---
_id: '5675'
abstract:
- lang: eng
text: When responding to natural disasters, professional relief units are often
supported by many volunteers which are not affiliated to humanitarian organizations.
The effective coordination of these volunteers is crucial to leverage their capabilities
and to avoid conflicts with professional relief units. In this paper, we empirically
identify key requirements that professional relief units pose on this coordination.
Based on these requirements, we suggest a decision model. We computationally solve
a real-world instance of the model and empirically validate the computed solution
in interviews with practitioners. Our results show that the suggested model allows
for solving volunteer coordination tasks of realistic size near-optimally within
short time, with the determined solution being well accepted by practitioners.
We also describe in this article how the suggested decision support model is integrated
in the volunteer coordination system which we develop in joint cooperation with
a disaster management authority and a software development company.
author:
- first_name: Gerhard
full_name: Rauchecker, Gerhard
last_name: Rauchecker
- first_name: Guido
full_name: Schryen, Guido
id: '72850'
last_name: Schryen
citation:
ama: 'Rauchecker G, Schryen G. Decision Support for the Optimal Coordination of
Spontaneous Volunteers in Disaster Relief. In: Proceedings of the 15th International
Conference on Information Systems for Crisis Response and Management. ; 2018.'
apa: Rauchecker, G., & Schryen, G. (2018). Decision Support for the Optimal
Coordination of Spontaneous Volunteers in Disaster Relief. In Proceedings of
the 15th International Conference on Information Systems for Crisis Response and
Management. Rochester, NY, USA.
bibtex: '@inproceedings{Rauchecker_Schryen_2018, title={Decision Support for the
Optimal Coordination of Spontaneous Volunteers in Disaster Relief}, booktitle={Proceedings
of the 15th International Conference on Information Systems for Crisis Response
and Management}, author={Rauchecker, Gerhard and Schryen, Guido}, year={2018}
}'
chicago: Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal
Coordination of Spontaneous Volunteers in Disaster Relief.” In Proceedings
of the 15th International Conference on Information Systems for Crisis Response
and Management, 2018.
ieee: G. Rauchecker and G. Schryen, “Decision Support for the Optimal Coordination
of Spontaneous Volunteers in Disaster Relief,” in Proceedings of the 15th International
Conference on Information Systems for Crisis Response and Management, Rochester,
NY, USA, 2018.
mla: Rauchecker, Gerhard, and Guido Schryen. “Decision Support for the Optimal Coordination
of Spontaneous Volunteers in Disaster Relief.” Proceedings of the 15th International
Conference on Information Systems for Crisis Response and Management, 2018.
short: 'G. Rauchecker, G. Schryen, in: Proceedings of the 15th International Conference
on Information Systems for Crisis Response and Management, 2018.'
conference:
location: Rochester, NY, USA
name: 15th International Conference on Information Systems for Crisis Response and
Management
date_created: 2018-11-14T15:35:54Z
date_updated: 2022-01-06T07:02:28Z
ddc:
- '000'
department:
- _id: '277'
extern: '1'
file:
- access_level: open_access
content_type: application/pdf
creator: hsiemes
date_created: 2018-12-07T11:25:06Z
date_updated: 2018-12-13T15:05:44Z
file_id: '6020'
file_name: 2018_ISCRAM_Conference_Proceedings - Publication Version.pdf
file_size: 488472
relation: main_file
file_date_updated: 2018-12-13T15:05:44Z
has_accepted_license: '1'
keyword:
- Coordination of spontaneous volunteers
- volunteer coordination system
- decision support
- scheduling optimization model
- linear programming
language:
- iso: eng
oa: '1'
publication: Proceedings of the 15th International Conference on Information Systems
for Crisis Response and Management
status: public
title: Decision Support for the Optimal Coordination of Spontaneous Volunteers in
Disaster Relief
type: conference
user_id: '61579'
year: '2018'
...
---
_id: '9899'
abstract:
- lang: eng
text: Bainite is a steel microstructure consisting of three phases, bainitic ferrite,
austenite and carbides. It forms in two different morphologies, upper and lower
bainite, where different diffusion mechanisms are dominant. The aim of this work
is to simulate both transformations within a unified model. To this end, we extend
an own previously published model for lower bainite with diffusion across the
phase interface. As a central idea we introduce weighted Helmholtz energy functions
and a weighted mobility tensor, respectively. The individual Helmholtz energy
functions and mobility terms are related to the different diffusion mechanisms
which are responsible for the formation of both morphologies. Two representative
examples illustrate the capability of the coupled phase field/diffusion model
and show the expected behaviour.
author:
- first_name: M.
full_name: Düsing, M.
last_name: Düsing
- first_name: R.
full_name: Mahnken, R.
last_name: Mahnken
citation:
ama: Düsing M, Mahnken R. „A coupled phase field/diffusion model for upper and lower
bainitic transformation”. International Journal of Solids and Structures.
2018;135:172-183.
apa: Düsing, M., & Mahnken, R. (2018). „A coupled phase field/diffusion model
for upper and lower bainitic transformation”. International Journal of Solids
and Structures, 135, 172–183.
bibtex: '@article{Düsing_Mahnken_2018, title={„A coupled phase field/diffusion model
for upper and lower bainitic transformation”}, volume={135}, journal={International
Journal of Solids and Structures}, publisher={Elsevier}, author={Düsing, M. and
Mahnken, R.}, year={2018}, pages={172–183} }'
chicago: 'Düsing, M., and R. Mahnken. “„A Coupled Phase Field/Diffusion Model for
Upper and Lower Bainitic Transformation”.” International Journal of Solids
and Structures 135 (2018): 172–83.'
ieee: M. Düsing and R. Mahnken, “„A coupled phase field/diffusion model for upper
and lower bainitic transformation”,” International Journal of Solids and Structures,
vol. 135, pp. 172–183, 2018.
mla: Düsing, M., and R. Mahnken. “„A Coupled Phase Field/Diffusion Model for Upper
and Lower Bainitic Transformation”.” International Journal of Solids and Structures,
vol. 135, Elsevier, 2018, pp. 172–83.
short: M. Düsing, R. Mahnken, International Journal of Solids and Structures 135
(2018) 172–183.
date_created: 2019-05-21T13:03:05Z
date_updated: 2019-05-21T13:12:27Z
department:
- _id: '154'
intvolume: ' 135'
keyword:
- Coupled phase field/diffusion model
- Bainite
- Multiphase field method
- Cahn–Hilliard diffusion
- Diffusion across the interface
- Lower bainitic transformation
- Upper bainitic transformation
- Thermodynamic framework
- Microforce balance
language:
- iso: eng
page: 172-183
publication: International Journal of Solids and Structures
publication_identifier:
issn:
- 0020-7683
publication_status: published
publisher: Elsevier
status: public
title: „A coupled phase field/diffusion model for upper and lower bainitic transformation”
type: journal_article
user_id: '78813'
volume: 135
year: '2018'
...
---
_id: '9999'
abstract:
- lang: eng
text: Ultrasonic wire bonding is an indispensable process in the industrial manufacturing
of semiconductor devices. Copper wire is increasingly replacing the well-established
aluminium wire because of its superior electrical, thermal and mechanical properties.
Copper wire processes differ significantly from aluminium processes and are more
sensitive to disturbances, which reduces the range of parameter values suitable
for a stable process. Disturbances can be compensated by an adaption of process
parameters, but finding suitable parameters manually is difficult and time-consuming.
This paper presents a physical model of the ultrasonic wire bonding process including
the friction contact between tool and wire. This model yields novel insights into
the process. A prototype of a multi-objective optimizing bonding machine (MOBM)
is presented. It uses multi-objective optimization, based on the complete process
model, to automatically select the best operating point as a compromise of concurrent
objectives.
author:
- first_name: Andreas
full_name: Unger, Andreas
last_name: Unger
- first_name: Matthias
full_name: Hunstig, Matthias
last_name: Hunstig
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Michael
full_name: Brökelmann, Michael
last_name: Brökelmann
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: 'Unger A, Hunstig M, Meyer T, Brökelmann M, Sextro W. Intelligent Production
of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities and
Challenges. In: In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics,
Pasadena, CA, 2018. Vol Vol. 2018, No. 1, pp. 000572-000577. ; 2018. doi:10.4071/2380-4505-2018.1.000572'
apa: Unger, A., Hunstig, M., Meyer, T., Brökelmann, M., & Sextro, W. (2018).
Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights,
Opportunities and Challenges. In In Proceedings of IMAPS 2018 – 51st Symposium
on Microelectronics, Pasadena, CA, 2018 (Vol. Vol. 2018, No. 1, pp. 000572-000577.).
https://doi.org/10.4071/2380-4505-2018.1.000572
bibtex: '@inproceedings{Unger_Hunstig_Meyer_Brökelmann_Sextro_2018, title={Intelligent
Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities
and Challenges}, volume={Vol. 2018, No. 1, pp. 000572-000577.}, DOI={10.4071/2380-4505-2018.1.000572},
booktitle={In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics,
Pasadena, CA, 2018}, author={Unger, Andreas and Hunstig, Matthias and Meyer, Tobias
and Brökelmann, Michael and Sextro, Walter}, year={2018} }'
chicago: Unger, Andreas, Matthias Hunstig, Tobias Meyer, Michael Brökelmann, and
Walter Sextro. “Intelligent Production of Wire Bonds Using Multi-Objective Optimization
– Insights, Opportunities and Challenges.” In In Proceedings of IMAPS 2018
– 51st Symposium on Microelectronics, Pasadena, CA, 2018, Vol. Vol. 2018,
No. 1, pp. 000572-000577., 2018. https://doi.org/10.4071/2380-4505-2018.1.000572.
ieee: A. Unger, M. Hunstig, T. Meyer, M. Brökelmann, and W. Sextro, “Intelligent
Production of Wire Bonds using Multi-Objective Optimization – Insights, Opportunities
and Challenges,” in In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics,
Pasadena, CA, 2018, 2018, vol. Vol. 2018, No. 1, pp. 000572-000577.
mla: Unger, Andreas, et al. “Intelligent Production of Wire Bonds Using Multi-Objective
Optimization – Insights, Opportunities and Challenges.” In Proceedings of IMAPS
2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018, vol. Vol. 2018,
No. 1, pp. 000572-000577., 2018, doi:10.4071/2380-4505-2018.1.000572.
short: 'A. Unger, M. Hunstig, T. Meyer, M. Brökelmann, W. Sextro, in: In Proceedings
of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena, CA, 2018, 2018.'
date_created: 2019-05-27T10:27:45Z
date_updated: 2020-05-07T05:33:56Z
department:
- _id: '151'
doi: 10.4071/2380-4505-2018.1.000572
keyword:
- wire bonding
- multi-objective optimization
- process model
- copper wire
- self-optimization
language:
- iso: eng
project:
- _id: '92'
grant_number: 02 PQ2210
name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: In Proceedings of IMAPS 2018 – 51st Symposium on Microelectronics, Pasadena,
CA, 2018
quality_controlled: '1'
status: public
title: Intelligent Production of Wire Bonds using Multi-Objective Optimization – Insights,
Opportunities and Challenges
type: conference
user_id: '210'
volume: Vol. 2018, No. 1, pp. 000572-000577.
year: '2018'
...
---
_id: '24395'
abstract:
- lang: eng
text: "In the field of lightweight design by composites, the V-Model forms the basis
of inter- and\r\ntransdisciplinary collaboration and research of 13 doctoral students
from different disciplines, i. e.\r\nengineering, sciences and social sciences.
The technological challenges of the research college itself\r\nand the V-Model
as an approach for addressing these challenges are introduced. Within the\r\ncooperation
of the young researchers, a technology demonstrator was produced. On the one hand
this\r\ncan be seen as demonstrator for the different technologies which are addressed
by individual research\r\nand on the other hand for the interdisciplinary collaboration
itself. Exemplary, this technology\r\ndemonstrator is presented as one result
of the research group and the challenges of the\r\ninterdisciplinary collaboration
while producing it are pointed out."
author:
- first_name: Borkowski
full_name: Weiß, Borkowski
last_name: Weiß
- first_name: Horwath
full_name: Ilona, Horwath
last_name: Ilona
- first_name: Anna lena
full_name: Berscheid, Anna lena
last_name: Berscheid
- first_name: Silvia Dohmeier
full_name: Fischer, Silvia Dohmeier
last_name: Fischer
- first_name: Thomas
full_name: Tröster, Thomas
last_name: Tröster
citation:
ama: 'Weiß B, Ilona H, Berscheid A lena, Fischer SD, Tröster T. NEW APPROACHES IN
LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH
OF INTER- AND TRANSDISCIPLINARY RESEARCH. In: ; 2018. doi:Weiß-Borkowski, N.; Horwath,
I.; Berscheid, A.-L.; Tröster, T. (2018)'
apa: 'Weiß, B., Ilona, H., Berscheid, A. lena, Fischer, S. D., & Tröster, T.
(2018). NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN
BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH. Proceedings
of INTED2018 Conference, Valencia, Spain. https://doi.org/Weiß-Borkowski,
N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)'
bibtex: '@inproceedings{Weiß_Ilona_Berscheid_Fischer_Tröster_2018, title={NEW APPROACHES
IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH
OF INTER- AND TRANSDISCIPLINARY RESEARCH}, DOI={Weiß-Borkowski, N.; Horwath,
I.; Berscheid, A.-L.; Tröster, T. (2018)}, author={Weiß, Borkowski and Ilona,
Horwath and Berscheid, Anna lena and Fischer, Silvia Dohmeier and Tröster, Thomas},
year={2018} }'
chicago: 'Weiß, Borkowski, Horwath Ilona, Anna lena Berscheid, Silvia Dohmeier Fischer,
and Thomas Tröster. “NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT
DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH,”
2018. https://doi.org/Weiß-Borkowski, N.; Horwath, I.; Berscheid,
A.-L.; Tröster, T. (2018).'
ieee: 'B. Weiß, H. Ilona, A. lena Berscheid, S. D. Fischer, and T. Tröster, “NEW
APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES
AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH,” presented at the Proceedings
of INTED2018 Conference, Valencia, Spain, 2018, doi: Weiß-Borkowski, N.; Horwath,
I.; Berscheid, A.-L.; Tröster, T. (2018).'
mla: 'Weiß, Borkowski, et al. NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF
LIGHTWEIGHT DESIGN BY COMPOSITES AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY
RESEARCH. 2018, doi:Weiß-Borkowski, N.; Horwath, I.; Berscheid,
A.-L.; Tröster, T. (2018).'
short: 'B. Weiß, H. Ilona, A. lena Berscheid, S.D. Fischer, T. Tröster, in: 2018.'
conference:
end_date: 2018-03-07
location: Valencia, Spain
name: Proceedings of INTED2018 Conference
start_date: 2018-03-05
date_created: 2021-09-14T14:43:12Z
date_updated: 2022-04-20T09:15:12Z
ddc:
- '620'
department:
- _id: '603'
doi: Weiß-Borkowski, N.; Horwath, I.; Berscheid, A.-L.; Tröster, T. (2018)
file:
- access_level: closed
content_type: application/pdf
creator: innem
date_created: 2021-09-14T21:34:56Z
date_updated: 2021-09-14T21:34:56Z
file_id: '24470'
file_name: Weiss_etal_2018.pdf
file_size: 517765
relation: main_file
success: 1
file_date_updated: 2021-09-14T21:34:56Z
has_accepted_license: '1'
keyword:
- Lightweight Design
- Composites
- Interdisciplinarity
- Transdisciplinarity
- V-Model.
language:
- iso: eng
quality_controlled: '1'
status: public
title: 'NEW APPROACHES IN LIGHTWEIGHT DESIGN: V-MODEL OF LIGHTWEIGHT DESIGN BY COMPOSITES
AS AN APPROACH OF INTER- AND TRANSDISCIPLINARY RESEARCH'
type: conference
user_id: '83744'
year: '2018'
...
---
_id: '34498'
abstract:
- lang: eng
text: "Ample empirical research from regular school settings documents reciprocal
effects between academic performance and academic self-concept of ability (ASC),
supporting what is known as a reciprocal effects model (REM). The present article
investigates a REM in the domain of reading performance in a sample of elementary
students with special educational needs in learning (SEN-L) who received special
educational support in exclusive versus inclusive settings (N = 446). In exclusive
settings, SEN-L students attend special schools and are completely separated from
regular students. By contrast, SEN-L students in inclusive settings attend regular
schools and are educated in classes with regular students. In both settings, SEN-L
students are not graded and taught based on individual learning goals, which may
affect reciprocal effects between ASC and reading performance. In addition, given
that special education for SEN-L students relies heavily on individual reference
standards to evaluate performance, we tested individual performance growth of
SEN-L students as a predictor of ASC. Analyses of a longitudinal dataset across
3rd and 4th grade revealed some cross-lagged effects and an effect of performance
growth on ASC in exclusive settings in particular. The discussion focuses on the
role of individualized instruction, grades, peer groups, and individual versus
social reference standards for reciprocal effects between ASC and performance
as well as practical implications.\r\n"
author:
- first_name: Julia
full_name: Gorges, Julia
last_name: Gorges
- first_name: Phillip
full_name: Neumann, Phillip
id: '95559'
last_name: Neumann
- first_name: Elke
full_name: Wild, Elke
last_name: Wild
- first_name: Daniela
full_name: Stranghöner, Daniela
last_name: Stranghöner
- first_name: Birgit
full_name: Lütje-Klose, Birgit
last_name: Lütje-Klose
citation:
ama: 'Gorges J, Neumann P, Wild E, Stranghöner D, Lütje-Klose B. Reciprocal effects
between self-concept of ability and performance: A longitudinal study of children
with learning disabilities in inclusive versus exclusive elementary education.
Learning and Individual Differences. 2018;61:11-20. doi:10.1016/j.lindif.2017.11.005'
apa: 'Gorges, J., Neumann, P., Wild, E., Stranghöner, D., & Lütje-Klose, B.
