TY  - JOUR
A1  - Ndoumbè Mbonjo Mbonjo, H.
A1  - Streckert, J.
A1  - Bitz, Andreas
A1  - Hansen, V.
A1  - Glasmachers, A.
A1  - Gencol, S.
A1  - Rozic, D.
T1  - Generic UMTS test signal for RF bioelectromagnetic studies
JF  - Bioelectromagnetics
Y1  - 2004
U6  - http://dx.doi.org/10.1002/bem.20007
SN  - 1521-186X
VL  - 25
IS  - 6
SP  - 415
EP  - 425
ER  - 
TY  - CHAP
A1  - Nees, Franz
A1  - Stengel, Ingo
A1  - Meister, Vera G.
A1  - Barton, Thomas
A1  - Herrmann, Frank
A1  - Müller, Christian
A1  - Wolf, Martin
T1  - Angewandte Forschung in der Wirtschaftsinformatik 2020 : Tagungsband zur 33. AKWI-Jahrestagung am 14.09.2020, ausgerichtet von der Hochschule Karlsruhe - Wirtschaft und Technik / hrsg. von Franz Nees, Ingo Stengel, Vera G. Meister, Thomas Barton, Frank Herrmann, Christian Müller, Martin R. Wolf
N2  - Tagungsbeiträge aus den Bereichen KI, Prozessorganisation und Plattformen für Geschäftsprozesse, Sicherheit und Datenschutz sowie Prototypen und Modelle.
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:526-opus4-13840
SN  - 978-3-944330-66-2
PB  - mana-Buch
CY  - Heide
ER  - 
TY  - CHAP
A1  - Neth, Jannik
A1  - Schuba, Marko
A1  - Brodkorb, Karsten
A1  - Neugebauer, Georg
A1  - Höner, Tim
A1  - Hack, Sacha
T1  - Digital forensics triage app for android
T2  - ARES '23: Proceedings of the 18th International Conference on Availability, Reliability and Security
N2  - Digital forensics of smartphones is of utmost importance in many criminal cases. As modern smartphones store chats, photos, videos etc. that can be relevant for investigations and as they can have storage capacities of hundreds of gigabytes, they are a primary target for forensic investigators. However, it is exactly this large amount of data that is causing problems: extracting and examining the data from multiple phones seized in the context of a case is taking more and more time. This bears the risk of wasting a lot of time with irrelevant phones while there is not enough time left to analyze a phone which is worth examination. Forensic triage can help in this case: Such a triage is a preselection step based on a subset of data and is performed before fully extracting all the data from the smartphone. Triage can accelerate subsequent investigations and is especially useful in cases where time is essential. The aim of this paper is to determine which and how much data from an Android smartphone can be made directly accessible to the forensic investigator – without tedious investigations. For this purpose, an app has been developed that can be used with extremely limited storage of data in the handset and which outputs the extracted data immediately to the forensic workstation in a human- and machine-readable format.
KW  - Android
KW  - Digital triage
KW  - Triage-app
Y1  - 2023
SN  - 9798400707728
U6  - http://dx.doi.org/10.1145/3600160.3605017
N1  - ARES 2023: The 18th International Conference on Availability, Reliability and Security. August 29 - September 1, 2023. Benevento, Italy.
PB  - ACM
ER  - 
TY  - CHAP
A1  - Neugebauer, Georg
A1  - Brutschy, Lucas
A1  - Meyer, Ulrike
A1  - Wetzel, Susanne
ED  - Garcia-Alfaro, Joaquin
ED  - Lioudakis, Georgios
ED  - Cuppens-Boulahia, Nora
ED  - Foley, Simon
ED  - Fitzgerald, William M.
T1  - Privacy-preserving multi-party reconciliation secure in the malicious model
T2  - DPM 2013, SETOP 2013: Data Privacy Management and Autonomous Spontaneous Security
N2  - The problem of fair and privacy-preserving ordered set reconciliation arises in a variety of applications like auctions, e-voting, and appointment reconciliation. While several multi-party protocols have been proposed that solve this problem in the semi-honest model, there are no multi-party protocols that are secure in the malicious model so far. In this paper, we close this gap. Our newly proposed protocols are shown to be secure in the malicious model based on a variety of novel non-interactive zero-knowledge-proofs. We describe the implementation of our protocols and evaluate their performance in comparison to protocols solving the problem in the semi-honest case.
KW  - Privacy-enhancing technologies
KW  - Secure multi-party computation
KW  - Cryptographic protocols
KW  - Zero-knowledge proofs
KW  - Malicious model
Y1  - 2014
SN  - 978-3-642-54567-2 (Print)
SN  - 978-3-642-54568-9 (Online)
U6  - http://dx.doi.org/10.1007/978-3-642-54568-9_12
N1  - 8th International Workshop, DPM 2013, and 6th International Workshop, SETOP 2013, Egham, UK, September 12-13, 2013.

