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  - Bornheim, Tobias
A1  - Grieger, Niklas
A1  - Bialonski, Stephan
T1  - FHAC at GermEval 2021: Identifying German toxic, engaging, and fact-claiming comments with ensemble learning
T2  - Proceedings of the GermEval 2021 Workshop on the Identification of Toxic, Engaging, and Fact-Claiming Comments : 17th Conference on Natural Language Processing KONVENS 2021
Y1  - 2021
U6  - https://doi.org/10.48415/2021/fhw5-x128
N1  - KONVENS (Konferenz zur Verarbeitung natürlicher Sprache/Conference on Natural Language Processing) 2021, 6. - 9. September 2021, Düsseldorf
SP  - 105
EP  - 111
PB  - Heinrich Heine University
CY  - Düsseldorf
ER  - 
TY  - CHAP
A1  - Pohle-Fröhlich, Regina
A1  - Dalitz, Christoph
A1  - Richter, Charlotte
A1  - Hahnen, Tobias
A1  - Stäudle, Benjamin
A1  - Albracht, Kirsten
T1  - Estimation of muscle fascicle orientation in ultrasonic images
T2  - Proceedings of the 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications - Volume 5
N2  - We compare four different algorithms for automatically estimating the muscle fascicle angle from ultrasonic images: the vesselness filter, the Radon transform, the projection profile method and the gray level cooccurence matrix (GLCM). The algorithm results are compared to ground truth data generated by three different experts on 425 image frames from two videos recorded during different types of motion. The best agreement with the ground truth data was achieved by a combination of pre-processing with a vesselness filter and measuring the angle with the projection profile method. The robustness of the estimation is increased by applying the algorithms to subregions with high gradients and performing a LOESS fit through these estimates.
Y1  - 2020
SN  - 978-989-758-402-2
U6  - https://doi.org/10.5220/0008933900790086
N1  - 15th International Joint Conference on Computer Vision, Imaging and Computer Graphics Theory and Applications VISAPP 2020, Valletta, Malta
SP  - 79
EP  - 86
PB  - SciTePress
CY  - Setúbal, Portugal
ER  - 
TY  - CHAP
A1  - Schmidts, Oliver
A1  - Kraft, Bodo
A1  - Winkens, Marvin
A1  - Zündorf, Albert
T1  - Catalog integration of low-quality product data by attribute label ranking
T2  - Proceedings of the 9th International Conference on Data Science, Technology and Applications DATA - Volume 1
N2  - The integration of product data from heterogeneous sources and manufacturers into a single catalog is often still a laborious, manual task. Especially small- and medium-sized enterprises face the challenge of timely integrating the data their business relies on to have an up-to-date product catalog, due to format specifications, low quality of data and the requirement of expert knowledge. Additionally, modern approaches to simplify catalog integration demand experience in machine learning, word vectorization, or semantic similarity that such enterprises do not have. Furthermore, most approaches struggle with low-quality data. We propose Attribute Label Ranking (ALR), an easy to understand and simple to adapt learning approach. ALR leverages a model trained on real-world integration data to identify the best possible schema mapping of previously unknown, proprietary, tabular format into a standardized catalog schema. Our approach predicts multiple labels for every attribute of an inpu t column. The whole column is taken into consideration to rank among these labels. We evaluate ALR regarding the correctness of predictions and compare the results on real-world data to state-of-the-art approaches. Additionally, we report findings during experiments and limitations of our approach.
Y1  - 2020
SN  - 978-989-758-440-4
U6  - https://doi.org/10.5220/0009831000900101
N1  - 9th International Conference on Data Science, Technologies and Applications (DATA 2020), 7 - 9 July 2020, online
SP  - 90
EP  - 101
PB  - SciTePress
CY  - Setúbal, Portugal
ER  - 
TY  - CHAP
A1  - Iomdina, Elena N.
A1  - Kiseleva, Anna A.
A1  - Kotliar, Konstantin
A1  - Luzhnov, Petr V.
T1  - Quantification of Choroidal Blood Flow Using the OCT-A System Based on Voxel Scan Processing
T2  - Proceedings of the International Conference on Biomedical Innovations and Applications- BIA 2020
N2  - The paper presents a method for the quantitative assessment of choroidal blood flow using an OCT-A system. The developed technique for processing of OCT-A scans is divided into two stages. At the first stage, the identification of the boundaries in the selected portion was performed. At the second stage, each pixel mark on the selected layer was represented as a volume unit, a voxel, which characterizes the region of moving blood. Three geometric shapes were considered to represent the voxel. On the example of one OCT-A scan, this work presents a quantitative assessment of the blood flow index. A possible modification of two-stage algorithm based on voxel scan processing is presented.