(2018). Reciprocal effects between self-concept of ability and performance: A
longitudinal study of children with learning disabilities in inclusive versus
exclusive elementary education. Learning and Individual Differences, 61,
11–20. https://doi.org/10.1016/j.lindif.2017.11.005'
bibtex: '@article{Gorges_Neumann_Wild_Stranghöner_Lütje-Klose_2018, title={Reciprocal
effects between self-concept of ability and performance: A longitudinal study
of children with learning disabilities in inclusive versus exclusive elementary
education}, volume={61}, DOI={10.1016/j.lindif.2017.11.005},
journal={Learning and Individual Differences}, publisher={Elsevier BV}, author={Gorges,
Julia and Neumann, Phillip and Wild, Elke and Stranghöner, Daniela and Lütje-Klose,
Birgit}, year={2018}, pages={11–20} }'
chicago: 'Gorges, Julia, Phillip Neumann, Elke Wild, Daniela Stranghöner, and Birgit
Lütje-Klose. “Reciprocal Effects between Self-Concept of Ability and Performance:
A Longitudinal Study of Children with Learning Disabilities in Inclusive versus
Exclusive Elementary Education.” Learning and Individual Differences 61
(2018): 11–20. https://doi.org/10.1016/j.lindif.2017.11.005.'
ieee: 'J. Gorges, P. Neumann, E. Wild, D. Stranghöner, and B. Lütje-Klose, “Reciprocal
effects between self-concept of ability and performance: A longitudinal study
of children with learning disabilities in inclusive versus exclusive elementary
education,” Learning and Individual Differences, vol. 61, pp. 11–20, 2018,
doi: 10.1016/j.lindif.2017.11.005.'
mla: 'Gorges, Julia, et al. “Reciprocal Effects between Self-Concept of Ability
and Performance: A Longitudinal Study of Children with Learning Disabilities in
Inclusive versus Exclusive Elementary Education.” Learning and Individual Differences,
vol. 61, Elsevier BV, 2018, pp. 11–20, doi:10.1016/j.lindif.2017.11.005.'
short: J. Gorges, P. Neumann, E. Wild, D. Stranghöner, B. Lütje-Klose, Learning
and Individual Differences 61 (2018) 11–20.
date_created: 2022-12-17T13:20:47Z
date_updated: 2023-01-10T19:42:56Z
department:
- _id: '479'
doi: 10.1016/j.lindif.2017.11.005
extern: '1'
intvolume: ' 61'
keyword:
- BiLieF
- Special educational needs
- Learning disability
- Academic selfconcept of ability
- Reciprocal effects model
- Inclusive education
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://www.sciencedirect.com/science/article/pii/S1041608017302030
oa: '1'
page: 11-20
publication: Learning and Individual Differences
publication_identifier:
issn:
- 1041-6080
publication_status: published
publisher: Elsevier BV
status: public
title: 'Reciprocal effects between self-concept of ability and performance: A longitudinal
study of children with learning disabilities in inclusive versus exclusive elementary
education'
type: journal_article
user_id: '95559'
volume: 61
year: '2018'
...
---
_id: '9976'
abstract:
- lang: eng
text: State-of-the-art mechatronic systems offer inherent intelligence that enables
them to autonomously adapt their behavior to current environmental conditions
and to their own system state. This autonomous behavior adaptation is made possible
by software in combination with complex sensor and actuator systems and by sophisticated
information processing, all of which make these systems increasingly complex.
This increasing complexity makes the design process a challenging task and brings
new complex possibilities for operation and maintenance. However, with the risk
of increased system complexity also comes the chance to adapt system behavior
based on current reliability, which in turn increases reliability. The development
of such an adaption strategy requires appropriate methods to evaluate reliability
based on currently selected system behavior. A common approach to implement such
adaptivity is to base system behavior on different working points that are obtained
using multiobjective optimization. During operation, selection among these allows
a changed operating strategy. To allow for multiobjective optimization, an accurate
system model including system reliability is required. This model is repeatedly
evaluated by the optimization algorithm. At present, modeling of system reliability
and synchronization of the models of behavior and reliability is a laborious manual
task and thus very error-prone. Since system behavior is crucial for system reliability,
an integrated model is introduced that integrates system behavior and system reliability.
The proposed approach is used to formulate reliability-related objective functions
for a clutch test rig that are used to compute feasible working points using multiobjective
optimization.
author:
- first_name: Thorben
full_name: Kaul, Thorben
id: '14802'
last_name: Kaul
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
citation:
ama: Kaul T, Meyer T, Sextro W. Formulation of reliability-related objective functions
for design of intelligent mechatronic systems. SAGE Journals. 2017;Vol.
231(4):390-399. doi:10.1177/1748006X17709376
apa: Kaul, T., Meyer, T., & Sextro, W. (2017). Formulation of reliability-related
objective functions for design of intelligent mechatronic systems. SAGE Journals,
Vol. 231(4), 390–399. https://doi.org/10.1177/1748006X17709376
bibtex: '@article{Kaul_Meyer_Sextro_2017, title={Formulation of reliability-related
objective functions for design of intelligent mechatronic systems}, volume={Vol.
231(4)}, DOI={10.1177/1748006X17709376},
journal={SAGE Journals}, author={Kaul, Thorben and Meyer, Tobias and Sextro, Walter},
year={2017}, pages={390–399} }'
chicago: 'Kaul, Thorben, Tobias Meyer, and Walter Sextro. “Formulation of Reliability-Related
Objective Functions for Design of Intelligent Mechatronic Systems.” SAGE Journals
Vol. 231(4) (2017): 390–99. https://doi.org/10.1177/1748006X17709376.'
ieee: T. Kaul, T. Meyer, and W. Sextro, “Formulation of reliability-related objective
functions for design of intelligent mechatronic systems,” SAGE Journals,
vol. Vol. 231(4), pp. 390–399, 2017.
mla: Kaul, Thorben, et al. “Formulation of Reliability-Related Objective Functions
for Design of Intelligent Mechatronic Systems.” SAGE Journals, vol. Vol.
231(4), 2017, pp. 390–99, doi:10.1177/1748006X17709376.
short: T. Kaul, T. Meyer, W. Sextro, SAGE Journals Vol. 231(4) (2017) 390–399.
date_created: 2019-05-27T09:37:46Z
date_updated: 2019-09-16T10:20:49Z
department:
- _id: '151'
doi: 10.1177/1748006X17709376
keyword:
- Integrated model
- reliability
- system behavior
- Bayesian network
- multiobjective optimization
language:
- iso: eng
page: 390 - 399
publication: SAGE Journals
quality_controlled: '1'
status: public
title: Formulation of reliability-related objective functions for design of intelligent
mechatronic systems
type: journal_article
user_id: '55222'
volume: Vol. 231(4)
year: '2017'
...
---
_id: '4421'
abstract:
- lang: eng
text: In Switzerland, every student graduating from grammar school can begin to
study at a university. This leads to high dropout rates. Although students’ motivation
is considered a strong predictor of performance, the development of motivation
during students’ transition from high school to university has rarely been investigated.
Additionally, little is known about the relation of motivational aspects with
other influences on study performance. The present longitudinal study addresses
this research gap and examines the development of economics and management students’
study motivation. It encompasses four waves of data collected throughout the first
year, using quantitative online surveys. In total, the sample consists of 820
students. Data is analysed using latent change modelling. Results indicate that
students start at a higher level of intrinsic motivation compared to extrinsic
motivation. The variability of the starting value of the two constructs is also
differing. The analysis also shows a gradual decline in students’ motivation.
Above all, the transition from secondary to higher education seems to be a driver
for this decline.
author:
- first_name: Taiga
full_name: Brahm, Taiga
last_name: Brahm
- first_name: Tobias
full_name: Jenert, Tobias
last_name: Jenert
- first_name: Dietrich
full_name: Wagner, Dietrich
last_name: Wagner
citation:
ama: 'Brahm T, Jenert T, Wagner D. The crucial first year: a longitudinal study
of students’ motivational development at a Swiss Business School. Higher Education.
2016;73(3):459-478. doi:10.1007/s10734-016-0095-8'
apa: 'Brahm, T., Jenert, T., & Wagner, D. (2016). The crucial first year: a
longitudinal study of students’ motivational development at a Swiss Business School.
Higher Education, 73(3), 459–478. https://doi.org/10.1007/s10734-016-0095-8'
bibtex: '@article{Brahm_Jenert_Wagner_2016, title={The crucial first year: a longitudinal
study of students’ motivational development at a Swiss Business School}, volume={73},
DOI={10.1007/s10734-016-0095-8},
number={3}, journal={Higher Education}, publisher={Springer Nature}, author={Brahm,
Taiga and Jenert, Tobias and Wagner, Dietrich}, year={2016}, pages={459–478} }'
chicago: 'Brahm, Taiga, Tobias Jenert, and Dietrich Wagner. “The Crucial First Year:
A Longitudinal Study of Students’ Motivational Development at a Swiss Business
School.” Higher Education 73, no. 3 (2016): 459–78. https://doi.org/10.1007/s10734-016-0095-8.'
ieee: 'T. Brahm, T. Jenert, and D. Wagner, “The crucial first year: a longitudinal
study of students’ motivational development at a Swiss Business School,” Higher
Education, vol. 73, no. 3, pp. 459–478, 2016.'
mla: 'Brahm, Taiga, et al. “The Crucial First Year: A Longitudinal Study of Students’
Motivational Development at a Swiss Business School.” Higher Education,
vol. 73, no. 3, Springer Nature, 2016, pp. 459–78, doi:10.1007/s10734-016-0095-8.'
short: T. Brahm, T. Jenert, D. Wagner, Higher Education 73 (2016) 459–478.
date_created: 2018-09-18T08:58:54Z
date_updated: 2022-01-06T07:01:03Z
department:
- _id: '208'
- _id: '282'
doi: 10.1007/s10734-016-0095-8
extern: '1'
intvolume: ' 73'
issue: '3'
keyword:
- Transition to higher education
- Motivation
- Longitudinal study
- Socio-cultural factors
- Latent change model
- Switzerland
page: 459-478
publication: Higher Education
publication_identifier:
issn:
- 0018-1560
- 1573-174X
publication_status: published
publisher: Springer Nature
status: public
title: 'The crucial first year: a longitudinal study of students’ motivational development
at a Swiss Business School'
type: journal_article
user_id: '51057'
volume: 73
year: '2016'
...
