TY  - CHAP
A1  - Müller, Tim M.
A1  - Schmitt, Andreas
A1  - Leise, Philipp
A1  - Meck, Tobias
A1  - Altherr, Lena
A1  - Pelz, Peter F.
A1  - Pfetsch, Marc E.
T1  - Validation of an optimized resilient water supply system
T2  - Uncertainty in Mechanical Engineering
N2  - Component failures within water supply systems can lead to significant performance losses. One way to address these losses is the explicit anticipation of failures within the design process. We consider a water supply system for high-rise buildings, where pump failures are the most likely failure scenarios. We explicitly consider these failures within an early design stage which leads to a more resilient system, i.e., a system which is able to operate under a predefined number of arbitrary pump failures. We use a mathematical optimization approach to compute such a resilient design. This is based on a multi-stage model for topology optimization, which can be described by a system of nonlinear inequalities and integrality constraints. Such a model has to be both computationally tractable and to represent the real-world system accurately. We therefore validate the algorithmic solutions using experiments on a scaled test rig for high-rise buildings. The test rig allows for an arbitrary connection of pumps to reproduce scaled versions of booster station designs for high-rise buildings. We experimentally verify the applicability of the presented optimization model and that the proposed resilience properties are also fulfilled in real systems.
KW  - Optimization
KW  - Mixed-integer nonlinear programming
KW  - Water distribution system
KW  - Resilience
KW  - Validation
Y1  - 2021
SN  - 978-3-030-77255-0
SN  - 978-3-030-77256-7
U6  - https://doi.org/10.1007/978-3-030-77256-7_7
N1  - Proceedings of the 4th International Conference on Uncertainty in Mechanical Engineering (ICUME 2021), June 7–8, 2021
SP  - 70
EP  - 80
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Mandekar, Swati
A1  - Jentsch, Lina
A1  - Lutz, Kai
A1  - Behbahani, Mehdi
A1  - Melnykowycz, Mark
T1  - Earable design analysis for sleep EEG measurements
T2  - UbiComp '21
N2  - Conventional EEG devices cannot be used in everyday life and hence, past decade research has been focused on Ear-EEG for mobile, at-home monitoring for various applications ranging from emotion detection to sleep monitoring. As the area available for electrode contact in the ear is limited, the electrode size and location play a vital role for an Ear-EEG system. In this investigation, we present a quantitative study of ear-electrodes with two electrode sizes at different locations in a wet and dry configuration. Electrode impedance scales inversely with size and ranges from 450 kΩ to 1.29 MΩ for dry and from 22 kΩ to 42 kΩ for wet contact at 10 Hz. For any size, the location in the ear canal with the lowest impedance is ELE (Left Ear Superior), presumably due to increased contact pressure caused by the outer-ear anatomy. The results can be used to optimize signal pickup and SNR for specific applications. We demonstrate this by recording sleep spindles during sleep onset with high quality (5.27 μVrms).
KW  - EEG
KW  - sensors
KW  - Impedance Spectroscopy
KW  - Sleep EEG
KW  - biopotential electrodes
Y1  - 2021
U6  - https://doi.org/10.1145/3460418.3479328
N1  - UbiComp '21: Adjunct Proceedings of the 2021 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2021 ACM International Symposium on Wearable Computers, September 21–26, 2021, Virtual, USA
SP  - 171
EP  - 175
ER  - 
TY  - CHAP
A1  - Hüning, Felix
A1  - Wache, Franz-Josef
A1  - Magiera, David
T1  - Redundant bus systems using dual-mode radio
T2  - Proceedings of Sixth International Congress on Information and Communication Technology
N2  - Communication via serial bus systems, like CAN, plays an important role for all kinds of embedded electronic and mechatronic systems. To cope up with the requirements for functional safety of safety-critical applications, there is a need to enhance the safety features of the communication systems. One measure to achieve a more robust communication is to add redundant data transmission path to the applications. In general, the communication of real-time embedded systems like automotive applications is tethered, and the redundant data transmission lines are also tethered, increasing the size of the wiring harness and the weight of the system. A radio link is preferred as a redundant transmission line as it uses a complementary transmission medium compared to the wired solution and in addition reduces wiring harness size and weight. Standard wireless links like Wi-Fi or Bluetooth cannot meet the requirements for real-time capability with regard to bus communication. Using the new dual-mode radio enables a redundant transmission line meeting all requirements with regard to real-time capability, robustness and transparency for the data bus. In addition, it provides a complementary transmission medium with regard to commonly used tethered links. A CAN bus system is used to demonstrate the redundant data transfer via tethered and wireless CAN.