Y1  - 2020
SN  - 978-1-7281-7073-2
U6  - https://doi.org/10.1109/BIA50171.2020.9244511
N1  - International Conference on Biomedical Innovations and Applications, Varna, Bulgaria, September 24 - 27, 2020
SP  - 41
EP  - 44
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Sildatke, Michael
A1  - Karwanni, Hendrik
A1  - Kraft, Bodo
A1  - Schmidts, Oliver
A1  - Zündorf, Albert
T1  - Automated Software Quality Monitoring in Research Collaboration Projects
T2  - ICSEW'20: Proceedings of the IEEE/ACM 42nd International Conference on Software Engineering Workshops
N2  - In collaborative research projects, both researchers and practitioners work together solving business-critical challenges. These projects often deal with ETL processes, in which humans extract information from non-machine-readable documents by hand. AI-based machine learning models can help to solve this problem.

Since machine learning approaches are not deterministic, their quality of output may decrease over time. This fact leads to an overall quality loss of the application which embeds machine learning models. Hence, the software qualities in development and production may differ.

Machine learning models are black boxes. That makes practitioners skeptical and increases the inhibition threshold for early productive use of research prototypes. Continuous monitoring of software quality in production offers an early response capability on quality loss and encourages the use of machine learning approaches. Furthermore, experts have to ensure that they integrate possible new inputs into the model training as quickly as possible.

In this paper, we introduce an architecture pattern with a reference implementation that extends the concept of Metrics Driven Research Collaboration with an automated software quality monitoring in productive use and a possibility to auto-generate new test data coming from processed documents in production.

Through automated monitoring of the software quality and auto-generated test data, this approach ensures that the software quality meets and keeps requested thresholds in productive use, even during further continuous deployment and changing input data.
Y1  - 2020
U6  - https://doi.org/10.1145/3387940.3391478
N1  - ICSE '20: 42nd International Conference on Software Engineering, Seoul, Republic of Korea, 27 June 2020 - 19 July 2020
SP  - 603
EP  - 610
PB  - IEEE
CY  - New York, NY
ER  - 
TY  - CHAP
A1  - Schmidts, Oliver
A1  - Kraft, Bodo
A1  - Siebigteroth, Ines
A1  - Zündorf, Albert
T1  - Schema Matching with Frequent Changes on Semi-Structured Input Files: A Machine Learning Approach on Biological Product Data
T2  - Proceedings of the 21st International Conference on Enterprise Information Systems - Volume 1: ICEIS
Y1  - 2019
SN  - 978-989-758-372-8
U6  - https://doi.org/10.5220/0007723602080215
SP  - 208
EP  - 215
ER  - 
TY  - CHAP
A1  - Hingley, Peter
A1  - Dikta, Gerhard
T1  - Finding a well performing box-jenkins forecasting model for annualised patent filings counts
T2  - International Symposium on Forecasting, Thessaloniki, Greece, June 2019
Y1  - 2019
ER  - 
TY  - CHAP
A1  - Siebigteroth, Ines
A1  - Kraft, Bodo
A1  - Schmidts, Oliver
A1  - Zündorf, Albert
T1  - A Study on Improving Corpus Creation by Pair Annotation
T2  - Proceedings of the Poster Session of the 2nd Conference on Language, Data and Knowledge (LDK-PS 2019)
Y1  - 2019
SN  - 1613-0073
SP  - 40
EP  - 44
ER  - 
TY  - CHAP
A1  - Ketelhut, Maike
A1  - Göll, Fabian
A1  - Braunstein, Bjoern
A1  - Albracht, Kirsten
A1  - Abel, Dirk
T1  - Iterative learning control of an industrial robot for neuromuscular training
T2  - 2019 IEEE Conference on Control Technology and Applications
N2  - Effective training requires high muscle forces potentially leading to training-induced injuries. Thus, continuous monitoring and controlling of the loadings applied to the musculoskeletal system along the motion trajectory is required. In this paper, a norm-optimal iterative learning control algorithm for the robot-assisted training is developed. The algorithm aims at minimizing the external knee joint moment, which is commonly used to quantify the loading of the medial compartment. To estimate the external knee joint moment, a musculoskeletal lower extremity model is implemented in OpenSim and coupled with a model of an industrial robot and a force plate mounted at its end-effector. The algorithm is tested in simulation for patients with varus, normal and valgus alignment of the knee. The results show that the algorithm is able to minimize the external knee joint moment in all three cases and converges after less than seven iterations.
