen von Wikis
für Lehrende und Studierende
type: book_chapter
user_id: '32277'
year: '2014'
...
---
_id: '9723'
author:
- first_name: Christina
full_name: Flotmann, Christina
id: '8736'
last_name: Flotmann
citation:
ama: 'Flotmann C. Political Rhetoric as a Structural and Ideological Instrument
in Star Wars and Harry Potter. In: Sedlmayr G, Waller N, eds. Politics in Fantasy
Media: Essays on Ideology and Gender in Fiction, Film, Television and Games.
Jefferson: McFarland; 2014:137-149.'
apa: 'Flotmann, C. (2014). Political Rhetoric as a Structural and Ideological Instrument
in Star Wars and Harry Potter. In G. Sedlmayr & N. Waller (Eds.), Politics
in Fantasy Media: Essays on Ideology and Gender in Fiction, Film, Television and
Games (pp. 137–149). Jefferson: McFarland.'
bibtex: '@inbook{Flotmann_2014, place={Jefferson}, title={Political Rhetoric as
a Structural and Ideological Instrument in Star Wars and Harry Potter}, booktitle={Politics
in Fantasy Media: Essays on Ideology and Gender in Fiction, Film, Television and
Games}, publisher={McFarland}, author={Flotmann, Christina}, editor={Sedlmayr,
Gerold and Waller, NicoleEditors}, year={2014}, pages={137–149} }'
chicago: 'Flotmann, Christina. “Political Rhetoric as a Structural and Ideological
Instrument in Star Wars and Harry Potter.” In Politics in Fantasy Media: Essays
on Ideology and Gender in Fiction, Film, Television and Games, edited by Gerold
Sedlmayr and Nicole Waller, 137–49. Jefferson: McFarland, 2014.'
ieee: 'C. Flotmann, “Political Rhetoric as a Structural and Ideological Instrument
in Star Wars and Harry Potter,” in Politics in Fantasy Media: Essays on Ideology
and Gender in Fiction, Film, Television and Games, G. Sedlmayr and N. Waller,
Eds. Jefferson: McFarland, 2014, pp. 137–149.'
mla: 'Flotmann, Christina. “Political Rhetoric as a Structural and Ideological Instrument
in Star Wars and Harry Potter.” Politics in Fantasy Media: Essays on Ideology
and Gender in Fiction, Film, Television and Games, edited by Gerold Sedlmayr
and Nicole Waller, McFarland, 2014, pp. 137–49.'
short: 'C. Flotmann, in: G. Sedlmayr, N. Waller (Eds.), Politics in Fantasy Media:
Essays on Ideology and Gender in Fiction, Film, Television and Games, McFarland,
Jefferson, 2014, pp. 137–149.'
date_created: 2019-05-13T07:24:44Z
date_updated: 2022-01-06T07:04:19Z
department:
- _id: '36'
- _id: '1'
- _id: '380'
editor:
- first_name: Gerold
full_name: Sedlmayr, Gerold
last_name: Sedlmayr
- first_name: Nicole
full_name: Waller, Nicole
last_name: Waller
language:
- iso: eng
page: 137-149
place: Jefferson
publication: 'Politics in Fantasy Media: Essays on Ideology and Gender in Fiction,
Film, Television and Games'
publication_status: published
publisher: McFarland
status: public
title: Political Rhetoric as a Structural and Ideological Instrument in Star Wars
and Harry Potter
type: book_chapter
user_id: '32277'
year: '2014'
...
---
_id: '9817'
author:
- first_name: Tilman-Mathies
full_name: Klar, Tilman-Mathies
id: '35771'
last_name: Klar
- first_name: Dieter
full_name: Engbring, Dieter
last_name: Engbring
citation:
ama: 'Klar T-M, Engbring D. Medienbildung mit Informatik-Anteilen!? . In: Forbrig
P, Magenheim J, eds. Gestalten und Meistern von Übergängen. 6. Tagung Hochschuldidatik
der Informatik. Freiburg; 2014:125-142.'
apa: Klar, T.-M., & Engbring, D. (2014). Medienbildung mit Informatik-Anteilen!?
. In P. Forbrig & J. Magenheim (Eds.), Gestalten und Meistern von Übergängen.
6. Tagung Hochschuldidatik der Informatik (pp. 125–142). Freiburg.
bibtex: '@inbook{Klar_Engbring_2014, place={Freiburg}, title={Medienbildung mit
Informatik-Anteilen!? }, booktitle={Gestalten und Meistern von Übergängen. 6.
Tagung Hochschuldidatik der Informatik}, author={Klar, Tilman-Mathies and Engbring,
Dieter}, editor={Forbrig, P. and Magenheim, J.Editors}, year={2014}, pages={125–142}
}'
chicago: Klar, Tilman-Mathies, and Dieter Engbring. “Medienbildung mit Informatik-Anteilen!?
.” In Gestalten und Meistern von Übergängen. 6. Tagung Hochschuldidatik der
Informatik, edited by P. Forbrig and J. Magenheim, 125–42. Freiburg, 2014.
ieee: T.-M. Klar and D. Engbring, “Medienbildung mit Informatik-Anteilen!? ,” in
Gestalten und Meistern von Übergängen. 6. Tagung Hochschuldidatik der Informatik,
P. Forbrig and J. Magenheim, Eds. Freiburg, 2014, pp. 125–142.
mla: Klar, Tilman-Mathies, and Dieter Engbring. “Medienbildung mit Informatik-Anteilen!?
.” Gestalten und Meistern von Übergängen. 6. Tagung Hochschuldidatik der Informatik,
edited by P. Forbrig and J. Magenheim, 2014, pp. 125–42.
short: 'T.-M. Klar, D. Engbring, in: P. Forbrig, J. Magenheim (Eds.), Gestalten
und Meistern von Übergängen. 6. Tagung Hochschuldidatik der Informatik, Freiburg,
2014, pp. 125–142.'
conference:
end_date: 2014-09-16
location: Universität Freiburg
name: 6. Tagung Hochschuldidatik der Informatik
start_date: 2014-09-15
date_created: 2019-05-15T09:08:41Z
date_updated: 2022-01-06T07:04:22Z
editor:
- first_name: P.
full_name: Forbrig, P.
last_name: Forbrig
- first_name: J.
full_name: Magenheim, J.
last_name: Magenheim
language:
- iso: ger
page: 125-142
place: Freiburg
publication: Gestalten und Meistern von Übergängen. 6. Tagung Hochschuldidatik der
Informatik
publication_status: published
status: public
title: 'Medienbildung mit Informatik-Anteilen!? '
type: book_chapter
user_id: '35771'
year: '2014'
...