---
_id: '9963'
abstract:
- lang: eng
text: Tire-wheel assembly is the only connection between road and vehicle. Contacting
directly with road within postcard size of contact area, it is mounted and guided
by the suspension system. Therefore kinematics and compliances of suspension system
greatly influence the frictional coupling of tire tread elements and road surface
asperities by affecting pressure and sliding velocity distribution in the contact
zone. This study emphasizes the development of a numerical methodology for frictional
rolling contact analysis with focus on interaction of suspension system dynamics
and tire-road contact using ADAMS. For this purpose a comprehensive flexible multibody
system of the multi-link rear suspension is established, where both flexible and
rigid bodies are modeled to allow large displacements with included elastic effects.
To meet accuracy requirements for the high frequency applications, such as road
excitations, the amplitude- and frequency-dependency of rubber-metal bushings
is included. Furthermore the proposed flexible viscoelastic suspension model is
enhanced by a Flexible Ring Tire Model (FTire), which describes a 3D tire dynamic
response and covers any road excitations by tread submodel connected to road surface
model. Concerning the verification and validation procedure numerous experiments
are carried out to confirm the validity and the accuracy of both the developed
submodels and the entire model. The devised approach makes it possible to investigate
the influence of suspension system design on dynamical rolling contact and to
evaluate tire tread wear. Therefore it can be a useful tool to predict frictional
power distribution within the contact area under more realistic conditions.
author:
- first_name: Sergej
full_name: Kohl, Sergej
last_name: Kohl
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Sebastian
full_name: Schulze, Sebastian
last_name: Schulze
citation:
ama: 'Kohl S, Sextro W, Schulze S. Aspects of Flexible Viscoelastic Suspension Modeling
for Frictional Rolling Contact Analysis using ADAMS. In: The 2nd International
Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya,
Malaysia, 2016. Cyberjaya, Malaysia, 2016; 2016:1-12.'
apa: Kohl, S., Sextro, W., & Schulze, S. (2016). Aspects of Flexible Viscoelastic
Suspension Modeling for Frictional Rolling Contact Analysis using ADAMS. In The
2nd International Conference on Automotive Innovation and Green Energy Vehicle
(AiGEV 2016), Cyberjaya, Malaysia, 2016. (pp. 1–12). Cyberjaya, Malaysia,
2016.
bibtex: '@inproceedings{Kohl_Sextro_Schulze_2016, place={Cyberjaya, Malaysia, 2016},
title={Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling
Contact Analysis using ADAMS}, booktitle={The 2nd International Conference on
Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia,
2016.}, author={Kohl, Sergej and Sextro, Walter and Schulze, Sebastian}, year={2016},
pages={1–12} }'
chicago: Kohl, Sergej, Walter Sextro, and Sebastian Schulze. “Aspects of Flexible
Viscoelastic Suspension Modeling for Frictional Rolling Contact Analysis Using
ADAMS.” In The 2nd International Conference on Automotive Innovation and Green
Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016., 1–12. Cyberjaya,
Malaysia, 2016, 2016.
ieee: S. Kohl, W. Sextro, and S. Schulze, “Aspects of Flexible Viscoelastic Suspension
Modeling for Frictional Rolling Contact Analysis using ADAMS,” in The 2nd International
Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya,
Malaysia, 2016., 2016, pp. 1–12.
mla: Kohl, Sergej, et al. “Aspects of Flexible Viscoelastic Suspension Modeling
for Frictional Rolling Contact Analysis Using ADAMS.” The 2nd International
Conference on Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya,
Malaysia, 2016., 2016, pp. 1–12.
short: 'S. Kohl, W. Sextro, S. Schulze, in: The 2nd International Conference on
Automotive Innovation and Green Energy Vehicle (AiGEV 2016), Cyberjaya, Malaysia,
2016., Cyberjaya, Malaysia, 2016, 2016, pp. 1–12.'
date_created: 2019-05-27T09:13:14Z
date_updated: 2019-05-27T09:13:54Z
department:
- _id: '151'
keyword:
- Kinematics and compliances
- flexible viscoelastic suspension model
- frictional rolling contact analysis
- frictional power distribution.
language:
- iso: eng
page: 1-12
place: Cyberjaya, Malaysia, 2016
publication: The 2nd International Conference on Automotive Innovation and Green Energy
Vehicle (AiGEV 2016), Cyberjaya, Malaysia, 2016.
status: public
title: Aspects of Flexible Viscoelastic Suspension Modeling for Frictional Rolling
Contact Analysis using ADAMS
type: conference
user_id: '55222'
year: '2016'
...
---
_id: '9967'
abstract:
- lang: eng
text: Multibody models of mechatronic systems are usually interdisciplinary and
are continuously gaining complexity, due to a growing demand for comprehensive
models of systems including effects of electro mechanics, elastic bodies, contacts
and friction. To be capable of simulating large models with subassemblies and
contact between bodies, reduction techniques are required, which need certain
experience in the choice of parameters. This publication discusses different possibilities
for the modal description of structures in flexible multibody models with application
to an Adaptive Frontlighting System in ADAMS. It will be shown that mode count,
assembling of structures before and after modal reduction and influence of damping
parameters of particular structures and subassemblies affect the behavior of the
entire system. A common reduction technique for flexible structures in multibody
models is the component mode synthesis, which uses a certain number of modes for
description of the modal behavior of a structure. The influence of the mode count
will be shown by means of different modal descriptions of one structure that contributes
to a comprehensive model. Another study will prove that modal data of subassemblies
and assemblies of modal reduced single structures lead to different models. The
definition of damping parameters depends on the number of structures that have
been added to an assembly before modal reduction and on the number of modal reduced
structures. The comparison of subassemblies and the entire model to experimental
data will highlight the accuracy, computational overhead, complexity of models
and modeling efficiency of the comprehensive model for the frontlighting system.
author:
- first_name: Sebastian
full_name: Schulze, Sebastian
last_name: Schulze
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Sergej
full_name: Kohl, Sergej
last_name: Kohl
citation:
ama: 'Schulze S, Sextro W, Kohl S. Using Adequate Reduced Models for Flexible Multibody
Systems of Automotive Mechatronic Systems. In: 2nd International Conference
on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016. ;
2016:1-11.'
apa: Schulze, S., Sextro, W., & Kohl, S. (2016). Using Adequate Reduced Models
for Flexible Multibody Systems of Automotive Mechatronic Systems. In 2nd International
Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia
2016 (pp. 1–11).
bibtex: '@inproceedings{Schulze_Sextro_Kohl_2016, title={Using Adequate Reduced
Models for Flexible Multibody Systems of Automotive Mechatronic Systems}, booktitle={2nd
International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV)
Malaysia 2016}, author={Schulze, Sebastian and Sextro, Walter and Kohl, Sergej},
year={2016}, pages={1–11} }'
chicago: Schulze, Sebastian, Walter Sextro, and Sergej Kohl. “Using Adequate Reduced
Models for Flexible Multibody Systems of Automotive Mechatronic Systems.” In 2nd
International Conference on Automotive Innovation and Green Energy Vehicle (AiGEV)
Malaysia 2016, 1–11, 2016.
ieee: S. Schulze, W. Sextro, and S. Kohl, “Using Adequate Reduced Models for Flexible
Multibody Systems of Automotive Mechatronic Systems,” in 2nd International
Conference on Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia
2016, 2016, pp. 1–11.
mla: Schulze, Sebastian, et al. “Using Adequate Reduced Models for Flexible Multibody
Systems of Automotive Mechatronic Systems.” 2nd International Conference on
Automotive Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016, 2016,
pp. 1–11.
short: 'S. Schulze, W. Sextro, S. Kohl, in: 2nd International Conference on Automotive
Innovation and Green Energy Vehicle (AiGEV) Malaysia 2016, 2016, pp. 1–11.'
date_created: 2019-05-27T09:19:20Z
date_updated: 2019-05-27T09:19:49Z
department:
- _id: '151'
keyword:
- model reduction
- modal description
- flexible multibody systems
language:
- iso: eng
page: 1-11
publication: 2nd International Conference on Automotive Innovation and Green Energy
Vehicle (AiGEV) Malaysia 2016
status: public
title: Using Adequate Reduced Models for Flexible Multibody Systems of Automotive
Mechatronic Systems
type: conference
user_id: '55222'
year: '2016'
...