KW  - Knee
KW  - Training
KW  - Load modeling
KW  - Force
KW  - Iterative learning control
Y1  - 2019
SN  - 978-1-7281-2767-5 (ePub)
SN  - 978-1-7281-2766-8 (USB)
SN  - 978-1-7281-2768-2 (PoD)
U6  - https://doi.org/10.1109/CCTA.2019.8920659
N1  - 2019 IEEE Conference on Control Technology and Applications (CCTA) Hong Kong, China, August 19-21, 2019
PB  - IEEE
CY  - New York
ER  - 
TY  - CHAP
A1  - Hunker, Jan
A1  - Jung, Alexander
A1  - Goßmann, Matthias
A1  - Linder, Peter
A1  - Staat, Manfred
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Development of a tool to analyze the conduction speed in microelectrode array measurements of cardiac tissue
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH Aachen
N2  - The discovery of human induced pluripotent stem cells reprogrammed from somatic cells [1] and their ability to differentiate into cardiomyocytes (hiPSC-CMs) has provided a robust platform for drug screening [2]. Drug screenings are essential in the development of new components, particularly for evaluating the potential of drugs to induce life-threatening pro-arrhythmias. Between 1988 and 2009, 14 drugs have been removed from the market for this reason [3]. The microelectrode array (MEA) technique is a robust tool for drug screening as it detects the field potentials (FPs) for the entire cell culture. Furthermore, the propagation of the field potential can be examined on an electrode basis. To analyze MEA measurements in detail, we have developed an open-source tool.
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 7
EP  - 8
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Azar, Fouad
A1  - Digel, Ilya
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Utilization of fluorescence spectroscopy and neural networks in clinical analysis
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH Aachen
N2  - Fluorescence topography of human urine in combination with learning algorithms can provide a variant pattern recognition method in analytical clinical chemistry and, eventually, diagnosis.
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 40
EP  - 41
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Raman, Aravind Hariharan
A1  - Jung, Alexander
A1  - Horváth, András
A1  - Becker, Nadine
A1  - Staat, Manfred
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Modification of a computer model of human stem cell-derived cardiomyocyte electrophysiology based on Patch-Clamp measurements
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH Aachen
N2  - Human induced pluripotent stem cells (hiPSCs) have shown to be promising in disease studies and drug screenings [1]. Cardiomyocytes derived from hiPSCs have been extensively investigated using patch-clamping and optical methods to compare their electromechanical behaviour relative to fully matured adult cells. Mathematical models can be used for translating findings on hiPSCCMs to adult cells [2] or to better understand the mechanisms of various ion channels when a drug is applied [3,4]. Paci et al. (2013) [3] developed the first model of hiPSC-CMs, which they later refined based on new data [3]. The model is based on iCells® (Fujifilm Cellular Dynamics, Inc. (FCDI), Madison WI, USA) but major differences among several cell lines and even within a single cell line have been found and motivate an approach for creating sample-specific models. We have developed an optimisation algorithm that parameterises the conductances (in S/F=Siemens/Farad) of the latest Paci et al. model (2018) [5] using current-voltage data obtained in individual patch-clamp experiments derived from an automated patch clamp system (Patchliner, Nanion Technologies GmbH, Munich).
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 10
EP  - 11
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Bayer, Robin
A1  - Hescheler, Jürgen
A1  - Artmann, Gerhard
A1  - Temiz Artmann, Aysegül
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Treating arterial hypertension in a cell culture well
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH AachenW
N2  - Hypertension describes the pathological increase of blood pressure, which is most commonly associated with the increase of vascular wall stiffness [1]. Referring to the “Deutsche Bluthochdruck Liga” this pathology shows a growing trend in our aging society. In order to find novel pharmacological and probably personalized treatments, we want to present a functional approach to study biomechanical properties of a human aortic vascular model.
In this method review we will give an overview of recent studies which were carried out with the CellDrum technology [2] and underline the added value to already existing standard procedures known from the field of physiology.
Herein described CellDrum technology is a system to measure functional mechanical properties of cell monolayers and thin tissue constructs in-vitro. Additionally, the CellDrum enables to elucidate the mechanical response of cells to pharmacological drugs, toxins and vasoactive agents. Due to its highly flexible polymer support, cells can also be mechanically stimulated by steady and cyclic biaxial stretching.
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 5
EP  - 6
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Blum, Yannik
A1  - Albanna, Walid
A1  - Benninghaus, Anne
A1  - Kotliar, Konstantin
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Vasomotion in retinal vessels of patients presenting post hemorrhagic hydrocephalus following subarachnoid hemorrhage
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH Aachen
N2  - Clearance of blood components and fluid drainage play a crucial role in subarachnoid hemorrhage (SAH) and post hemorrhagic hydrocephalus (PHH). With the involvement of interstitial fluid (ISF) and cerebrospinal fluid (CSF), two pathways for the clearance of fluid and solutes in the brain are proposed. Starting at the level of capillaries, flow of ISF follows along the basement membranes in the walls of cerebral arteries out of the parenchyma to drain into the lymphatics and CSF [1]–[3]. Conversely, it is shown that CSF enters the parenchyma between glial and pial basement membranes of penetrating arteries [4]–[6]. Nevertheless, the involved structures and the contribution of either flow pathway to fluid balance between the subarachnoid space and interstitial space remains controversial. Low frequency oscillations in vascular tone are referred to as vasomotion and corresponding vasomotion waves are modeled as the driving force for flow of ISF out of the parenchyma [7]. Retinal vessel analysis (RVA) allows non-invasive measurement of retinal vessel vasomotion with respect to diameter changes [8]. Thus, the aim of the study is to investigate vasomotion in RVA signals of SAH and PHH patients.