---
_id: '9868'
abstract:
- lang: eng
text: In order to increase mechanical strength, heat dissipation and ampacity and
to decrease failure through fatigue fracture, wedge copper wire bonding is being
introduced as a standard interconnection method for mass production. To achieve
the same process stability when using copper wire instead of aluminum wire a profound
understanding of the bonding process is needed. Due to the higher hardness of
copper compared to aluminum wire it is more difficult to approach the surfaces
of wire and substrate to a level where van der Waals forces are able to arise
between atoms. Also, enough friction energy referred to the total contact area
has to be generated to activate the surfaces. Therefore, a friction model is used
to simulate the joining process. This model calculates the resulting energy of
partial areas in the contact surface and provides information about the adhesion
process of each area. The focus here is on the arising of micro joints in the
contact area depending on the location in the contact and time. To validate the
model, different touchdown forces are used to vary the initial contact areas of
wire and substrate. Additionally, a piezoelectric tri-axial force sensor is built
up to identify the known phases of pre-deforming, cleaning, adhering and diffusing
for the real bonding process to map with the model. Test substrates as DBC and
copper plate are used to show the different formations of a wedge bond connection
due to hardness and reaction propensity. The experiments were done by using 500
$\mu$m copper wire and a standard V-groove tool.
author:
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Jan
full_name: Neuhaus, Jan
last_name: Neuhaus
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Althoff S, Neuhaus J, Hemsel T, Sextro W. Improving the bond quality of copper
wire bonds using a friction model approach. In: Electronic Components and Technology
Conference (ECTC), 2014 IEEE 64th. ; 2014:1549-1555. doi:10.1109/ECTC.2014.6897500'
apa: Althoff, S., Neuhaus, J., Hemsel, T., & Sextro, W. (2014). Improving the
bond quality of copper wire bonds using a friction model approach. In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th (pp. 1549–1555).
https://doi.org/10.1109/ECTC.2014.6897500
bibtex: '@inproceedings{Althoff_Neuhaus_Hemsel_Sextro_2014, title={Improving the
bond quality of copper wire bonds using a friction model approach}, DOI={10.1109/ECTC.2014.6897500},
booktitle={Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th},
author={Althoff, Simon and Neuhaus, Jan and Hemsel, Tobias and Sextro, Walter},
year={2014}, pages={1549–1555} }'
chicago: Althoff, Simon, Jan Neuhaus, Tobias Hemsel, and Walter Sextro. “Improving
the Bond Quality of Copper Wire Bonds Using a Friction Model Approach.” In Electronic
Components and Technology Conference (ECTC), 2014 IEEE 64th, 1549–55, 2014.
https://doi.org/10.1109/ECTC.2014.6897500.
ieee: S. Althoff, J. Neuhaus, T. Hemsel, and W. Sextro, “Improving the bond quality
of copper wire bonds using a friction model approach,” in Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.
mla: Althoff, Simon, et al. “Improving the Bond Quality of Copper Wire Bonds Using
a Friction Model Approach.” Electronic Components and Technology Conference
(ECTC), 2014 IEEE 64th, 2014, pp. 1549–55, doi:10.1109/ECTC.2014.6897500.
short: 'S. Althoff, J. Neuhaus, T. Hemsel, W. Sextro, in: Electronic Components
and Technology Conference (ECTC), 2014 IEEE 64th, 2014, pp. 1549–1555.'
date_created: 2019-05-20T12:11:44Z
date_updated: 2019-09-16T10:57:58Z
department:
- _id: '151'
doi: 10.1109/ECTC.2014.6897500
keyword:
- adhesion
- circuit reliability
- deformation
- diffusion
- fatigue cracks
- friction
- interconnections
- lead bonding
- van der Waals forces
- Cu
- adhering process
- adhesion process
- ampacity improvement
- bond quality improvement
- cleaning process
- diffusing process
- fatigue fracture failure
- friction energy
- friction model
- heat dissipation
- mechanical strength
- piezoelectric triaxial force sensor
- predeforming process
- size 500 mum
- total contact area
- van der Waals forces
- wedge copper wire bonding
- Bonding
- Copper
- Finite element analysis
- Force
- Friction
- Substrates
- Wires
language:
- iso: eng
page: 1549-1555
publication: Electronic Components and Technology Conference (ECTC), 2014 IEEE 64th
quality_controlled: '1'
status: public
title: Improving the bond quality of copper wire bonds using a friction model approach
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9869'
abstract:
- lang: eng
text: Cavitation monitoring is desired to optimize the sonication for diverse sonochemical
processes and to detect changes or malfunctions during operation. In situ cavitation
measurements can be carried out by detection of the acoustic emissions of cavitation
bubbles by sensors in the liquid. However, in harsh environments sensors might
not be applicable. Thus, the impact of cavitation on the electrical signals of
a piezoelectric transducer has been analyzed as alternative method to measure
the threshold, strength and type of cavitation. The applicability has been tested
in three different setups to evaluate the general- izability of extracted indicators.
In all setups indicators for the cavitation thresholds could be derived from the
current signal. In two setups features showed two thresholds that may be linked
to the types of cavitation. However, only one feature derived from the current
signal in one particular setup correlated to the strength of cavitation. Cavitation
detection based on the current signal of the transducer is a useful method to
detect cavitation in harsh environments and without perturbing the sound field.
Once appli- cable indicators have been identified, they may easily be tracked
during the process. However, for more detailed studies about the cavitation activity
and its spatial distribution, measurements with in situ sensors are recommended.
author:
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Gianluca
full_name: Memoli, Gianluca
last_name: Memoli
- first_name: Mark
full_name: Hodnett, Mark
last_name: Hodnett
- first_name: Bajram
full_name: Zeqiri, Bajram
last_name: Zeqiri
citation:
ama: 'Bornmann P, Hemsel T, Sextro W, Memoli G, Hodnett M, Zeqiri B. Self-Sensing
Ultrasound Transducer for Cavitation Detection. In: 2014 IEEE International
Ultrasonics Symposium Proceedings. ; 2014:663-666. doi:10.1109/ULTSYM.2014.0163'
apa: Bornmann, P., Hemsel, T., Sextro, W., Memoli, G., Hodnett, M., & Zeqiri,
B. (2014). Self-Sensing Ultrasound Transducer for Cavitation Detection. In 2014
IEEE International Ultrasonics Symposium Proceedings (pp. 663–666). https://doi.org/10.1109/ULTSYM.2014.0163
bibtex: '@inproceedings{Bornmann_Hemsel_Sextro_Memoli_Hodnett_Zeqiri_2014, title={Self-Sensing
Ultrasound Transducer for Cavitation Detection}, DOI={10.1109/ULTSYM.2014.0163},
booktitle={2014 IEEE International Ultrasonics Symposium Proceedings}, author={Bornmann,
Peter and Hemsel, Tobias and Sextro, Walter and Memoli, Gianluca and Hodnett,
Mark and Zeqiri, Bajram}, year={2014}, pages={663–666} }'
chicago: Bornmann, Peter, Tobias Hemsel, Walter Sextro, Gianluca Memoli, Mark Hodnett,
and Bajram Zeqiri. “Self-Sensing Ultrasound Transducer for Cavitation Detection.”