---
_id: '48838'
abstract:
- lang: eng
text: 'The majority of algorithms can be controlled or adjusted by parameters. Their
values can substantially affect the algorithms’ performance. Since the manual
exploration of the parameter space is tedious – even for few parameters – several
automatic procedures for parameter tuning have been proposed. Recent approaches
also take into account some characteristic properties of the problem instances,
frequently termed instance features. Our contribution is the proposal of a novel
concept for feature-based algorithm parameter tuning, which applies an approximating
surrogate model for learning the continuous feature-parameter mapping. To accomplish
this, we learn a joint model of the algorithm performance based on both the algorithm
parameters and the instance features. The required data is gathered using a recently
proposed acquisition function for model refinement in surrogate-based optimization:
the profile expected improvement. This function provides an avenue for maximizing
the information required for the feature-parameter mapping, i.e., the mapping
from instance features to the corresponding optimal algorithm parameters. The
approach is validated by applying the tuner to exemplary evolutionary algorithms
and problems, for which theoretically grounded or heuristically determined feature-parameter
mappings are available.'
author:
- first_name: Jakob
full_name: Bossek, Jakob
id: '102979'
last_name: Bossek
orcid: 0000-0002-4121-4668
- first_name: Bernd
full_name: Bischl, Bernd
last_name: Bischl
- first_name: Tobias
full_name: Wagner, Tobias
last_name: Wagner
- first_name: Günter
full_name: Rudolph, Günter
last_name: Rudolph
citation:
ama: 'Bossek J, Bischl B, Wagner T, Rudolph G. Learning Feature-Parameter Mappings
for Parameter Tuning via the Profile Expected Improvement. In: Proceedings
of the Genetic and Evolutionary Computation Conference. GECCO ’15. Association
for Computing Machinery; 2015:1319–1326. doi:10.1145/2739480.2754673'
apa: Bossek, J., Bischl, B., Wagner, T., & Rudolph, G. (2015). Learning Feature-Parameter
Mappings for Parameter Tuning via the Profile Expected Improvement. Proceedings
of the Genetic and Evolutionary Computation Conference, 1319–1326. https://doi.org/10.1145/2739480.2754673
bibtex: '@inproceedings{Bossek_Bischl_Wagner_Rudolph_2015, place={New York, NY,
USA}, series={GECCO ’15}, title={Learning Feature-Parameter Mappings for Parameter
Tuning via the Profile Expected Improvement}, DOI={10.1145/2739480.2754673},
booktitle={Proceedings of the Genetic and Evolutionary Computation Conference},
publisher={Association for Computing Machinery}, author={Bossek, Jakob and Bischl,
Bernd and Wagner, Tobias and Rudolph, Günter}, year={2015}, pages={1319–1326},
collection={GECCO ’15} }'
chicago: 'Bossek, Jakob, Bernd Bischl, Tobias Wagner, and Günter Rudolph. “Learning
Feature-Parameter Mappings for Parameter Tuning via the Profile Expected Improvement.”
In Proceedings of the Genetic and Evolutionary Computation Conference,
1319–1326. GECCO ’15. New York, NY, USA: Association for Computing Machinery,
2015. https://doi.org/10.1145/2739480.2754673.'
ieee: 'J. Bossek, B. Bischl, T. Wagner, and G. Rudolph, “Learning Feature-Parameter
Mappings for Parameter Tuning via the Profile Expected Improvement,” in Proceedings
of the Genetic and Evolutionary Computation Conference, 2015, pp. 1319–1326,
doi: 10.1145/2739480.2754673.'
mla: Bossek, Jakob, et al. “Learning Feature-Parameter Mappings for Parameter Tuning
via the Profile Expected Improvement.” Proceedings of the Genetic and Evolutionary
Computation Conference, Association for Computing Machinery, 2015, pp. 1319–1326,
doi:10.1145/2739480.2754673.
short: 'J. Bossek, B. Bischl, T. Wagner, G. Rudolph, in: Proceedings of the Genetic
and Evolutionary Computation Conference, Association for Computing Machinery,
New York, NY, USA, 2015, pp. 1319–1326.'
date_created: 2023-11-14T15:58:51Z
date_updated: 2023-12-13T10:40:30Z
department:
- _id: '819'
doi: 10.1145/2739480.2754673
extern: '1'
keyword:
- evolutionary algorithms
- model-based optimization
- parameter tuning
language:
- iso: eng
page: 1319–1326
place: New York, NY, USA
publication: Proceedings of the Genetic and Evolutionary Computation Conference
publication_identifier:
isbn:
- 978-1-4503-3472-3
publication_status: published
publisher: Association for Computing Machinery
series_title: GECCO ’15
status: public
title: Learning Feature-Parameter Mappings for Parameter Tuning via the Profile Expected
Improvement
type: conference
user_id: '102979'
year: '2015'
...
---
_id: '1134'
abstract:
- lang: eng
text: This paper focuses on the first step in combining prescriptive analytics with
scenario techniques in order to provide strategicdevelopment after the useof InSciTe,
a data prescriptive analytics application. InSciTe supports the improvement of
researchers‘ individual performance by recommending new research directions. Standardized
influential factors are presented as a foundation for automated scenario modelling
such as the prototypical report generation function of InSciTe. Additionally,
a use-case is shown which validatesthe potential of the standardized influential
factors for raw scenario development.
author:
- first_name: Jens
full_name: Weber, Jens
last_name: Weber
- first_name: Cho
full_name: Minhee, Cho
last_name: Minhee
- first_name: Mikyoung
full_name: Lee, Mikyoung
last_name: Lee
- first_name: Sa-kwang
full_name: Song, Sa-kwang
last_name: Song
- first_name: Michaela
full_name: Geierhos, Michaela
id: '42496'
last_name: Geierhos
orcid: 0000-0002-8180-5606
- first_name: Hanmin
full_name: Jung, Hanmin
last_name: Jung
citation:
ama: 'Weber J, Minhee C, Lee M, Song S, Geierhos M, Jung H. System Thinking: Crafting
Scenarios for Prescriptive Analytics. In: Jung H, Mandl T, Womsen-Hacker C, Xu
S, eds. Proceedings of the First International Workshop on Patent Mining and
Its Applications (IPaMin 2014) Co-Located with Konvens 2014. Vol 1292. CEUR
Workshop Proceedings. CEUR-WS.org; 2014.'
apa: 'Weber, J., Minhee, C., Lee, M., Song, S., Geierhos, M., & Jung, H. (2014).
System Thinking: Crafting Scenarios for Prescriptive Analytics. In H. Jung, T.
Mandl, C. Womsen-Hacker, & S. Xu (Eds.), Proceedings of the First International
Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located with Konvens
2014 (Vol. 1292). Hildesheim, Germany: CEUR-WS.org.'
bibtex: '@inproceedings{Weber_Minhee_Lee_Song_Geierhos_Jung_2014, series={CEUR Workshop
Proceedings}, title={System Thinking: Crafting Scenarios for Prescriptive Analytics},
volume={1292}, booktitle={Proceedings of the First International Workshop on Patent
Mining and Its Applications (IPaMin 2014) co-located with Konvens 2014}, publisher={CEUR-WS.org},
author={Weber, Jens and Minhee, Cho and Lee, Mikyoung and Song, Sa-kwang and Geierhos,
Michaela and Jung, Hanmin}, editor={Jung, Hanmin and Mandl, Thomas and Womsen-Hacker,
Christa and Xu, ShuoEditors}, year={2014}, collection={CEUR Workshop Proceedings}
}'
chicago: 'Weber, Jens, Cho Minhee, Mikyoung Lee, Sa-kwang Song, Michaela Geierhos,
and Hanmin Jung. “System Thinking: Crafting Scenarios for Prescriptive Analytics.”
In Proceedings of the First International Workshop on Patent Mining and Its
Applications (IPaMin 2014) Co-Located with Konvens 2014, edited by Hanmin
Jung, Thomas Mandl, Christa Womsen-Hacker, and Shuo Xu, Vol. 1292. CEUR Workshop
Proceedings. CEUR-WS.org, 2014.'
ieee: 'J. Weber, C. Minhee, M. Lee, S. Song, M. Geierhos, and H. Jung, “System Thinking:
Crafting Scenarios for Prescriptive Analytics,” in Proceedings of the First
International Workshop on Patent Mining and Its Applications (IPaMin 2014) co-located
with Konvens 2014, Hildesheim, Germany, 2014, vol. 1292.'
mla: 'Weber, Jens, et al. “System Thinking: Crafting Scenarios for Prescriptive
Analytics.” Proceedings of the First International Workshop on Patent Mining
and Its Applications (IPaMin 2014) Co-Located with Konvens 2014, edited by
Hanmin Jung et al., vol. 1292, CEUR-WS.org, 2014.'
short: 'J. Weber, C. Minhee, M. Lee, S. Song, M. Geierhos, H. Jung, in: H. Jung,
T. Mandl, C. Womsen-Hacker, S. Xu (Eds.), Proceedings of the First International
Workshop on Patent Mining and Its Applications (IPaMin 2014) Co-Located with Konvens
2014, CEUR-WS.org, 2014.'
conference:
end_date: 2014-10-07
location: Hildesheim, Germany
name: First International Workshop on Patent Mining and Its Applications (IPaMin
2014)
start_date: 2014-10-06
date_created: 2018-01-30T15:27:08Z
date_updated: 2022-01-06T06:50:59Z
department:
- _id: '36'
- _id: '1'
- _id: '579'
editor:
- first_name: Hanmin
full_name: Jung, Hanmin
last_name: Jung
- first_name: Thomas
full_name: Mandl, Thomas
last_name: Mandl
- first_name: Christa
full_name: Womsen-Hacker, Christa
last_name: Womsen-Hacker
- first_name: Shuo
full_name: Xu, Shuo
last_name: Xu
intvolume: ' 1292'
keyword:
- Standardized Influential Factors
- Prescriptive Analytics
- Role Model Group
- Scenario Technique
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://ceur-ws.org/Vol-1292/ipamin2014_paper1.pdf
oa: '1'
publication: Proceedings of the First International Workshop on Patent Mining and
Its Applications (IPaMin 2014) co-located with Konvens 2014
publication_identifier:
issn:
- '16130073'
publication_status: published
publisher: CEUR-WS.org
quality_controlled: '1'
series_title: CEUR Workshop Proceedings
status: public
title: 'System Thinking: Crafting Scenarios for Prescriptive Analytics'
type: conference
user_id: '42496'
volume: 1292
year: '2014'
...