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 38
EP  - 39
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Zingsheim, Jonas
A1  - Grimmer, Timo
A1  - Ortner, Marion
A1  - Schmaderer, Christoph
A1  - Hauser, Christine
A1  - Kotliar, Konstantin
ED  - Staat, Manfred
ED  - Erni, Daniel
T1  - Recognition of subjects with mild cognitive impairment (MCI) by the use of retinal arterial vessels.
T2  - 3rd YRA MedTech Symposium 2019 : May 24 / 2019 / FH Aachen
Y1  - 2019
SN  - 978-3-940402-22-6
U6  - https://doi.org/10.17185/duepublico/48750
SP  - 36
EP  - 37
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Bhattarai, Aroj
A1  - Staat, Manfred
ED  - Fernandes, P.R.
ED  - Tavares, J. M.
T1  - Pectopexy to repair vaginal vault prolapse: a finite element approach
T2  - Proceedings CMBBE 2018
N2  - The vaginal prolapse after hysterectomy (removal of the uterus) is often associated with the prolapse of the vaginal vault, rectum, bladder, urethra or small bowel. Minimally
invasive surgery such as laparoscopic sacrocolpopexy and pectopexy are widely performed for the treatment of the vaginal prolapse with weakly supported vaginal vault after hysterectomy using prosthetic mesh implants to support (or strengthen) lax apical ligaments. Implants of different shape, size and polymers are selected depending on the patient’s anatomy and the surgeon’s preference. In this computational study on pectopexy, DynaMesh®-PRP soft, GYNECARE GYNEMESH® PS Nonabsorbable PROLENE® soft and Ultrapro® are tested in a 3D finite element model of the female pelvic floor. The mesh model is implanted into the extraperitoneal space and sutured to the vaginal stump with a bilateral fixation to the iliopectineal ligament at both sides. Numerical simulations are conducted at rest, after surgery and during Valsalva maneuver with weakened tissues modeled by reduced tissue stiffness. Tissues and prosthetic meshes are modeled as incompressible, isotropic hyperelastic materials. The positions of the organs are calculated with respect to the pubococcygeal line (PCL) for female pelvic floor at rest, after repair and during Valsalva maneuver using the three meshes.
Y1  - 2018
N1  - 15th International Symposium on Computer Methods in Biomechanics and Biomedical Engineering and 3rd Conference on Imaging and Visualization. CMBBE 2018. 26-29 March 2018, Lisbon, Portugal
ER  - 
TY  - CHAP
A1  - Schreiber, Marc
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - NLP Lean Programming Framework: Developing NLP Applications More Effectively
T2  - Proceedings of NAACL-HLT 2018: Demonstrations, New Orleans, Louisiana, June 2 - 4, 2018
N2  - This paper presents NLP Lean Programming
framework (NLPf), a new framework
for creating custom natural language processing
(NLP) models and pipelines by utilizing
common software development build systems.
This approach allows developers to train and
integrate domain-specific NLP pipelines into
their applications seamlessly. Additionally,
NLPf provides an annotation tool which improves
the annotation process significantly by
providing a well-designed GUI and sophisticated
way of using input devices. Due to
NLPf’s properties developers and domain experts
are able to build domain-specific NLP
applications more efficiently. NLPf is Opensource
software and available at https://
gitlab.com/schrieveslaach/NLPf.
Y1  - 2018
U6  - https://doi.org/10.18653/v1/N18-5001 
ER  - 
TY  - CHAP
A1  - Krome, Cornelia
A1  - Sander, Volker
T1  - Time series analysis with apache spark and its applications to energy informatics
T2  - Proceedings of the 7th DACH+ Conference on Energy Informatics
N2  - In energy economy forecasts of different time series are rudimentary. In this study, a prediction for the German day-ahead spot market is created with Apache Spark and R. It is just an example for many different applications in virtual power plant environments. Other examples of use as intraday price processes, load processes of machines or electric vehicles, real time energy loads of photovoltaic systems and many more time series need to be analysed and predicted.

This work gives a short introduction into the project where this study is settled. It describes the time series methods that are used in energy industry for forecasts shortly. As programming technique Apache Spark, which is a strong cluster computing technology, is utilised. Today, single time series can be predicted. The focus of this work is on developing a method to parallel forecasting, to process multiple time series simultaneously with R and Apache Spark.
Y1  - 2018
U6  - https://doi.org/10.1186/s42162-018-0043-1
N1  - Energy Informatics 2018, Volume 1 Supplement 1
ER  - 
TY  - CHAP
A1  - Tran, Ngoc Trinh
A1  - Matthies, Hermann G.