In 2014 IEEE International Ultrasonics Symposium Proceedings, 663–66, 2014.
https://doi.org/10.1109/ULTSYM.2014.0163.
ieee: P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, and B. Zeqiri, “Self-Sensing
Ultrasound Transducer for Cavitation Detection,” in 2014 IEEE International
Ultrasonics Symposium Proceedings, 2014, pp. 663–666.
mla: Bornmann, Peter, et al. “Self-Sensing Ultrasound Transducer for Cavitation
Detection.” 2014 IEEE International Ultrasonics Symposium Proceedings,
2014, pp. 663–66, doi:10.1109/ULTSYM.2014.0163.
short: 'P. Bornmann, T. Hemsel, W. Sextro, G. Memoli, M. Hodnett, B. Zeqiri, in:
2014 IEEE International Ultrasonics Symposium Proceedings, 2014, pp. 663–666.'
date_created: 2019-05-20T12:13:02Z
date_updated: 2019-05-20T12:13:41Z
department:
- _id: '151'
doi: 10.1109/ULTSYM.2014.0163
language:
- iso: eng
page: 663-666
publication: 2014 IEEE International Ultrasonics Symposium Proceedings
publication_identifier:
isbn:
- '9781479970490'
status: public
title: Self-Sensing Ultrasound Transducer for Cavitation Detection
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9870'
abstract:
- lang: eng
text: Nowadays wire bonding is a widely-used technology for interconnecting chips
in the packaging industry. Thereby, it is known that the bond quality massively
depends upon the microstructure prevailing in the bond and consequently the materials
used as well as the bonding parameters. However the actually used materials such
as aluminum and gold are either characterized by comparibly poor conductivity
or high costs, respectively. Due to its outstanding properties copper is a more
attractive candidate. Still, a thorough investigation on the interrelationship
between the material combinations, the processing parameters and the resulting
microstructure for copper and aluminum wire bonding was not carried out yet. Depending
on the aforementioned factors the microstructural evolution can be completely
different during the bonding process. Therefore, this study focuses on the microstructural
evolution of heavy copper and heavy aluminum wires bonded on copper substrates.
The evolution of the wire microstructure as well as the wire-substrate-interface
was investigated by scanning electron microscope in combination with electron
backscatter diffraction and microhardness measurements. Various samples were extracted
at different points of the bonding process, namely the as-received condition,
after touchdown and after completed bonding. The results of the aluminum and copper
wires were compared to each other in both longitudinal and transversal direction.
It was found, that the two wire materials were completely different in the as-received
condition regarding the grain size, the grain morphology, the texture and the
microhardness. After touchdown the microstructure did not show significant changes
in both materials, yet a strain-hardening was observed in the copper wire resulting
from the touchdown force. When the bonding process was completed a different microstructure
could be observed in both the wire as well as the layer for the materials investigated.
Furthermore, a destinctive increase in the wire hardness could be found in case
of copper, which was not observed for the aluminum wire. The ramifications between
the two wire materials presented in this work will be discussed with the objective
of optimizing the quality of the bonds.
author:
- first_name: Florian
full_name: Eacock , Florian
last_name: 'Eacock '
- first_name: Mirko
full_name: Schaper, Mirko
last_name: Schaper
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Andreas
full_name: Unger, Andreas
last_name: Unger
- first_name: Paul
full_name: Eichwald, Paul
last_name: Eichwald
- first_name: Florian
full_name: Hengsbach, Florian
last_name: Hengsbach
- first_name: Carolin
full_name: Zinn, Carolin
last_name: Zinn
- first_name: ' Martin Joachim'
full_name: Holzweissig, Martin Joachim
last_name: Holzweissig
- first_name: Karsten
full_name: Guth, Karsten
last_name: Guth
citation:
ama: 'Eacock F, Schaper M, Althoff S, et al. Microstructural investigations of
aluminum and copper wire bonds. In: Proceedings of the 47th International Symposium
on Microelectronics. ; 2014. doi:10.4071/isom-THP32'
apa: Eacock , F., Schaper, M., Althoff, S., Unger, A., Eichwald, P., Hengsbach,
F., … Guth, K. (2014). Microstructural investigations of aluminum and copper wire
bonds. In Proceedings of the 47th International Symposium on Microelectronics.
https://doi.org/10.4071/isom-THP32
bibtex: '@inproceedings{Eacock _Schaper_Althoff_Unger_Eichwald_Hengsbach_Zinn_Holzweissig_Guth_2014,
title={Microstructural investigations of aluminum and copper wire bonds}, DOI={10.4071/isom-THP32}, booktitle={Proceedings
of the 47th International Symposium on Microelectronics}, author={Eacock , Florian
and Schaper, Mirko and Althoff, Simon and Unger, Andreas and Eichwald, Paul and
Hengsbach, Florian and Zinn, Carolin and Holzweissig, Martin Joachim and Guth,
Karsten}, year={2014} }'
chicago: Eacock , Florian, Mirko Schaper, Simon Althoff, Andreas Unger, Paul Eichwald,
Florian Hengsbach, Carolin Zinn, Martin Joachim Holzweissig, and Karsten Guth.