---
_id: '4474'
abstract:
- lang: eng
text: The transition from school to university can be overwhelming for some students.
While students' motivation is considered a strong predictor of performance, the
development of motivation during students' transition from high school to university
has rarely been investigated. Additionally, little is known about the relation
of motivational aspects with other influences on study performance. The present
mixed methods study addresses this research gap and examines the development of
economics students' study motivation. The longitudinal mixed-method study included
three waves of data collected using quantitative surveys and a series of five
interviews conducted with 14 first-year students over eight months. Regarding
students' development over time, the quantitative analysis showed a gradual decline
in students' motivation. However, in the interviews, certain events during the
first year were identified as critical incidents demotivating students. These
insights into the development of students' motivation at a business school show
that concrete incidents influence students' motivational development; thus, they
could be transformed by structural changes.
author:
- first_name: Taiga
full_name: Brahm, Taiga
last_name: Brahm
- first_name: Tobias
full_name: Jenert, Tobias
id: '71994'
last_name: Jenert
orcid: ' https://orcid.org/0000-0001-9262-5646'
citation:
ama: 'Brahm T, Jenert T. The crucial first year: The development of students’ motivation
at a Business School-a Mixed Methods Study. In: ; 2014.'
apa: 'Brahm, T., & Jenert, T. (2014). The crucial first year: The development
of students’ motivation at a Business School-a Mixed Methods Study. Presented
at the SIG4 Higher Education & SIG17 Qualitative and Quantitative Approaches
to Learning and Instruction Earli SIG Conference 2014, Leuven.'
bibtex: '@inproceedings{Brahm_Jenert_2014, title={The crucial first year: The development
of students’ motivation at a Business School-a Mixed Methods Study}, author={Brahm,
Taiga and Jenert, Tobias}, year={2014} }'
chicago: 'Brahm, Taiga, and Tobias Jenert. “The Crucial First Year: The Development
of Students’ Motivation at a Business School-a Mixed Methods Study,” 2014.'
ieee: 'T. Brahm and T. Jenert, “The crucial first year: The development of students’
motivation at a Business School-a Mixed Methods Study,” presented at the SIG4
Higher Education & SIG17 Qualitative and Quantitative Approaches to Learning
and Instruction Earli SIG Conference 2014, Leuven, 2014.'
mla: 'Brahm, Taiga, and Tobias Jenert. The Crucial First Year: The Development
of Students’ Motivation at a Business School-a Mixed Methods Study. 2014.'
short: 'T. Brahm, T. Jenert, in: 2014.'
conference:
end_date: 2014-08-22
location: Leuven
name: SIG4 Higher Education & SIG17 Qualitative and Quantitative Approaches to Learning
and Instruction Earli SIG Conference 2014
start_date: 2014-08-20
date_created: 2018-09-19T08:06:46Z
date_updated: 2022-01-06T07:01:06Z
department:
- _id: '208'
- _id: '282'
extern: '1'
keyword:
- motivation
- business school
- higher education
- latent growth curve model
- longitudinal study
- mixed methods
- interview
- students
status: public
title: 'The crucial first year: The development of students'' motivation at a Business
School-a Mixed Methods Study'
type: conference
user_id: '51057'
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: '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: '9895'
abstract:
- lang: eng
text: Power semiconductor modules are used to control and switch high electrical
currents and voltages. Within the power module package wire bonding is used as
an interconnection technology. In recent years, aluminum wire has been used preferably,
but an ever-growing market of powerful and efficient power modules requires a
material with better mechanical and electrical properties. For this reason, a
technology change from aluminum to copper is indispensable. However, the copper
wire bonding process reacts more sensitive to parameter changes. This makes manufacturing
reliable copper bond connections a challenging task. The aim of the BMBF funded
project Itsowl-InCuB is the development of self-optimizing techniques to enable
the reliable production of copper bond connections under varying conditions. A
model of the process is essential to achieve this aim. This model needs to include
the dynamic elasto-plastic deformation, the ultrasonic softening effect and the
proceeding adhesion between wire and substrate. This paper focusses on the pre-deformation
process. In the touchdown phase, the wire is pressed into the V-groove of the
tool and a small initial contact area between wire and substrate arise. The local
characteristics of the material change abruptly because of the cold forming. Consequently,
the pre-deformation has a strong effect on the joining process. In [1], a pre-cleaning
effect during the touchdown process of aluminum wires by cracking of oxide layers
was presented. These interactions of the process parameters are still largely
unknown for copper. In a first step, this paper validates the importance of modeling
the pre-deformation by showing its impact on the wire deformation characteristic
experimentally. Creating cross-section views of pre-deformed copper wires has
shown a low deformation degree compared to aluminum. By using a digital microscope
and a scanning confocal microscope an analysis about the contact areas and penetration
depths after touchdown has been made. Additionally, it has to be taken into account
that the dynamical touchdown force depends on the touchdown speed and the touchdown
force set in the bonding machine. In order to measure the overshoot in the force
signals, a strain gauge sensor has been used. Subsequently, the affecting factors
have been interpreted independently Furthermore, the material properties of copper
wire have been investigated with tensile tests and hardness measurements. In a
second step, the paper presents finite element models of the touchdown process
for source and destination bonds. These models take the measured overshoot in
the touchdown forces into account. A multi-linear, isotropic material model has
been selected to map the material properties of the copper. A validation of the
model with the experimental determined contact areas, normal pressures and penetration
depths reveals the high model quality. Thus, the simulation is able to calculate
and visualize the three dimensional pre-deformation with an integrated material
parameter of the wire if the touchdown parameters of the bonding machine are known.
Based on the calculated deformation degrees of wire and substrate, it is probably
possible to investigate the effect of the pre-deformation on the pre-cleaning
phase in the copper wire bonding.
author:
- first_name: Andreas
full_name: Unger, Andreas
last_name: Unger
- first_name: Walter
full_name: Sextro, Walter
id: '21220'
last_name: Sextro
- first_name: Simon
full_name: Althoff, Simon
last_name: Althoff
- first_name: Paul
full_name: Eichwald, Paul
last_name: Eichwald
- first_name: Tobias
full_name: Meyer, Tobias
last_name: Meyer
- first_name: Florian
full_name: Eacock, Florian
last_name: Eacock
- first_name: Michael
full_name: Brökelmann, Michael
last_name: Brökelmann
citation:
ama: 'Unger A, Sextro W, Althoff S, et al. Experimental and Numerical Simulation
Study of Pre-Deformed Heavy Copper Wire Wedge Bonds. In: Proceedings of the
47th International Symposium on Microelectronics (IMAPS). San Diego, CA, US;
2014:289-294.'
apa: Unger, A., Sextro, W., Althoff, S., Eichwald, P., Meyer, T., Eacock, F., &
Brökelmann, M. (2014). Experimental and Numerical Simulation Study of Pre-Deformed
Heavy Copper Wire Wedge Bonds. In Proceedings of the 47th International Symposium
on Microelectronics (IMAPS) (pp. 289–294). San Diego, CA, US.
bibtex: '@inproceedings{Unger_Sextro_Althoff_Eichwald_Meyer_Eacock_Brökelmann_2014,
place={San Diego, CA, US}, title={Experimental and Numerical Simulation Study
of Pre-Deformed Heavy Copper Wire Wedge Bonds}, booktitle={Proceedings of the
47th International Symposium on Microelectronics (IMAPS)}, author={Unger, Andreas
and Sextro, Walter and Althoff, Simon and Eichwald, Paul and Meyer, Tobias and
Eacock, Florian and Brökelmann, Michael}, year={2014}, pages={289–294} }'
chicago: Unger, Andreas, Walter Sextro, Simon Althoff, Paul Eichwald, Tobias Meyer,
Florian Eacock, and Michael Brökelmann. “Experimental and Numerical Simulation
Study of Pre-Deformed Heavy Copper Wire Wedge Bonds.” In Proceedings of the
47th International Symposium on Microelectronics (IMAPS), 289–94. San Diego,
CA, US, 2014.