Y1  - 2021
SN  - 978-981-16-2379-0
SN  - 978-981-16-2380-6
U6  - https://doi.org/10.1007/978-981-16-2380-6_73
N1  - Sixth International Congress on Information and Communication Technology, ICICT 2021, Brunel University, London, February 25–26, 2021
SP  - 835
EP  - 842
PB  - Springer
CY  - Singapore
ER  - 
TY  - CHAP
A1  - Klöser, Lars
A1  - Kohl, Philipp
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - Multi-attribute relation extraction (MARE): simplifying the application of relation extraction
T2  - Proceedings of the 2nd International Conference on Deep Learning Theory and Applications DeLTA - Volume 1
N2  - Natural language understanding’s relation extraction makes innovative and encouraging novel business concepts possible and facilitates new digitilized decision-making processes. Current approaches allow the extraction of relations with a fixed number of entities as attributes. Extracting relations with an arbitrary amount of attributes requires complex systems and costly relation-trigger annotations to assist these systems. We introduce multi-attribute relation extraction (MARE) as an assumption-less problem formulation with two approaches, facilitating an explicit mapping from business use cases to the data annotations. Avoiding elaborated annotation constraints simplifies the application of relation extraction approaches. The evaluation compares our models to current state-of-the-art event extraction and binary relation extraction methods. Our approaches show improvement compared to these on the extraction of general multi-attribute relations.
Y1  - 2021
SN  - 978-989-758-526-5
U6  - https://doi.org/10.5220/0010559201480156
N1  - 2nd International Conference on Deep Learning Theory and Applications, DeLTA2021, July 7-9, 2021
SP  - 148
EP  - 156
PB  - SciTePress
CY  - Setúbal
ER  - 
TY  - CHAP
A1  - Kohl, Philipp
A1  - Schmidts, Oliver
A1  - Klöser, Lars
A1  - Werth, Henri
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - STAMP 4 NLP – an agile framework for rapid quality-driven NLP applications development
T2  - Quality of Information and Communications Technology. QUATIC 2021
N2  - The progress in natural language processing (NLP) research over the last years, offers novel business opportunities for companies, as automated user interaction or improved data analysis. Building sophisticated NLP applications requires dealing with modern machine learning (ML) technologies, which impedes enterprises from establishing successful NLP projects. Our experience in applied NLP research projects shows that the continuous integration of research prototypes in production-like environments with quality assurance builds trust in the software and shows convenience and usefulness regarding the business goal. We introduce STAMP 4 NLP as an iterative and incremental process model for developing NLP applications. With STAMP 4 NLP, we merge software engineering principles with best practices from data science. Instantiating our process model allows efficiently creating prototypes by utilizing templates, conventions, and implementations, enabling developers and data scientists to focus on the business goals. Due to our iterative-incremental approach, businesses can deploy an enhanced version of the prototype to their software environment after every iteration, maximizing potential business value and trust early and avoiding the cost of successful yet never deployed experiments.