“Microstructural Investigations of Aluminum and Copper Wire Bonds.” In Proceedings
of the 47th International Symposium on Microelectronics, 2014. https://doi.org/10.4071/isom-THP32.
ieee: F. Eacock et al., “Microstructural investigations of aluminum and
copper wire bonds,” in Proceedings of the 47th International Symposium on Microelectronics,
2014.
mla: Eacock , Florian, et al. “Microstructural Investigations of Aluminum and Copper
Wire Bonds.” Proceedings of the 47th International Symposium on Microelectronics,
2014, doi:10.4071/isom-THP32.
short: 'F. Eacock , M. Schaper, S. Althoff, A. Unger, P. Eichwald, F. Hengsbach,
C. Zinn, Martin Joachim Holzweissig, K. Guth, in: Proceedings of the 47th International
Symposium on Microelectronics, 2014.'
date_created: 2019-05-20T12:14:11Z
date_updated: 2019-09-16T10:58:50Z
department:
- _id: '151'
doi: 10.4071/isom-THP32
keyword:
- Bonding
- Copper
- Microstructure evolution
language:
- iso: eng
publication: Proceedings of the 47th International Symposium on Microelectronics
quality_controlled: '1'
status: public
title: Microstructural investigations of aluminum and copper wire bonds
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9871'
abstract:
- lang: eng
text: 'Wire bonding is the most common technology for connecting electronic components.
Due to their efficiency bond interconnections made of copper wire are used for
example in the aerospace and medical technology as well as in the fields of renewable
energies. One of the main cost factors in the manufacturing process is the consumables
like bonding tools. The technological transition to copper as wire material causes
significant wear on the millimeter large effective contact area of the bonding
tool. This wear leads to a loss by a factor of 30 of the number of reliable interconnections
which can be produced by a single tool. To reduce setting-up time in the production
and minimizing costs, an enlarged bonding tool lifetime is desirable. Consequently
a better understanding of wear and recognition of wear pattern is required. Therefore,
the paper presents an analyzing method of the tool topography change of a heavy
wire bonding tool by using a confocal microscope. Furthermore, the paper discusses
the identification of the main wear indicators by the help of the named topography
change for different bond parameters, like ultrasonic power and tool geometry.
Reference topography has been carried out by choosing typical parameters of the
production line. To judge whether the quality requirement of the bond connections
made by a single tool cannot be fulfilled shear test of the source bond have been
carried out after a defined number of produced bond connections. Main steps of
analysis: (I)Topography of the tool surface is sampled after a defined number
of bonds by means of a confocal microscope to detect the wear progress.(II)The
recorded data is filtered using Matlab. So, measurement errors can be eliminated
and the topography can be overlaid more easy to identify differences between diverse
tools or differences in wear stages of the same tool.(III)The subsequent discretization
of the topography into sub volumes allows to (IV)describe the loss of volume depending
on the position in the groove. Thereby, intermediate status of wear of one tool
can be used to obtain a persistent description of the topography change over the
number of produced bonds by interpolating the confocal data. Afterwards the persistent
change of the groove flank has been analyzed for the named test series to identify
the main wear indicators and their effect on shear forces. All worn tools show
dominant areas for volume loss especially for plastic deformation and accordingly
abrasion. These wear mechanism can be referred to the change of main parts of
the groove geometry like the rounding of the front and back radius. The most volume
loss was identified in the upper part of the tool flanks or rather at the transition
from the groove flank to the front or back radius. Furthermore the observation
of the center of the groove flank shows just a little change in volume. All in
all, the identification of the wear indicators will be discussed with the objective
of increasing the tool lifetime by optimizing the tool geometry without losses
in bond quality and reliability.'
author:
- first_name: Paul
full_name: Eichwald, Paul
last_name: Eichwald
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Simon
full_name: Althof, Simon
last_name: Althof
- first_name: Florian
full_name: Eacock, Florian
last_name: Eacock
- first_name: Andreas
full_name: Unger, Andreas
last_name: Unger
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Karsten
full_name: Guth, Karsten
last_name: Guth
citation:
ama: 'Eichwald P, Sextro W, Althof S, et al. Analysis Method of Tool Topography
Change and Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding.
In: Proceedings of the 47th International Symposium on Microelectronics.
; 2014:856-861. doi:10.4071/isom-THP34'
apa: Eichwald, P., Sextro, W., Althof, S., Eacock, F., Unger, A., Meyer, T., &
Guth, K. (2014). Analysis Method of Tool Topography Change and Identification
of Wear Indicators for Heavy Copper Wire Wedge Bonding. In Proceedings of the
47th International Symposium on Microelectronics (pp. 856–861). https://doi.org/10.4071/isom-THP34
bibtex: '@inproceedings{Eichwald_Sextro_Althof_Eacock_Unger_Meyer_Guth_2014, title={Analysis
Method of Tool Topography Change and Identification of Wear Indicators for Heavy
Copper Wire Wedge Bonding}, DOI={10.4071/isom-THP34},
booktitle={Proceedings of the 47th International Symposium on Microelectronics},
author={Eichwald, Paul and Sextro, Walter and Althof, Simon and Eacock, Florian
and Unger, Andreas and Meyer, Tobias and Guth, Karsten}, year={2014}, pages={856–861}
}'
chicago: Eichwald, Paul, Walter Sextro, Simon Althof, Florian Eacock, Andreas Unger,
Tobias Meyer, and Karsten Guth. “Analysis Method of Tool Topography Change and
Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding.” In Proceedings
of the 47th International Symposium on Microelectronics, 856–61, 2014. https://doi.org/10.4071/isom-THP34.
ieee: P. Eichwald et al., “Analysis Method of Tool Topography Change and
Identification of Wear Indicators for Heavy Copper Wire Wedge Bonding,” in Proceedings
of the 47th International Symposium on Microelectronics, 2014, pp. 856–861.
mla: Eichwald, Paul, et al. “Analysis Method of Tool Topography Change and Identification
of Wear Indicators for Heavy Copper Wire Wedge Bonding.” Proceedings of the
47th International Symposium on Microelectronics, 2014, pp. 856–61, doi:10.4071/isom-THP34.
short: 'P. Eichwald, W. Sextro, S. Althof, F. Eacock, A. Unger, T. Meyer, K. Guth,
in: Proceedings of the 47th International Symposium on Microelectronics, 2014,
pp. 856–861.'
date_created: 2019-05-20T12:18:55Z
date_updated: 2020-05-07T05:33:45Z
department:
- _id: '151'
doi: 10.4071/isom-THP34
keyword:
- wedge/wedge bonding
- copper wire
- tool wear
language:
- iso: eng
page: 856-861
project:
- _id: '92'
grant_number: 02 PQ2210
name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: Proceedings of the 47th International Symposium on Microelectronics
status: public
title: Analysis Method of Tool Topography Change and Identification of Wear Indicators
for Heavy Copper Wire Wedge Bonding
type: conference
user_id: '210'
year: '2014'
...