ieee: A. Unger et al., “Experimental and Numerical Simulation Study of Pre-Deformed
Heavy Copper Wire Wedge Bonds,” in Proceedings of the 47th International Symposium
on Microelectronics (IMAPS), 2014, pp. 289–294.
mla: Unger, Andreas, et al. “Experimental and Numerical Simulation Study of Pre-Deformed
Heavy Copper Wire Wedge Bonds.” Proceedings of the 47th International Symposium
on Microelectronics (IMAPS), 2014, pp. 289–94.
short: 'A. Unger, W. Sextro, S. Althoff, P. Eichwald, T. Meyer, F. Eacock, M. Brökelmann,
in: Proceedings of the 47th International Symposium on Microelectronics (IMAPS),
San Diego, CA, US, 2014, pp. 289–294.'
date_created: 2019-05-20T13:35:09Z
date_updated: 2020-05-07T05:33:47Z
department:
- _id: '151'
keyword:
- pre-deformation
- copper wire bonding
- finite element model
language:
- iso: eng
page: 289-294
place: San Diego, CA, US
project:
- _id: '92'
grant_number: 02 PQ2210
name: Intelligente Herstellung zuverlässiger Kupferbondverbindungen
publication: Proceedings of the 47th International Symposium on Microelectronics (IMAPS)
status: public
title: Experimental and Numerical Simulation Study of Pre-Deformed Heavy Copper Wire
Wedge Bonds
type: conference
user_id: '210'
year: '2014'
...
---
_id: '11753'
abstract:
- lang: eng
text: This contribution describes a step-wise source counting algorithm to determine
the number of speakers in an offline scenario. Each speaker is identified by a
variational expectation maximization (VEM) algorithm for complex Watson mixture
models and therefore directly yields beamforming vectors for a subsequent speech
separation process. An observation selection criterion is proposed which improves
the robustness of the source counting in noise. The algorithm is compared to an
alternative VEM approach with Gaussian mixture models based on directions of arrival
and shown to deliver improved source counting accuracy. The article concludes
by extending the offline algorithm towards a low-latency online estimation of
the number of active sources from the streaming input data.
author:
- first_name: Lukas
full_name: Drude, Lukas
id: '11213'
last_name: Drude
- first_name: Aleksej
full_name: Chinaev, Aleksej
last_name: Chinaev
- first_name: Dang Hai
full_name: Tran Vu, Dang Hai
last_name: Tran Vu
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Drude L, Chinaev A, Tran Vu DH, Haeb-Umbach R. Towards Online Source Counting
in Speech Mixtures Applying a Variational EM for Complex Watson Mixture Models.
In: 14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014).
; 2014:213-217.'
apa: Drude, L., Chinaev, A., Tran Vu, D. H., & Haeb-Umbach, R. (2014). Towards
Online Source Counting in Speech Mixtures Applying a Variational EM for Complex
Watson Mixture Models. In 14th International Workshop on Acoustic Signal Enhancement
(IWAENC 2014) (pp. 213–217).
bibtex: '@inproceedings{Drude_Chinaev_Tran Vu_Haeb-Umbach_2014, title={Towards Online
Source Counting in Speech Mixtures Applying a Variational EM for Complex Watson
Mixture Models}, booktitle={14th International Workshop on Acoustic Signal Enhancement
(IWAENC 2014)}, author={Drude, Lukas and Chinaev, Aleksej and Tran Vu, Dang Hai
and Haeb-Umbach, Reinhold}, year={2014}, pages={213–217} }'
chicago: Drude, Lukas, Aleksej Chinaev, Dang Hai Tran Vu, and Reinhold Haeb-Umbach.
“Towards Online Source Counting in Speech Mixtures Applying a Variational EM for
Complex Watson Mixture Models.” In 14th International Workshop on Acoustic
Signal Enhancement (IWAENC 2014), 213–17, 2014.
ieee: L. Drude, A. Chinaev, D. H. Tran Vu, and R. Haeb-Umbach, “Towards Online Source
Counting in Speech Mixtures Applying a Variational EM for Complex Watson Mixture
Models,” in 14th International Workshop on Acoustic Signal Enhancement (IWAENC
2014), 2014, pp. 213–217.
mla: Drude, Lukas, et al. “Towards Online Source Counting in Speech Mixtures Applying
a Variational EM for Complex Watson Mixture Models.” 14th International Workshop
on Acoustic Signal Enhancement (IWAENC 2014), 2014, pp. 213–17.
short: 'L. Drude, A. Chinaev, D.H. Tran Vu, R. Haeb-Umbach, in: 14th International
Workshop on Acoustic Signal Enhancement (IWAENC 2014), 2014, pp. 213–217.'
date_created: 2019-07-12T05:27:35Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
keyword:
- Accuracy
- Acoustics
- Estimation
- Mathematical model
- Soruce separation
- Speech
- Vectors
- Bayes methods
- Blind source separation
- Directional statistics
- Number of speakers
- Speaker diarization
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14.pdf
oa: '1'
page: 213-217
publication: 14th International Workshop on Acoustic Signal Enhancement (IWAENC 2014)
related_material:
link:
- description: Poster
relation: supplementary_material
url: https://groups.uni-paderborn.de/nt/pubs/2014/DrChTrHaeb14_Poster.pdf
status: public
title: Towards Online Source Counting in Speech Mixtures Applying a Variational EM
for Complex Watson Mixture Models
type: conference
user_id: '44006'
year: '2014'
...
---
_id: '11861'
abstract:
- lang: eng
text: 'In this contribution we present a theoretical and experimental investigation
into the effects of reverberation and noise on features in the logarithmic mel
power spectral domain, an intermediate stage in the computation of the mel frequency
cepstral coefficients, prevalent in automatic speech recognition (ASR). Gaining
insight into the complex interaction between clean speech, noise, and noisy reverberant
speech features is essential for any ASR system to be robust against noise and
reverberation present in distant microphone input signals. The findings are gathered
in a probabilistic formulation of an observation model which may be used in model-based
feature compensation schemes. The proposed observation model extends previous
models in three major directions: First, the contribution of additive background
noise to the observation error is explicitly taken into account. Second, an energy
compensation constant is introduced which ensures an unbiased estimate of the
reverberant speech features, and, third, a recursive variant of the observation
model is developed resulting in reduced computational complexity when used in
model-based feature compensation. The experimental section is used to evaluate
the accuracy of the model and to describe how its parameters can be determined
from test data.'
author:
- first_name: Volker
full_name: Leutnant, Volker
last_name: Leutnant
- first_name: Alexander
full_name: Krueger, Alexander
last_name: Krueger
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Leutnant V, Krueger A, Haeb-Umbach R. A New Observation Model in the Logarithmic
Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.
IEEE/ACM Transactions on Audio, Speech, and Language Processing. 2014;22(1):95-109.
doi:10.1109/TASLP.2013.2285480
apa: Leutnant, V., Krueger, A., & Haeb-Umbach, R. (2014). A New Observation
Model in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition
of Noisy Reverberant Speech. IEEE/ACM Transactions on Audio, Speech, and Language
Processing, 22(1), 95–109. https://doi.org/10.1109/TASLP.2013.2285480
bibtex: '@article{Leutnant_Krueger_Haeb-Umbach_2014, title={A New Observation Model
in the Logarithmic Mel Power Spectral Domain for the Automatic Recognition of
Noisy Reverberant Speech}, volume={22}, DOI={10.1109/TASLP.2013.2285480},
number={1}, journal={IEEE/ACM Transactions on Audio, Speech, and Language Processing},
author={Leutnant, Volker and Krueger, Alexander and Haeb-Umbach, Reinhold}, year={2014},
pages={95–109} }'
chicago: 'Leutnant, Volker, Alexander Krueger, and Reinhold Haeb-Umbach. “A New
Observation Model in the Logarithmic Mel Power Spectral Domain for the Automatic
Recognition of Noisy Reverberant Speech.” IEEE/ACM Transactions on Audio, Speech,
and Language Processing 22, no. 1 (2014): 95–109. https://doi.org/10.1109/TASLP.2013.2285480.'
ieee: V. Leutnant, A. Krueger, and R. Haeb-Umbach, “A New Observation Model in the
Logarithmic Mel Power Spectral Domain for the Automatic Recognition of Noisy Reverberant
Speech,” IEEE/ACM Transactions on Audio, Speech, and Language Processing,
vol. 22, no. 1, pp. 95–109, 2014.
mla: Leutnant, Volker, et al. “A New Observation Model in the Logarithmic Mel Power
Spectral Domain for the Automatic Recognition of Noisy Reverberant Speech.” IEEE/ACM
Transactions on Audio, Speech, and Language Processing, vol. 22, no. 1, 2014,
pp. 95–109, doi:10.1109/TASLP.2013.2285480.
short: V. Leutnant, A. Krueger, R. Haeb-Umbach, IEEE/ACM Transactions on Audio,
Speech, and Language Processing 22 (2014) 95–109.
date_created: 2019-07-12T05:29:41Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASLP.2013.2285480
intvolume: ' 22'
issue: '1'
keyword:
- computational complexity
- reverberation
- speech recognition
- automatic speech recognition
- background noise
- clean speech
- computational complexity
- energy compensation
- logarithmic mel power spectral domain
- mel frequency cepstral coefficients
- microphone input signals
- model-based feature compensation schemes
- noisy reverberant speech automatic recognition
- noisy reverberant speech features
- reverberation
- Atmospheric modeling
- Computational modeling
- Noise
- Noise measurement
- Reverberation
- Speech
- Vectors
- Model-based feature compensation
- observation model for reverberant and noisy speech
- recursive observation model
- robust automatic speech recognition
language:
- iso: eng
page: 95-109
publication: IEEE/ACM Transactions on Audio, Speech, and Language Processing
publication_identifier:
issn:
- 2329-9290
status: public
title: A New Observation Model in the Logarithmic Mel Power Spectral Domain for the
Automatic Recognition of Noisy Reverberant Speech
type: journal_article
user_id: '44006'
volume: 22
year: '2014'
...