KW  - Machine learning
KW  - Process model
KW  - Natural language processing
Y1  - 2021
SN  - 978-3-030-85346-4
SN  - 978-3-030-85347-1
U6  - https://doi.org/10.1007/978-3-030-85347-1_12
N1  - International Conference on the Quality of Information and Communications Technology, QUATIC 2021, 8-11 September, Algarve, Portugal
SP  - 156
EP  - 166
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Schmidts, Oliver
A1  - Kraft, Bodo
A1  - Winkens, Marvin
A1  - Zündorf, Albert
T1  - Catalog integration of heterogeneous and volatile product data
T2  - DATA 2020: Data Management Technologies and Applications
N2  - The integration of frequently changing, volatile product data from different manufacturers into a single catalog is a significant challenge for small and medium-sized e-commerce companies. They rely on timely integrating product data to present them aggregated in an online shop without knowing format specifications, concept understanding of manufacturers, and data quality. Furthermore, format, concepts, and data quality may change at any time. Consequently, integrating product catalogs into a single standardized catalog is often a laborious manual task. Current strategies to streamline or automate catalog integration use techniques based on machine learning, word vectorization, or semantic similarity. However, most approaches struggle with low-quality or real-world data. We propose Attribute Label Ranking (ALR) as a recommendation engine to simplify the integration process of previously unknown, proprietary tabular format into a standardized catalog for practitioners. We evaluate ALR by focusing on the impact of different neural network architectures, language features, and semantic similarity. Additionally, we consider metrics for industrial application and present the impact of ALR in production and its limitations.
Y1  - 2021
SN  - 978-3-030-83013-7
U6  - https://doi.org/10.1007/978-3-030-83014-4_7
N1  - International Conference on Data Management Technologies and Applications, DATA 2020, 7-9 July
SP  - 134
EP  - 153
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Meck, Marvin M.
A1  - Müller, Tim M.
A1  - Altherr, Lena
A1  - Pelz, Peter F.
T1  - Improving an industrial cooling system using MINLP, considering capital and operating costs
T2  - Operations Research Proceedings 2019
N2  - The chemical industry is one of the most important industrial sectors in Germany in terms of manufacturing revenue. While thermodynamic boundary conditions often restrict the scope for reducing the energy consumption of core processes, secondary processes such as cooling offer scope for energy optimisation. In this contribution, we therefore model and optimise an existing cooling system. The technical boundary conditions of the model are provided by the operators, the German chemical company BASF SE. In order to systematically evaluate different degrees of freedom in topology and operation, we formulate and solve a Mixed-Integer Nonlinear Program (MINLP), and compare our optimisation results with the existing system.
KW  - Engineering optimisation
KW  - Mixed-integer programming
KW  - Industrial optimisation
KW  - Cooling system
KW  - Process engineering
Y1  - 2020
SN  - 978-3-030-48438-5 (Print)
SN  - 978-3-030-48439-2 (Online)
U6  - https://doi.org/10.1007/978-3-030-48439-2_61
N1  - Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019.
SP  - 505
EP  - 512
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Müller, Tim M.
A1  - Altherr, Lena
A1  - Leise, Philipp
A1  - Pelz, Peter F.
T1  - Optimization of pumping systems for buildings: Experimental validation of different degrees of model detail on a modular test rig
T2  - Operations Research Proceedings 2019
N2  - Successful optimization requires an appropriate model of the system under consideration. When selecting a suitable level of detail, one has to consider solution quality as well as the computational and implementation effort. In this paper, we present a MINLP for a pumping system for the drinking water supply of high-rise buildings. We investigate the influence of the granularity of the underlying physical models on the solution quality. Therefore, we model the system with a varying level of detail regarding the friction losses, and conduct an experimental validation of our model on a modular test rig. Furthermore, we investigate the computational effort and show that it can be reduced by the integration of domain-specific knowledge.