---
_id: '9873'
abstract:
- lang: eng
text: Intelligent technical systems, which combine mechanical, electrical and software
engineering with methods from control engineering and advanced mathematics, go
far beyond the state of the art in mechatronics and open up fascinating perspectives.
Among these systems are so-called self-optimizing systems, which are able to adapt
their behavior autonomously and flexibly to changing operating conditions. The
Collaborative Research Center 614 "Self-optimizing concepts and structures in
mechanical engineering" pursued the long-term aim to enable others to develop
dependable self-optimizing systems. Assuring their dependability poses new challenges.
However, self-optimization also offers the possibility to adapt the system's behavior
to improve dependability during operation. The aim of this book is to provide
methods and techniques to master the challenges and to exploit the possibilities
given by self-optimization. The reader will be able to develop self-optimizing
systems that fulfill and surpass today’s dependability requirements easily. This
book is directed to researchers and practitioners alike. It gives a brief introduction
to the holistic development approach for self-optimizing mechatronic systems and
the steps required to assure a dependable product design starting with the very
early conceptual design phase. A guideline to select suitable methods for each
step and the methods themselves are included. Each method is individually introduced,
many examples and full references are given.
author:
- first_name: Jürgen
full_name: Gausemeier, Jürgen
last_name: Gausemeier
- first_name: Franz
full_name: Josef Rammig, Franz
last_name: Josef Rammig
- first_name: Wilhelm
full_name: Schäfer, Wilhelm
last_name: Schäfer
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Gausemeier J, Josef Rammig F, Schäfer W, Sextro W. Dependability of Self-Optimizing
Mechatronic Systems. Vol Lecture Notes in Mechanical Engineering. Springer
Berlin Heidelberg; 2014.
apa: Gausemeier, J., Josef Rammig, F., Schäfer, W., & Sextro, W. (2014). Dependability
of Self-Optimizing Mechatronic Systems (Vol. Lecture Notes in Mechanical Engineering).
Springer Berlin Heidelberg.
bibtex: '@book{Gausemeier_Josef Rammig_Schäfer_Sextro_2014, title={Dependability
of Self-Optimizing Mechatronic Systems}, volume={Lecture Notes in Mechanical Engineering},
publisher={Springer Berlin Heidelberg}, author={Gausemeier, Jürgen and Josef Rammig,
Franz and Schäfer, Wilhelm and Sextro, Walter}, year={2014} }'
chicago: Gausemeier, Jürgen, Franz Josef Rammig, Wilhelm Schäfer, and Walter Sextro.
Dependability of Self-Optimizing Mechatronic Systems. Vol. Lecture Notes
in Mechanical Engineering. Springer Berlin Heidelberg, 2014.
ieee: J. Gausemeier, F. Josef Rammig, W. Schäfer, and W. Sextro, Dependability
of Self-Optimizing Mechatronic Systems, vol. Lecture Notes in Mechanical Engineering.
Springer Berlin Heidelberg, 2014.
mla: Gausemeier, Jürgen, et al. Dependability of Self-Optimizing Mechatronic
Systems. Vol. Lecture Notes in Mechanical Engineering, Springer Berlin Heidelberg,
2014.
short: J. Gausemeier, F. Josef Rammig, W. Schäfer, W. Sextro, Dependability of Self-Optimizing
Mechatronic Systems, Springer Berlin Heidelberg, 2014.
date_created: 2019-05-20T12:57:54Z
date_updated: 2019-05-20T13:00:58Z
department:
- _id: '151'
language:
- iso: eng
publisher: Springer Berlin Heidelberg
status: public
title: Dependability of Self-Optimizing Mechatronic Systems
type: book
user_id: '55222'
volume: Lecture Notes in Mechanical Engineering
year: '2014'
...
---
_id: '9874'
author:
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
- first_name: Christoph
full_name: Sondermann-Wölke, Christoph
last_name: Sondermann-Wölke
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Hemsel T, Bornmann P, Morita T, Sondermann-Wölke C, Sextro W. Reliability analysis
of ultrasonic power transducers. Archive of Applied Mechanics. 2014:1-7.
doi:10.1007/s00419-014-0965-4
apa: Hemsel, T., Bornmann, P., Morita, T., Sondermann-Wölke, C., & Sextro, W.
(2014). Reliability analysis of ultrasonic power transducers. Archive of Applied
Mechanics, 1–7. https://doi.org/10.1007/s00419-014-0965-4
bibtex: '@article{Hemsel_Bornmann_Morita_Sondermann-Wölke_Sextro_2014, title={Reliability
analysis of ultrasonic power transducers}, DOI={10.1007/s00419-014-0965-4},
journal={Archive of Applied Mechanics}, publisher={Springer Berlin Heidelberg},
author={Hemsel, Tobias and Bornmann, Peter and Morita, Takeshi and Sondermann-Wölke,
Christoph and Sextro, Walter}, year={2014}, pages={1–7} }'
chicago: Hemsel, Tobias, Peter Bornmann, Takeshi Morita, Christoph Sondermann-Wölke,
and Walter Sextro. “Reliability Analysis of Ultrasonic Power Transducers.” Archive
of Applied Mechanics, 2014, 1–7. https://doi.org/10.1007/s00419-014-0965-4.
ieee: T. Hemsel, P. Bornmann, T. Morita, C. Sondermann-Wölke, and W. Sextro, “Reliability
analysis of ultrasonic power transducers,” Archive of Applied Mechanics,
pp. 1–7, 2014.
mla: Hemsel, Tobias, et al. “Reliability Analysis of Ultrasonic Power Transducers.”
Archive of Applied Mechanics, Springer Berlin Heidelberg, 2014, pp. 1–7,
doi:10.1007/s00419-014-0965-4.
short: T. Hemsel, P. Bornmann, T. Morita, C. Sondermann-Wölke, W. Sextro, Archive
of Applied Mechanics (2014) 1–7.
date_created: 2019-05-20T13:01:25Z
date_updated: 2019-09-16T10:57:23Z
department:
- _id: '151'
doi: 10.1007/s00419-014-0965-4
keyword:
- Reliability
- Ultrasonic power transducers
- FMEA
language:
- iso: eng
page: 1-7
publication: Archive of Applied Mechanics
publication_identifier:
issn:
- 0939-1533
publisher: Springer Berlin Heidelberg
quality_controlled: '1'
status: public
title: Reliability analysis of ultrasonic power transducers
type: journal_article
user_id: '55222'
year: '2014'
...