A1  - Stavroulakis, Georgios Eleftherios
A1  - Staat, Manfred
T1  - Direct plastic structural design by chance constrained programming
T2  - 6th European Conference on Computational Mechanics (ECCM 6), 7th European Conference on Computational Fluid Dynamics (ECFD 7), 11-15 June 2018, Glasgow, UK
N2  - We propose a stochastic programming method to analyse limit and shakedown of structures under random strength with lognormal distribution. In this investigation a dual chance constrained programming algorithm is developed to calculate simultaneously both the upper and lower bounds of the plastic collapse limit or the shakedown limit. The edge-based smoothed finite element method (ES-FEM) using three-node linear triangular elements is used.
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Jung, Alexander
A1  - Frotscher, Ralf
A1  - Staat, Manfred
T1  - Electromechanical model of hiPSC-derived ventricular cardiomyocytes cocultured with fibroblasts
T2  - 6th European Conference on Computational Mechanics (ECCM 6), 7th European Conference on Computational Fluid Dynamics (ECFD 7), 11-15 June 2018, Glasgow, UK
N2  - The CellDrum provides an experimental setup to study the mechanical effects of fibroblasts co-cultured with hiPSC-derived ventricular cardiomyocytes. Multi-scale computational models based on the Finite Element Method are developed. Coupled electrical cardiomyocyte-fibroblast models (cell level) are embedded into reaction-diffusion equations (tissue level) which compute the propagation of the action potential in the cardiac tissue. Electromechanical coupling is realised by an excitation-contraction model (cell level) and the active stress arising during contraction is added to the passive stress in the force balance, which determines the tissue displacement (tissue level). Tissue parameters in the model can be identified experimentally to the specific sample.
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Kahmann, Stephanie Lucina
A1  - Uschok, Stephan
A1  - Wegmann, Kilian
A1  - Müller, Lars-P.
A1  - Staat, Manfred
T1  - Biomechanical multibody model with refined kinematics of the elbow
T2  - 6th European Conference on Computational Mechanics (ECCM 6), 7th European Conference on Computational Fluid Dynamics (ECFD 7), 11-15 June 2018, Glasgow, UK
N2  - The overall objective of this study is to develop a new external fixator, which closely maps the native kinematics of the elbow to decrease the joint force resulting in reduced rehabilitation time and pain. An experimental setup was designed to determine the native kinematics of the elbow during flexion of cadaveric arms. As a preliminary study, data from literature was used to modify a published biomechanical model for the calculation of the joint and muscle forces. They were compared to the original model and the effect of the kinematic refinement was evaluated. Furthermore, the obtained muscle forces were determined in order to apply them in the experimental setup. The joint forces in the modified model differed slightly from the forces in the original model. The muscle force curves changed particularly for small flexion angles but their magnitude for larger angles was consistent.
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Richter, Charlotte
A1  - Braunstein, Bjoern
A1  - Stäudle, Benjamin
A1  - Attias, Julia
A1  - Suess, Alexander
A1  - Weber, T.
A1  - Rittweger, Joern
A1  - Green, David A.
A1  - Albracht, Kirsten
T1  - In vivo fascicle length of the gastrocnemius muscle during walking in simulated martian gravity using two different body weight support devices
T2  - 23rd Annual Congress of the European College of Sport Science, Dublin, Irland
Y1  - 2018
ER  - 
TY  - CHAP
A1  - Schreiber, Marc
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - Metrics Driven Research Collaboration: Focusing on Common Project Goals Continuously
T2  - 39th International Conference on Software Engineering, May 20-28, 2017 - Buenos Aires, Argentina
N2  - Research collaborations provide opportunities for both practitioners and researchers: practitioners need solutions for difficult business challenges and researchers are looking for hard problems to solve and publish. Nevertheless, research collaborations carry the risk that practitioners focus on quick solutions too much and that researchers tackle theoretical problems, resulting in products which do not fulfill the project requirements.
In this paper we introduce an approach extending the ideas of agile and lean software development. It helps practitioners and researchers keep track of their common research collaboration goal: a scientifically enriched software product which fulfills the needs of the practitioner’s business model.
This approach gives first-class status to application-oriented metrics that measure progress and success of a research collaboration continuously. Those metrics are derived from the collaboration requirements and help to focus on a commonly defined goal.
An appropriate tool set evaluates and visualizes those metrics with minimal effort, and all participants will be pushed to focus on their tasks with appropriate effort. Thus project status, challenges and progress are transparent to all research collaboration members at any time.
Y1  - 2017
N1  - Software Engineering in Practice (SEIP).