---
_id: '11867'
abstract:
- lang: eng
text: 'New waves of consumer-centric applications, such as voice search and voice
interaction with mobile devices and home entertainment systems, increasingly require
automatic speech recognition (ASR) to be robust to the full range of real-world
noise and other acoustic distorting conditions. Despite its practical importance,
however, the inherent links between and distinctions among the myriad of methods
for noise-robust ASR have yet to be carefully studied in order to advance the
field further. To this end, it is critical to establish a solid, consistent, and
common mathematical foundation for noise-robust ASR, which is lacking at present.
This article is intended to fill this gap and to provide a thorough overview of
modern noise-robust techniques for ASR developed over the past 30 years. We emphasize
methods that are proven to be successful and that are likely to sustain or expand
their future applicability. We distill key insights from our comprehensive overview
in this field and take a fresh look at a few old problems, which nevertheless
are still highly relevant today. Specifically, we have analyzed and categorized
a wide range of noise-robust techniques using five different criteria: 1) feature-domain
vs. model-domain processing, 2) the use of prior knowledge about the acoustic
environment distortion, 3) the use of explicit environment-distortion models,
4) deterministic vs. uncertainty processing, and 5) the use of acoustic models
trained jointly with the same feature enhancement or model adaptation process
used in the testing stage. With this taxonomy-oriented review, we equip the reader
with the insight to choose among techniques and with the awareness of the performance-complexity
tradeoffs. The pros and cons of using different noise-robust ASR techniques in
practical application scenarios are provided as a guide to interested practitioners.
The current challenges and future research directions in this field is also carefully
analyzed.'
author:
- first_name: Jinyu
full_name: Li, Jinyu
last_name: Li
- first_name: Li
full_name: Deng, Li
last_name: Deng
- first_name: Yifan
full_name: Gong, Yifan
last_name: Gong
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: Li J, Deng L, Gong Y, Haeb-Umbach R. An Overview of Noise-Robust Automatic
Speech Recognition. IEEE Transactions on Audio, Speech and Language Processing.
2014;22(4):745-777. doi:10.1109/TASLP.2014.2304637
apa: Li, J., Deng, L., Gong, Y., & Haeb-Umbach, R. (2014). An Overview of Noise-Robust
Automatic Speech Recognition. IEEE Transactions on Audio, Speech and Language
Processing, 22(4), 745–777. https://doi.org/10.1109/TASLP.2014.2304637
bibtex: '@article{Li_Deng_Gong_Haeb-Umbach_2014, title={An Overview of Noise-Robust
Automatic Speech Recognition}, volume={22}, DOI={10.1109/TASLP.2014.2304637},
number={4}, journal={IEEE Transactions on Audio, Speech and Language Processing},
author={Li, Jinyu and Deng, Li and Gong, Yifan and Haeb-Umbach, Reinhold}, year={2014},
pages={745–777} }'
chicago: 'Li, Jinyu, Li Deng, Yifan Gong, and Reinhold Haeb-Umbach. “An Overview
of Noise-Robust Automatic Speech Recognition.” IEEE Transactions on Audio,
Speech and Language Processing 22, no. 4 (2014): 745–77. https://doi.org/10.1109/TASLP.2014.2304637.'
ieee: J. Li, L. Deng, Y. Gong, and R. Haeb-Umbach, “An Overview of Noise-Robust
Automatic Speech Recognition,” IEEE Transactions on Audio, Speech and Language
Processing, vol. 22, no. 4, pp. 745–777, 2014.
mla: Li, Jinyu, et al. “An Overview of Noise-Robust Automatic Speech Recognition.”
IEEE Transactions on Audio, Speech and Language Processing, vol. 22, no.
4, 2014, pp. 745–77, doi:10.1109/TASLP.2014.2304637.
short: J. Li, L. Deng, Y. Gong, R. Haeb-Umbach, IEEE Transactions on Audio, Speech
and Language Processing 22 (2014) 745–777.
date_created: 2019-07-12T05:29:47Z
date_updated: 2022-01-06T06:51:11Z
department:
- _id: '54'
doi: 10.1109/TASLP.2014.2304637
intvolume: ' 22'
issue: '4'
keyword:
- Speech recognition
- compensation
- distortion modeling
- joint model training
- noise
- robustness
- uncertainty processing
language:
- iso: eng
main_file_link:
- open_access: '1'
url: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=6732927
oa: '1'
page: 745-777
publication: IEEE Transactions on Audio, Speech and Language Processing
status: public
title: An Overview of Noise-Robust Automatic Speech Recognition
type: journal_article
user_id: '44006'
volume: 22
year: '2014'
...
---
_id: '11740'
abstract:
- lang: eng
text: In this contribution we derive the Maximum A-Posteriori (MAP) estimates of
the parameters of a Gaussian Mixture Model (GMM) in the presence of noisy observations.
We assume the distortion to be white Gaussian noise of known mean and variance.
An approximate conjugate prior of the GMM parameters is derived allowing for a
computationally efficient implementation in a sequential estimation framework.
Simulations on artificially generated data demonstrate the superiority of the
proposed method compared to the Maximum Likelihood technique and to the ordinary
MAP approach, whose estimates are corrected by the known statistics of the distortion
in a straightforward manner.
author:
- first_name: Aleksej
full_name: Chinaev, Aleksej
last_name: Chinaev
- first_name: Reinhold
full_name: Haeb-Umbach, Reinhold
id: '242'
last_name: Haeb-Umbach
citation:
ama: 'Chinaev A, Haeb-Umbach R. MAP-based Estimation of the Parameters of a Gaussian
Mixture Model in the Presence of Noisy Observations. In: 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013). ; 2013:3352-3356.
doi:10.1109/ICASSP.2013.6638279'
apa: Chinaev, A., & Haeb-Umbach, R. (2013). MAP-based Estimation of the Parameters
of a Gaussian Mixture Model in the Presence of Noisy Observations. In 38th
International Conference on Acoustics, Speech and Signal Processing (ICASSP 2013)
(pp. 3352–3356). https://doi.org/10.1109/ICASSP.2013.6638279
bibtex: '@inproceedings{Chinaev_Haeb-Umbach_2013, title={MAP-based Estimation of
the Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations},
DOI={10.1109/ICASSP.2013.6638279},
booktitle={38th International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2013)}, author={Chinaev, Aleksej and Haeb-Umbach, Reinhold}, year={2013},
pages={3352–3356} }'
chicago: Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the
Parameters of a Gaussian Mixture Model in the Presence of Noisy Observations.”
In 38th International Conference on Acoustics, Speech and Signal Processing
(ICASSP 2013), 3352–56, 2013. https://doi.org/10.1109/ICASSP.2013.6638279.
ieee: A. Chinaev and R. Haeb-Umbach, “MAP-based Estimation of the Parameters of
a Gaussian Mixture Model in the Presence of Noisy Observations,” in 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013), 2013,
pp. 3352–3356.
mla: Chinaev, Aleksej, and Reinhold Haeb-Umbach. “MAP-Based Estimation of the Parameters
of a Gaussian Mixture Model in the Presence of Noisy Observations.” 38th International
Conference on Acoustics, Speech and Signal Processing (ICASSP 2013), 2013,
pp. 3352–56, doi:10.1109/ICASSP.2013.6638279.
short: 'A. Chinaev, R. Haeb-Umbach, in: 38th International Conference on Acoustics,
Speech and Signal Processing (ICASSP 2013), 2013, pp. 3352–3356.'
date_created: 2019-07-12T05:27:20Z
date_updated: 2022-01-06T06:51:08Z
department:
- _id: '54'
doi: 10.1109/ICASSP.2013.6638279
keyword:
- Gaussian noise
- maximum likelihood estimation
- parameter estimation
- GMM parameter
- Gaussian mixture model
- MAP estimation
- Map-based estimation
- maximum a-posteriori estimation
- maximum likelihood technique
- noisy observation
- sequential estimation framework
- white Gaussian noise
- Additive noise
- Gaussian mixture model
- Maximum likelihood estimation
- Noise measurement
- Gaussian mixture model
- Maximum a posteriori estimation
- Maximum likelihood estimation
language:
- iso: eng
main_file_link:
- open_access: '1'
url: https://groups.uni-paderborn.de/nt/pubs/2013/ChHa13.pdf
oa: '1'
page: 3352-3356
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/ChHa13_Poster.pdf
status: public
title: MAP-based Estimation of the Parameters of a Gaussian Mixture Model in the Presence
of Noisy Observations
type: conference
user_id: '44006'
year: '2013'
...