---
_id: '9876'
abstract:
- lang: eng
text: Piezoelectric inertia motors use the inertia of a body to drive it by means
of a friction contact in a series of small steps. It has been shown previously
in theoretical investigations that higher velocities and smoother movements can
be obtained if these steps do not contain phases of stiction (''stick-slip`` operation),
but use sliding friction only (''slip-slip`` operation). One very promising driving
option for such motors is the superposition of multiple sinusoidal signals or
harmonics. In this contribution, the theoretical results are validated experimentally.
In this context, a quick and reliable identification process for parameters describing
the friction contact is proposed. Additionally, the force generation potential
of inertia motors is investigated theoretically and experimentally. The experimental
results confirm the theoretical result that for a given maximum frequency, a signal
with a high fundamental frequency and consisting of two superposed sine waves
leads to the highest velocity and the smoothest motion, while the maximum motor
force is obtained with signals containing more harmonics. These results are of
fundamental importance for the further development of high-velocity piezoelectric
inertia motors.
author:
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Hunstig M, Hemsel T, Sextro W. High-velocity operation of piezoelectric inertia
motors: experimental validation. Archive of Applied Mechanics. 2014:1-9.
doi:10.1007/s00419-014-0940-0'
apa: 'Hunstig, M., Hemsel, T., & Sextro, W. (2014). High-velocity operation
of piezoelectric inertia motors: experimental validation. Archive of Applied
Mechanics, 1–9. https://doi.org/10.1007/s00419-014-0940-0'
bibtex: '@article{Hunstig_Hemsel_Sextro_2014, title={High-velocity operation of
piezoelectric inertia motors: experimental validation}, DOI={10.1007/s00419-014-0940-0},
journal={Archive of Applied Mechanics}, publisher={Springer Berlin Heidelberg},
author={Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}, year={2014},
pages={1–9} }'
chicago: 'Hunstig, Matthias, Tobias Hemsel, and Walter Sextro. “High-Velocity Operation
of Piezoelectric Inertia Motors: Experimental Validation.” Archive of Applied
Mechanics, 2014, 1–9. https://doi.org/10.1007/s00419-014-0940-0.'
ieee: 'M. Hunstig, T. Hemsel, and W. Sextro, “High-velocity operation of piezoelectric
inertia motors: experimental validation,” Archive of Applied Mechanics,
pp. 1–9, 2014.'
mla: 'Hunstig, Matthias, et al. “High-Velocity Operation of Piezoelectric Inertia
Motors: Experimental Validation.” Archive of Applied Mechanics, Springer
Berlin Heidelberg, 2014, pp. 1–9, doi:10.1007/s00419-014-0940-0.'
short: M. Hunstig, T. Hemsel, W. Sextro, Archive of Applied Mechanics (2014) 1–9.
date_created: 2019-05-20T13:08:08Z
date_updated: 2019-05-20T13:08:43Z
department:
- _id: '151'
doi: 10.1007/s00419-014-0940-0
keyword:
- Inertia motor
- High velocity
- Stick-slip motor
- Slip-slip operation
- Friction parameter identification
language:
- iso: eng
page: 1-9
publication: Archive of Applied Mechanics
publication_identifier:
issn:
- 0939-1533
publisher: Springer Berlin Heidelberg
status: public
title: 'High-velocity operation of piezoelectric inertia motors: experimental validation'
type: journal_article
user_id: '55222'
year: '2014'
...
---
_id: '9878'
abstract:
- lang: eng
text: (K,Na)NbO3 ceramics have attracted much attention as lead-free piezoelectric
materials with high piezoelectric properties. High-quality (K,Na)NbO3 ceramics
can be sintered using KNbO3 and NaNbO3 powders synthesized by a hydrothermal method.
In this study, to enhance the quality factor of the ceramics, high-power ultrasonic
irradiation was employed during the hydrothermal method, which led to a reduction
in the particle size of the resultant powders.
author:
- first_name: G.
full_name: Isobe, G.
last_name: Isobe
- first_name: Takafumi
full_name: Maeda, Takafumi
last_name: Maeda
- first_name: Peter
full_name: Bornmann, Peter
last_name: Bornmann
- first_name: Tobias
full_name: Hemsel, Tobias
id: '210'
last_name: Hemsel
- first_name: Takeshi
full_name: Morita, Takeshi
last_name: Morita
citation:
ama: Isobe G, Maeda T, Bornmann P, Hemsel T, Morita T. Synthesis of lead-free piezoelectric
powders by ultrasonic-assisted hydrothermal method and properties of sintered
(K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics, and Frequency Control,
IEEE Transactions on. 2014;61(2):225-230. doi:10.1109/TUFFC.2014.6722608
apa: Isobe, G., Maeda, T., Bornmann, P., Hemsel, T., & Morita, T. (2014). Synthesis
of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal method
and properties of sintered (K0.48Na0.52)NBO3 ceramics. Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On, 61(2), 225–230. https://doi.org/10.1109/TUFFC.2014.6722608
bibtex: '@article{Isobe_Maeda_Bornmann_Hemsel_Morita_2014, title={Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics}, volume={61}, DOI={10.1109/TUFFC.2014.6722608},
number={2}, journal={Ultrasonics, Ferroelectrics, and Frequency Control, IEEE
Transactions on}, author={Isobe, G. and Maeda, Takafumi and Bornmann, Peter and
Hemsel, Tobias and Morita, Takeshi}, year={2014}, pages={225–230} }'
chicago: 'Isobe, G., Takafumi Maeda, Peter Bornmann, Tobias Hemsel, and Takeshi
Morita. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted Hydrothermal
Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On 61, no. 2 (2014):
225–30. https://doi.org/10.1109/TUFFC.2014.6722608.'
ieee: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, and T. Morita, “Synthesis of lead-free
piezoelectric powders by ultrasonic-assisted hydrothermal method and properties
of sintered (K0.48Na0.52)NBO3 ceramics,” Ultrasonics, Ferroelectrics, and Frequency
Control, IEEE Transactions on, vol. 61, no. 2, pp. 225–230, 2014.
mla: Isobe, G., et al. “Synthesis of Lead-Free Piezoelectric Powders by Ultrasonic-Assisted
Hydrothermal Method and Properties of Sintered (K0.48Na0.52)NBO3 Ceramics.” Ultrasonics,
Ferroelectrics, and Frequency Control, IEEE Transactions On, vol. 61, no.