ICSE2017
Vorabversion der Autoren
ER  - 
TY  - CHAP
A1  - Schmidts, Oliver
A1  - Boltes, Maik
A1  - Kraft, Bodo
A1  - Schreiber, Marc
T1  - Multi-pedestrian tracking by moving Bluetooth-LE beacons and stationary receivers
T2  - 2017 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 18-21 September 2017, Sapporo, Japan
Y1  - 2017
N1  - International Conference on Indoor Positioning and Indoor Navigation <8, 2017, Sapporo, Japan>
SP  - 1
EP  - 4
ER  - 
TY  - CHAP
A1  - Miyamoto, Ko-ichiro
A1  - Suto, Takeyuki
A1  - Werner, Frederik
A1  - Wagner, Torsten
A1  - Schöning, Michael Josef
A1  - Yoshinobu, Tatsuo
T1  - Restraining the Diffusion of Photocarriers to Improve the Spatial Resolution of the Chemical Imaging Sensor
T2  - MDPI Proceedings
Y1  - 2017
U6  - https://doi.org/10.3390/proceedings1040477
N1  - Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
VL  - 1
IS  - 4
ER  - 
TY  - CHAP
A1  - Oberländer, Jan
A1  - Arreola, Julio
A1  - Hansen, Christina
A1  - Greeff, Anton
A1  - Mayer, Marlena
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Impedimetric Biosensor to Enable Fast Evaluation of Gaseous Sterilization Processes
T2  - MDPI Proceedings
Y1  - 2017
U6  - https://doi.org/10.3390/proceedings1040435
N1  - Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
VL  - 1
IS  - 4
ER  - 
TY  - CHAP
A1  - Breuer, Lars
A1  - Guthmann, Eric
A1  - Schöning, Michael Josef
A1  - Thoelen, Ronald
A1  - Wagner, Torsten
T1  - Light-Stimulated Hydrogels with Incorporated Graphene Oxide as Actuator Material for Flow Control in Microfluidic Applications
T2  - Proceedings Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
Y1  - 2017
U6  - https://doi.org/10.3390/proceedings1040524
SP  - 1
EP  - 4
ER  - 
TY  - CHAP
A1  - Jablonski, Melanie
A1  - Koch, Claudia
A1  - Bronder, Thomas
A1  - Poghossian, Arshak
A1  - Wege, Christina
A1  - Schöning, Michael Josef
T1  - Field-Effect Biosensors Modified with Tobacco Mosaic Virus Nanotubes as Enzyme Nanocarrier
T2  - MDPI Proceeding
Y1  - 2017
U6  - https://doi.org/10.3390/proceedings1040505
N1  - Eurosensors 2017 Conference, Paris, France, 3–6 September 2017
VL  - 1
IS  - 4
ER  - 
TY  - CHAP
A1  - Molinnus, Denise
A1  - Hardt, Gabriel
A1  - Käver, Larissa
A1  - Willenberg, Holger S.
A1  - Poghossian, Arshak
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Detection of Adrenaline Based on Bioelectrocatalytical System to Support Tumor Diagnostic Technology
T2  - MDPI Proceedings
Y1  - 2017
U6  - https://doi.org/10.3390/proceedings1040506
ER  - 
TY  - CHAP
A1  - Jabbari, Medisa
A1  - Bhattarai, Aroj
A1  - Anding, Ralf
A1  - Staat, Manfred
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Biomechanical simulation of different prosthetic meshes for repairing uterine/vaginal vault prolapse
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 118
EP  - 119
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Kuhlen, Max
A1  - Digel, Ilya
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Fluorescence signatures and detection limits of ubiquitous terrestrial bio-compounds
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 102
EP  - 103
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - de Honde, Lukas
A1  - Porst, Dariusz
A1  - Digel, Ilya
ED  - Fischerauer, Alice
T1  - A randomized, observational thermographic study of the neck region before and after a physiotherapeutic intervention
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 122
EP  - 123
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Abel, Alexander
A1  - Pérez-Viana, Daniel
A1  - Ciritsis, Bernard
A1  - Staat, Manfred
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Prevention of femur neck fractures through femoroplasty
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 114
EP  - 115
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Suryoputri, Nathania
A1  - Ghaderi, Aydin
A1  - Linder, Peter
A1  - Kotliar, Konstantin
A1  - Göttler, Jens
A1  - Sorg, Christian
A1  - Grimmer, Timo
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Does hemodynamic response function change in Alzheimer disease?
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 92
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Schreiber, Marc
A1  - Kraft, Bodo
A1  - Zündorf, Albert
ED  - Bilof, Randall
T1  - Metrics driven research collaboration: focusing on common project goals continuously
T2  - Proceedings : 2017 IEEE/ACM 4th International Workshop on Software Engineering Research and Industrial Practice : SER&IP 2017 : 21 May 2017 Buenos Aires, Argentina
Y1  - 2017
SN  - 978-1-5386-2797-6
U6  - https://doi.org/10.1109/SER-IP.2017..6
SP  - 41
EP  - 47
PB  - IEEE Press
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Schlemmer, Katharina
A1  - Porst, Dariusz
A1  - Bassam, Rasha
A1  - Artmann, Gerhard
A1  - Digel, Ilya
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Effects of nitric oxide (NO) and ATP on red blood cell phenotype and deformability
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 100
EP  - 101
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Schneider, Oliver
A1  - Al Hakim, Taher
A1  - Kayser, Peter
A1  - Digel, Ilya
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Development and trials of a test chamber for ultrasound-assisted sampling of living cells from solid surfaces
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
SP  - 96
EP  - 97
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Birgel, Stefan
A1  - Leschinger, Tim
A1  - Wegmann, Kilian
A1  - Staat, Manfred
ED  - Erni, Daniel
ED  - Fischerauer, Alice
ED  - Himmel, Jörg
ED  - Seeger, Thomas
ED  - Thelen, Klaus
T1  - Calculation of muscle forces and joint reaction loads in shoulder area via an OpenSim based computer calculation
T2  - 2nd YRA MedTech Symposium 2017 : June 8th - 9th / 2017 / Hochschule Ruhr-West
Y1  - 2017
SN  - 978-3-9814801-9-1
U6  - https://doi.org/10.17185/duepublico/43984
N1  - A young researchers track of the 7th IEEE Workshop & SENSORICA 2017
N1  - In der Druckausgabe des Abstractbandes ist dieser Beitrag lose als Erratum beigefügt.