KW  - Experimental validation
KW  - MINLP
KW  - Engineering optimization
KW  - Water supply system
KW  - Network design
Y1  - 2020
SN  - 978-3-030-48438-5
U6  - https://doi.org/10.1007/978-3-030-48439-2_58
N1  - Annual International Conference of the German Operations Research Society (GOR), Dresden, Germany, September 4-6, 2019
SP  - 481
EP  - 488
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Kessler, Julia
A1  - Balc, Nicolae
A1  - Gebhardt, Andreas
A1  - Abbas, Karim
T1  - Basic research on lattice structures focused on the reliance of the cross sectional area and additional coatings
T2  - The 4th International Conference on Computing and Solutions in Manufacturing Engineering 2016 – CoSME’16
Y1  - 2017
U6  - https://doi.org/10.1051/matecconf/20179403008
N1  - MATEC Web Conf. Vol 94, 2017, 03008
MATEC Web of Conferences 94, 03008 (2017)
ET  - Vol. 94
ER  - 
TY  - CHAP
A1  - Goldmann, Jan-Peter
A1  - Braunstein, Bjoern
A1  - Heinrich, Kai
A1  - Sanno, Maximilian
A1  - Stäudle, Benjamin
A1  - Ritzdorf, Wolfgang
A1  - Brüggemann, Gert-Peter
A1  - Albracht, Kirsten
T1  - Joint work of the take-off leg during elite high jump
T2  - Proceedings of the 33th International Conference on Biomechanics in Sports (ISBS)
Y1  - 2015
ER  - 
TY  - CHAP
A1  - Droszez, Anna
A1  - Sanno, Maximilian
A1  - Goldmann, Jan-Peter
A1  - Albracht, Kirsten
A1  - Brüggemann, Gerd-Peter
A1  - Braunstein, Bjoern
T1  - Differences between take-off behavior during vertical jumps and two artistic elements
T2  - 34th International Conference of Biomechanics in Sport, Tsukuba, Japan, July 18-22, 2016
Y1  - 2016
SN  - 1999-4168
SP  - 577
EP  - 580
ER  - 
TY  - CHAP
A1  - Abel, Thomas
A1  - Bonin, Dominik
A1  - Albracht, Kirsten
A1  - Zeller, Sebastian
A1  - Brüggemann, Gert-Peter
A1  - Burkett, Brendan
A1  - Strüder, Heiko K.
T1  - Kinematic profile of the elite handcyclist
T2  - 28th  International Conference on Biomechanics in Sports, Marquette, Michigan, USA, July 19 – 23, 2010
Y1  - 2017
SN  - 1999-4168
SP  - 140
EP  - 141
ER  - 
TY  - CHAP
A1  - Braunstein, Bjoern
A1  - Goldmann, Jan-Peter
A1  - Albracht, Kirsten
A1  - Sanno, Maximilian
A1  - Willwacher, Steffen
A1  - Heinrich, Kai
A1  - Herrmann, Volker
A1  - Brüggemann, Gert-Peter
T1  - Joint specific contribution of mechanical power and work during acceleration and top speed in elite sprinters
T2  - 31 International Conference on Biomechanics in Sports, Taipei, Taiwan, July 07 - July 22, 2013
Y1  - 2013
SN  - 1999-4168
ER  - 
TY  - CHAP
A1  - Kolditz, Melanie
A1  - Albracht, Kirsten
A1  - Fasse, Alessandro
A1  - Albin, Thivaharan
A1  - Brüggemann, Gert-Peter
A1  - Abel, Dirk
T1  - Evaluation of an industrial robot as a leg press training device
T2  - XV International Symposium on Computer Simulation in Biomechanics July 9th – 11th 2015, Edinburgh, UK
Y1  - 2015
SP  - 41
EP  - 42
ER  - 
TY  - CHAP
A1  - Kolditz, Melanie
A1  - Albin, Thivaharan
A1  - Fasse, Alessandro
A1  - Brüggemann, Gert-Peter
A1  - Abel, Dirk
A1  - Albracht, Kirsten
T1  - Simulative Analysis of Joint Loading During Leg Press Exercise for Control Applications
T2  - IFAC-PapersOnLine
Y1  - 2015
U6  - https://doi.org/10.1016/j.ifacol.2015.10.179
N1  - IFAC-PapersOnLine 48-20;
Conference Paper Archive
VL  - 48
IS  - 20
SP  - 435
EP  - 440
ER  - 
TY  - CHAP
A1  - Schmidts, Oliver
A1  - Kraft, Bodo
A1  - Schreiber, Marc
A1  - Zündorf, Albert
T1  - Continuously evaluated research projects in collaborative decoupled environments
T2  - 2018 ACM/IEEE 5th International Workshop on Software Engineering Research and Industrial PracticePractice, May 29, 2018, Gothenburg, Sweden : SER&IP' 18
N2  - Often, research results from collaboration projects are not transferred into productive environments even though approaches are proven to work in demonstration prototypes. These demonstration prototypes are usually too fragile and error-prone to be transferred
easily into productive environments. A lot of additional work is required.