2, 2014, pp. 225–30, doi:10.1109/TUFFC.2014.6722608.
short: G. Isobe, T. Maeda, P. Bornmann, T. Hemsel, T. Morita, Ultrasonics, Ferroelectrics,
and Frequency Control, IEEE Transactions On 61 (2014) 225–230.
date_created: 2019-05-20T13:10:14Z
date_updated: 2019-09-16T10:53:17Z
department:
- _id: '151'
doi: 10.1109/TUFFC.2014.6722608
intvolume: ' 61'
issue: '2'
keyword:
- Q-factor
- ceramics
- crystal growth from solution
- particle size
- piezoelectric materials
- potassium compounds
- powders
- sintering
- sodium compounds
- ultrasonic effects
- (K0.48Na0.52)NbO3
- KNbO3 powders
- NaNbO3 powders
- high-power ultrasonic irradiation
- lead-free piezoelectric materials
- lead-free piezoelectric powders
- particle size reduction
- piezoelectric properties
- quality factor
- sintered (K0.48Na0.52)NbO3 ceramics
- sintering
- ultrasonic-assisted hydrothermal method
- Acoustics
- Ceramics
- Lead
- Piezoelectric materials
- Powders
- Radiation effects
- Transducers
language:
- iso: eng
page: 225-230
publication: Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions
on
publication_identifier:
issn:
- 0885-3010
quality_controlled: '1'
status: public
title: Synthesis of lead-free piezoelectric powders by ultrasonic-assisted hydrothermal
method and properties of sintered (K0.48Na0.52)NBO3 ceramics
type: journal_article
user_id: '55222'
volume: 61
year: '2014'
...
---
_id: '9879'
abstract:
- lang: eng
text: Application of prognostics and health management (PHM) in the field of Proton
Exchange Membrane (PEM) fuel cells is emerging as an important tool in increasing
the reliability and availability of these systems. Though a lot of work is currently
being conducted to develop PHM systems for fuel cells, various challenges have
been encountered including the self-healing effect after characterization as well
as accelerated degradation due to dynamic loading, all which make RUL predictions
a difficult task. In this study, a prognostic approach based on adaptive particle
filter algorithm is proposed. The novelty of the proposed method lies in the introduction
of a self-healing factor after each characterization and the adaption of the degradation
model parameters to fit to the changing degradation trend. An ensemble of five
different state models based on weighted mean is then developed. The results show
that the method is effective in estimating the remaining useful life of PEM fuel
cells, with majority of the predictions falling within 5\% error. The method was
employed in the IEEE 2014 PHM Data Challenge and led to our team emerging the
winner of the RUL category of the challenge.
author:
- first_name: 'James Kuria '
full_name: 'Kimotho, James Kuria '
last_name: Kimotho
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Kimotho JK, Meyer T, Sextro W. PEM fuel cell prognostics using particle filter
with model parameter adaptation. In: Prognostics and Health Management (PHM),
2014 IEEE Conference On. ; 2014:1-6. doi:10.1109/ICPHM.2014.7036406'
apa: Kimotho, J. K., Meyer, T., & Sextro, W. (2014). PEM fuel cell prognostics
using particle filter with model parameter adaptation. In Prognostics and Health
Management (PHM), 2014 IEEE Conference on (pp. 1–6). https://doi.org/10.1109/ICPHM.2014.7036406
bibtex: '@inproceedings{Kimotho_Meyer_Sextro_2014, title={PEM fuel cell prognostics
using particle filter with model parameter adaptation}, DOI={10.1109/ICPHM.2014.7036406},
booktitle={Prognostics and Health Management (PHM), 2014 IEEE Conference on},
author={Kimotho, James Kuria and Meyer, Tobias and Sextro, Walter}, year={2014},
pages={1–6} }'
chicago: Kimotho, James Kuria , Tobias Meyer, and Walter Sextro. “PEM Fuel Cell
Prognostics Using Particle Filter with Model Parameter Adaptation.” In Prognostics
and Health Management (PHM), 2014 IEEE Conference On, 1–6, 2014. https://doi.org/10.1109/ICPHM.2014.7036406.
ieee: J. K. Kimotho, T. Meyer, and W. Sextro, “PEM fuel cell prognostics using particle
filter with model parameter adaptation,” in Prognostics and Health Management
(PHM), 2014 IEEE Conference on, 2014, pp. 1–6.
mla: Kimotho, James Kuria, et al. “PEM Fuel Cell Prognostics Using Particle Filter
with Model Parameter Adaptation.” Prognostics and Health Management (PHM),
2014 IEEE Conference On, 2014, pp. 1–6, doi:10.1109/ICPHM.2014.7036406.
short: 'J.K. Kimotho, T. Meyer, W. Sextro, in: Prognostics and Health Management
(PHM), 2014 IEEE Conference On, 2014, pp. 1–6.'
date_created: 2019-05-20T13:11:02Z
date_updated: 2019-05-20T13:12:27Z
department:
- _id: '151'
doi: 10.1109/ICPHM.2014.7036406
keyword:
- ageing
- particle filtering (numerical methods)
- proton exchange membrane fuel cells
- remaining life assessment
- PEM fuel cell prognostics
- PHM
- RUL predictions
- accelerated degradation
- adaptive particle filter algorithm
- dynamic loading
- model parameter adaptation
- prognostics and health management
- proton exchange membrane fuel cells
- remaining useful life estimation
- self-healing effect
- Adaptation models
- Data models
- Degradation
- Estimation
- Fuel cells
- Mathematical model
- Prognostics and health management
language:
- iso: eng
page: 1-6
publication: Prognostics and Health Management (PHM), 2014 IEEE Conference on
status: public
title: PEM fuel cell prognostics using particle filter with model parameter adaptation
type: conference
user_id: '55222'
year: '2014'
...
---
_id: '9880'
abstract:
- lang: eng
text: With the paradigm shift towards prognostic and health management (PHM) of
machinery, there is need for reliable PHM methodologies with narrow error bounds
to allow maintenance engineers take decisive maintenance actions based on the
prognostic results. Prognostics is mainly concerned with the estimation of the
remaining useful life (RUL) or time to failure (TTF). The accuracy of PHM methods
is usually a function of the features extracted from the raw data obtained from
sensors. In cases where the extracted features do not display clear degradation
trends, for instance highly loaded bearings, the accuracy of the state of the
art PHM methods is significantly affected. The data which lacks clear degradation
trend is referred to as non-trending data. This study presents a method for extracting
degradation trends from non-trending condition monitoring data for RUL estimation.