SP  - 116
EP  - 117
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Schreiber, Marc
A1  - Kraft, Bodo
A1  - Zündorf, Albert
T1  - Cost-efficient quality assurance of natural language processing tools through continuous monitoring with continuous integration
T2  - 3rd International Workshop on Software Engineering Research and Industrial Practice
Y1  - 2016
U6  - https://doi.org/10.1145/2897022.2897029
N1  - SER&IP’16, May 17 2016, Austin, TX, USA
SP  - 46
EP  - 52
ER  - 
TY  - CHAP
A1  - Bhattarai, Aroj
A1  - Frotscher, Ralf
A1  - Staat, Manfred
ED  - Natal Jorge, Renato
T1  - Significance of fibre geometry on passive-active response of pelvic muscles to evaluate pelvic dysfunction
T2  - BioMedWomen: Proceedings of the international conference on clinical and bioengineering for women's health
Y1  - 2016
SN  - 978-1-138-02910-1
SP  - 185
EP  - 188
PB  - CRC Press
CY  - Boca Raton
ER  - 
TY  - CHAP
A1  - Jung, Alexander
A1  - Staat, Manfred
ED  - Erni, Daniel
T1  - Computing olympic gold: Ski jumping as an example
T2  - 1st YRA MedTech Symposium 2016 : April 8th / 2016 / University of Duisburg-Essen
Y1  - 2016
SN  - 978-3-940402-06-6
U6  - https://doi.org/10.17185/duepublico/40821
SP  - 54
EP  - 55
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Duong, Minh Tuan
A1  - Jung, Alexander
A1  - Frotscher, Ralf
A1  - Staat, Manfred
ED  - Papadrakakis, M.
T1  - A 3D electromechanical FEM-based model for cardiac tissue
T2  - ECCOMAS Congress 2016, VII European Congress on Computational Methods in Applied Sciences and Engineering. Crete Island, Greece, 5–10 June 2016
Y1  - 2016
N1  - revised after the conference
P11367
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  - Bäcker, Matthias
A1  - Koch, C.
A1  - Geiger, F.
A1  - Eber, F.
A1  - Gliemann, H.
A1  - Poghossian, Arshak
A1  - Schöning, Michael Josef
T1  - A New Class of Biosensors Based on Tobacco Mosaic Virus and Coat Proteins as Enzyme Nanocarrier
T2  - Procedia Engineering
Y1  - 2016
U6  - https://doi.org/10.1016/j.proeng.2016.11.228
SN  - 1877-7058
N1  - Proceedings of the 30th anniversary Eurosensors Conference – Eurosensors 2016, 4-7. Sepember 2016, Budapest, Hungary
VL  - Vol. 168
SP  - 618
EP  - 621
ER  - 
TY  - CHAP
A1  - Tran, Ngoc Trinh
A1  - Tran, Thanh Ngoc
A1  - Matthies, H. G.
A1  - Stavroulakis, G. E.
A1  - Staat, Manfred
ED  - Papadrakakis, M.
T1  - Shakedown analysis of plate bending analysis under stochastic uncertainty by chance constrained programming
T2  - ECCOMAS Congress 2016, VII European Congress on Computational Methods in Applied Sciences and Engineering. Crete Island, Greece, 5–10 June 2016
Y1  - 2016
ER  - 
TY  - CHAP
A1  - Poghossian, Arshak
A1  - Bronder, Thomas
A1  - Scheja, S.
A1  - Wu, Chunsheng
A1  - Metzger-Boddien, C.
A1  - Keusgen, M.
A1  - Schöning, Michael Josef
T1  - Label-free Electrostatic Detection of DNA Amplification by PCR Using Capacitive Field-effect Devices
T2  - Procedia Engineering
N2  - A capacitive field-effect EIS (electrolyte-insulator-semiconductor) sensor modified with a positively charged weak polyelectrolyte of poly(allylamine hydrochloride) (PAH)/single-stranded probe DNA (ssDNA) bilayer has been used for a label-free electrostatic detection of pathogen-specific DNA amplification via polymerase chain reaction (PCR). The sensor is able to distinguish between positive and negative PCR solutions, to detect the existence of target DNA amplicons in PCR samples and thus, can be used as tool for a quick verification of DNA amplification and the successful PCR process.