Inspired by the idea of an incremental delivery process, we introduce an architecture pattern, which combines the approach of Metrics Driven Research Collaboration with microservices for the ease of integration. It enables keeping track of project goals over the course of the collaboration while every party may focus on their expert skills: researchers may focus on complex algorithms,
practitioners may focus on their business goals.
Through the simplified integration (intermediate) research results can be introduced into a productive environment which enables
getting an early user feedback and allows for the early evaluation of different approaches. The practitioners’ business model benefits throughout the full project duration.
Y1  - 2018
SP  - 1
EP  - 9
PB  - ACM
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Behbahani, Mehdi
T1  - An Experimental Study of Thrombocyte Reactions in Response to Biomaterial Surfaces and Varying Shear Stress
T2  - Proceedings of the International Conference on Biomedical Engineering and Systems Prague, Czech Republic, August 14-15, 2014
Y1  - 2014
SP  - Paper 125
ER  - 
TY  - CHAP
A1  - Behbahani, Mehdi
A1  - Rible, Sebastian
A1  - Moulinec, Charles
A1  - Fournier, Yvan
A1  - Nicolai, Mike
A1  - Crosetto, Paolo
T1  - Simulation of the FDA Centrifugal Blood Pump Using High Performance Computing
T2  - World Academy of Science, Engineering and Technology International Journal of Mechanical and Mechatronics Engineering
Y1  - 2015
VL  - 9
IS  - 5
ER  - 
TY  - CHAP
A1  - Essingholt, Felix
A1  - Meyer, Frederic
A1  - Kuhn, Peter
A1  - Schmidt, Philip
A1  - Benkner, Thorsten
A1  - Grabmaier, Anton
T1  - Non-invasive heart beat measurement using microwave resonators
T2  - Proceedings, Vol. 2, Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018
Y1  - 2018
U6  - https://doi.org/10.3390/proceedings2131002
SN  - 2504-3900
SP  - 1002
PB  - MDPI
CY  - Basel
ER  - 
TY  - CHAP
A1  - Ayed, Anis Haj
A1  - Striegan, Constantin J. D.
A1  - Kusterer, Karsten
A1  - Funke, Harald
A1  - Kazari, M.
A1  - Horikawa, Atsushi
A1  - Okada, Kunio
T1  - Automated design space exploration of the hydrogen fueled "Micromix" combustor technology
N2  - Combined with the use of renewable energy sources for
its production, Hydrogen represents a possible alternative gas
turbine fuel for future low emission power generation. Due to
its different physical properties compared to other fuels such
as natural gas, well established gas turbine combustion
systems cannot be directly applied for Dry Low NOx (DLN)
Hydrogen combustion. This makes the development of new
combustion technologies an essential and challenging task
for the future of hydrogen fueled gas turbines.
The newly developed and successfully tested “DLN
Micromix” combustion technology offers a great potential to
burn hydrogen in gas turbines at very low NOx emissions.
Aiming to further develop an existing burner design in terms
of increased energy density, a redesign is required in order to
stabilise the flames at higher mass flows and to maintain low
emission levels.
For this purpose, a systematic design exploration has
been carried out with the support of CFD and optimisation
tools to identify the interactions of geometrical and design
parameters on the combustor performance. Aerodynamic
effects as well as flame and emission formation are observed
and understood time- and cost-efficiently. Correlations
between single geometric values, the pressure drop of the
burner and NOx production have been identified as a result.
This numeric methodology helps to reduce the effort of
manufacturing and testing to few designs for single
validation campaigns, in order to confirm the flame stability
and NOx emissions in a wider operating condition field.
Y1  - 2017
N1  - Proceedings of the 1st Global Power and Propulsion Forum
GPPF 2017, Jan 16-18, 2017, Zurich, Switzerland
SP  - 1
EP  - 8
ER  -