The raw signals are first filtered using a discrete wavelet transform (DWT) denoising
filter to remove noise from the acquired signals. Time domain, frequency domain
and time-frequency domain features are then extracted from the filtered signals.
An autoregressive model is then applied to the extracted features to identify
the degradation trends. Features representing the maximum health information are
then selected based on a performance evaluation criteria using extreme learning
machine (ELM) algorithm. The selected features can then be used as inputs in a
prognostic algorithm. The feasibility of the method is demonstrated using experimental
bearing vibration data. The performance of the method is evaluated on the accuracy
of RUL estimation and the results show that the method can be used to accurately
estimate RUL with a maximum error of 10\%.
author:
- first_name: James Kuria
full_name: Kimotho, James Kuria
last_name: Kimotho
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Kimotho JK, Sextro W. An approach for feature extraction and selection from
non-trending data for machinery prognosis. In: Proceedings of the Second European
Conference of the Prognostics and Health Management Society 2014. Vol 5. ;
2014.'
apa: Kimotho, J. K., & Sextro, W. (2014). An approach for feature extraction
and selection from non-trending data for machinery prognosis. In Proceedings
of the Second European Conference of the Prognostics and Health Management Society
2014 (Vol. 5).
bibtex: '@inproceedings{Kimotho_Sextro_2014, title={An approach for feature extraction
and selection from non-trending data for machinery prognosis}, volume={5}, booktitle={Proceedings
of the Second European Conference of the Prognostics and Health Management Society
2014}, author={Kimotho, James Kuria and Sextro, Walter}, year={2014} }'
chicago: Kimotho, James Kuria, and Walter Sextro. “An Approach for Feature Extraction
and Selection from Non-Trending Data for Machinery Prognosis.” In Proceedings
of the Second European Conference of the Prognostics and Health Management Society
2014, Vol. 5, 2014.
ieee: J. K. Kimotho and W. Sextro, “An approach for feature extraction and selection
from non-trending data for machinery prognosis,” in Proceedings of the Second
European Conference of the Prognostics and Health Management Society 2014,
2014, vol. 5.
mla: Kimotho, James Kuria, and Walter Sextro. “An Approach for Feature Extraction
and Selection from Non-Trending Data for Machinery Prognosis.” Proceedings
of the Second European Conference of the Prognostics and Health Management Society
2014, vol. 5, 2014.
short: 'J.K. Kimotho, W. Sextro, in: Proceedings of the Second European Conference
of the Prognostics and Health Management Society 2014, 2014.'
date_created: 2019-05-20T13:13:00Z
date_updated: 2019-09-16T10:37:35Z
department:
- _id: '151'
intvolume: ' 5'
keyword:
- autoregressive model ELM feature extraction feature selection non-trending Remaining
useful Life
language:
- iso: eng
publication: Proceedings of the Second European Conference of the Prognostics and
Health Management Society 2014
quality_controlled: '1'
status: public
title: An approach for feature extraction and selection from non-trending data for
machinery prognosis
type: conference
user_id: '55222'
volume: 5
year: '2014'
...
---
_id: '9881'
abstract:
- lang: eng
text: The increasing demand for high reliability, safety and availability of technical
systems calls for innovative maintenance strategies. The use of prognostic health
management (PHM) approach where maintenance action is taken based on current and
future health state of a component or system is rapidly gaining popularity in
the maintenance industry. Multiclass support vector machines (MC-SVM) has been
identified as a promising algorithm in PHM applications due to its high classification
accuracy. However, it requires parameter tuning for each application, with the
objective of minimizing the classification error. This is a single objective optimization
problem which requires the use of optimization algorithms that are capable of
exhaustively searching for the global optimum parameters. This work proposes the
use of hybrid differential evolution (DE) and particle swarm optimization (PSO)
in optimally tuning the MC-SVM parameters. DE identifies the search limit of the
parameters while PSO finds the global optimum within the search limit. The feasibility
of the approach is verified using bearing run-to-failure data and the results
show that the proposed method significantly increases health state classification
accuracy.
author:
- first_name: James Kuria
full_name: Kimotho, James Kuria
last_name: Kimotho
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Kimotho JK, Sextro W. Optimal Parameter Tuning for Multiclass Support Vector
Machines in Machinery Health State Estimation. PAMM. 2014;14(1):815-816.
doi:10.1002/pamm.201410388
apa: Kimotho, J. K., & Sextro, W. (2014). Optimal Parameter Tuning for Multiclass
Support Vector Machines in Machinery Health State Estimation. PAMM, 14(1),
815–816. https://doi.org/10.1002/pamm.201410388
bibtex: '@article{Kimotho_Sextro_2014, title={Optimal Parameter Tuning for Multiclass
Support Vector Machines in Machinery Health State Estimation}, volume={14}, DOI={10.1002/pamm.201410388}, number={1},
journal={PAMM}, publisher={WILEY-VCH Verlag}, author={Kimotho, James Kuria and
Sextro, Walter}, year={2014}, pages={815–816} }'
chicago: 'Kimotho, James Kuria, and Walter Sextro. “Optimal Parameter Tuning for
Multiclass Support Vector Machines in Machinery Health State Estimation.” PAMM
14, no. 1 (2014): 815–16. https://doi.org/10.1002/pamm.201410388.'
ieee: J. K. Kimotho and W. Sextro, “Optimal Parameter Tuning for Multiclass Support
Vector Machines in Machinery Health State Estimation,” PAMM, vol. 14, no.
1, pp. 815–816, 2014.
mla: Kimotho, James Kuria, and Walter Sextro. “Optimal Parameter Tuning for Multiclass
Support Vector Machines in Machinery Health State Estimation.” PAMM, vol.
14, no. 1, WILEY-VCH Verlag, 2014, pp. 815–16, doi:10.1002/pamm.201410388.
short: J.K. Kimotho, W. Sextro, PAMM 14 (2014) 815–816.
date_created: 2019-05-20T13:14:17Z
date_updated: 2019-05-20T13:15:00Z
department:
- _id: '151'
doi: 10.1002/pamm.201410388
intvolume: ' 14'
issue: '1'
language:
- iso: eng
page: 815-816
publication: PAMM
publication_identifier:
issn:
- 1617-7061
publisher: WILEY-VCH Verlag
status: public
title: Optimal Parameter Tuning for Multiclass Support Vector Machines in Machinery
Health State Estimation
type: journal_article
user_id: '55222'
volume: 14
year: '2014'
...