Y1  - 2016
U6  - https://doi.org/10.1016/j.proeng.2016.11.512
SN  - 1877-7058
N1  - Proceedings of the 30th anniversary Eurosensors Conference – Eurosensors 2016, 4-7. Sepember 2016, Budapest, Hungary
VL  - Vol. 168
SP  - 514
EP  - 517
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - CHAP
A1  - Bhattarai, Aroj
A1  - Staat, Manfred
ED  - Erni, Daniel
T1  - Female pelvic floor dysfunction: progress weakening of the support system
T2  - 1st YRA MedTech Symposium 2016 : April 8th / 2016 / University of Duisburg-Essen
N2  - The structure of the female pelvic floor (PF) is an inter-related system of bony pelvis,muscles, pelvic organs, fascias, ligaments, and nerves with multiple functions. Mechanically, thepelvic organ support system are of two types: (I) supporting system of the levator ani (LA) muscle,and (II) the suspension system of the endopelvic fascia condensation [1], [2]. Significantdenervation injury to the pelvic musculature, depolimerization of the collagen fibrils of the softvaginal hammock, cervical ring and ligaments during pregnancy and vaginal delivery weakens thenormal functions of the pelvic floor. Pelvic organ prolapse, incontinence, sexual dysfunction aresome of the dysfunctions which increases progressively with age and menopause due toweakened support system according to the Integral theory [3]. An improved 3D finite elementmodel of the female pelvic floor as shown in Fig. 1 is constructed that: (I) considers the realisticsupport of the organs to the pelvic side walls, (II) employs the improvement of our previous FEmodel [4], [5] along with the patient based geometries, (III) incorporates the realistic anatomy andboundary conditions of the endopelvic (pubocervical and rectovaginal) fascia, and (IV) considersvarying stiffness of the endopelvic fascia in the craniocaudal direction [3]. Several computationsare carried out on the presented computational model with healthy and damaged supportingtissues, and comparisons are made to understand the physiopathology of the female PF disorders.
Y1  - 2016
U6  - https://doi.org/10.17185/duepublico/40821
SP  - 11
EP  - 12
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  - 
TY  - CHAP
A1  - Kahmann, Stephanie
A1  - Hackl, Michael
A1  - Wegmann, Kilian
A1  - Müller, Lars-Peter
A1  - Staat, Manfred
ED  - Erni, Daniel
T1  - Impact of a proximal radial shortening osteotomy on the distribution of forces and the stability of the elbow
T2  - 1st YRA MedTech Symposium 2016 : April 8th / 2016 / University of Duisburg-Essen
N2  - The human arm consists of the humerus (upper arm), the medial ulna and the lateral radius (forearm). The joint between the humerus and the ulna is called humeroulnar joint and the joint between the humerus and the radius is called humeroradial joint. Lateral and medial collateral ligaments stabilize the elbow. Statistically, 2.5 out of 10,000 people suffer from radial head fractures [1]. In these fractures the cartilage is often affected. Caused by the injured cartilage, degenerative diseases like posttraumatic arthrosis may occur. The resulting pain and reduced range of motion have an impact on the patient’s quality of life. Until now, there has not been a treatment which allows typical loads in daily life activities and offers good long-term results. A new surgical approach was developed with the motivation to reduce the progress of the posttraumatic arthrosis. Here, the radius is shortened by 3 mm in the proximal part [2]. By this means, the load of the radius is intended to be reduced due to a load shift to the ulna. Since the radius is the most important stabilizer of the elbow it has to be confirmed that the stability is not affected. In the first test (Fig. 1 left), pressure distributions within the humeroulnar and humeroradial joints a native and a shortened radius were measured using resistive pressure sensors (I5076 and I5027, Tekscan, USA). The humerus was loaded axially in a tension testing machine (Z010, Zwick Roell, Germany) in 50 N steps up to 400 N. From the humerus the load is transmitted through both the radius and the ulna into the hand which is fixed on the ground. In the second test (Fig. 1 right), the joint stability was investigated using a digital image correlation system to measure the displacement of the ulna. Here, the humerus is fixed with a desired flexion angle and the unconstrained forearm lies on the ground. A rope connects the load actuator with a hook fixed in the ulna. A guide roller is used so that the rope pulls the ulna horizontally when a tensile load is applied. This creates a moment about the elbow joint with a maximum value of 7.5 Nm. Measurements were performed with varying flexion angles (0°, 30°, 60°, 90°, 120°). For both tests and each measurement, seven specimens were used. Student ́s t-test was employed to determine whether the mean values of the measurements in native specimen and operated specimens differ significantly.
Y1  - 2016
U6  - https://doi.org/10.17185/duepublico/40821
SP  - 7
EP  - 8
PB  - Universität Duisburg-Essen
CY  - Duisburg
ER  -