Part of the Lecture Notes in Computer Science book series (LNSC,volume 8247)
SP  - 178
EP  - 193
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Neumann, Tobias
A1  - Dülberg, Enno
A1  - Schiffer, Stefan
A1  - Ferrein, Alexander
T1  - A rotating platform for swift acquisition of dense 3D point clouds
T2  - Intelligent Robotics and Applications: 9th International Conference, ICIRA 2016, Tokyo, Japan, August 22-24, 2016, Proceedings, Part I
Y1  - 2016
SN  - 978-3-319-43505-3 (Print)
SN  - 978-3-319-43506-0 (Online)
U6  - http://dx.doi.org/10.1007/978-3-319-43506-0_22
N1  - Series: Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
VL  - 9834
SP  - 257
EP  - 268
PB  - Springer
ER  - 
TY  - CHAP
A1  - Neumann, Tobias
A1  - Ferrein, Alexander
A1  - Kallweit, Stephan
A1  - Scholl, Ingrid
T1  - Towards a mobile mapping robot for underground mines
T2  - 7th Conference of Robotics and Mechatronics : RobMech 2014 : 27th and 28th Nov. 2014, Cape Town
Y1  - 2014
SP  - 1
EP  - 6
ER  - 
TY  - CHAP
A1  - Niemueller, T.
A1  - Lakemeyer, G.
A1  - Reuter, S.
A1  - Jeschke, S.
A1  - Ferrein, Alexander
T1  - Benchmarking of Cyber-Physical Systems in Industrial Robotics: The RoboCup Logistics League as a CPS Benchmark Blueprint
T2  - Cyber-Physical Systems: Foundations, Principles and Applications
N2  - In the future, we expect manufacturing companies to follow a new paradigm that mandates more automation and autonomy in production processes. Such smart factories will offer a variety of production technologies as services that can be combined ad hoc to produce a large number of different product types and variants cost-effectively even in small lot sizes. This is enabled by cyber-physical systems that feature flexible automated planning methods for production scheduling, execution control, and in-factory logistics.

During development, testbeds are required to determine the applicability of integrated systems in such scenarios. Furthermore, benchmarks are needed to quantify and compare system performance in these industry-inspired scenarios at a comprehensible and manageable size which is, at the same time, complex enough to yield meaningful results.

In this chapter, based on our experience in the RoboCup Logistics League (RCLL) as a specific example, we derive a generic blueprint for how a holistic benchmark can be developed, which combines a specific scenario with a set of key performance indicators as metrics to evaluate the overall integrated system and its components.
KW  - Smart factory
KW  - Industry 4.0
KW  - Cyber-physical systems
KW  - Multi-robot systems
KW  - Autonomous mobile robots
Y1  - 2017
U6  - http://dx.doi.org/10.1016/B978-0-12-803801-7.00013-4
SP  - 193
EP  - 207
PB  - Academic Press
CY  - London
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Ferrein, Alexander
A1  - Reuter, Sebastian
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - The RoboCup Logistics League as a Holistic Multi-Robot Smart Factory Benchmark
T2  - Proceedings of the IROS 2015 Open forum on evaluation of results, replication of experiments and benchmarking in robotics research
N2  - With autonomous mobile robots receiving increased
attention in industrial contexts, the need for benchmarks
becomes more and more an urgent matter. The RoboCup
Logistics League (RCLL) is one specific industry-inspired scenario
focusing on production logistics within a Smart Factory.
In this paper, we describe how the RCLL allows to assess the
performance of a group of robots within the scenario as a
whole, focusing specifically on the coordination and cooperation
strategies and the methods and components to achieve them.
We report on recent efforts to analyze performance of teams in
2014 to understand the implications of the current grading
scheme, and derived criteria and metrics for performance
assessment based on Key Performance Indicators (KPI) adapted
from classic factory evaluation. We reflect on differences and
compatibility towards RoCKIn, a recent major benchmarking
European project.
Y1  - 2015
ER  - 
TY  - JOUR
A1  - Niemueller, Tim
A1  - Karras, Ulrich
A1  - Ferrein, Alexander
T1  - Meisterschaft der Maschinen: Die Industrial Logistic Liga
JF  - C´t Magazin für Computertechnik
Y1  - 2017
IS  - 26
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Lakemeyer, Gerhard
A1  - Ferrein, Alexander
ED  - Finzi, Alberto
T1  - The RoboCup Logistics League as a Benchmark for Planning in Robotics
T2  - Proceedings of the 3rd Workshop on Planning and Robotics (PlanRob-15); Jerusalem, Israel 7-8/6/2015
Y1  - 2015
SP  - 63
EP  - 68
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Neumann, Tobias
A1  - Henke, Christoph
A1  - Schönitz, Sebastian
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - Improvements for a robust production in the RoboCup logistics league 2016
T2  - RoboCup 2016: Robot World Cup XX. RoboCup 2016.
Y1  - 2017
SN  - 978-3-319-68792-6
U6  - http://dx.doi.org/10.1007/978-3-319-68792-6_49
SP  - 589
EP  - 600
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Neumann, Tobias
A1  - Henke, Christoph
A1  - Schönitz, Sebastian
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - International Harting Open Source Award 2016: Fawkes for the RoboCup Logistics League
T2  - RoboCup 2016: RoboCup 2016: Robot World Cup XX. RoboCup 2016
Y1  - 2017
SN  - 978-3-319-68792-6
U6  - http://dx.doi.org/10.1007/978-3-319-68792-6_53
N1  - Lecture Notes in Computer Science, LNCS, Vol 9776
SP  - 634
EP  - 642
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Reuter, Sebastian
A1  - Ewert, Daniel
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - Decisive Factors for the Success of the Carologistics RoboCup Team in the RoboCup Logistics League 2014
T2  - RoboCup 2014: Robot World Cup XVIII
Y1  - 2015
SN  - 978-3-319-18615-3
N1  - Lecture Notes in Computer Science ; 8992
SP  - 155
EP  - 167
PB  - Springer
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Reuter, Sebastian
A1  - Ewert, Daniel
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
ED  - Almeida, Luis
T1  - The Carologistics Approach to Cope with the Increased Complexity and New Challenges of the RoboCup Logistics League 2015
T2  - RoboCup 2015: Robot World Cup XIX
Y1  - 2016
SN  - 978-3-319-29339-4
U6  - http://dx.doi.org/10.1007/978-3-319-29339-4_4
N1  - Lecture Notes in Computer Science ; 9513
SP  - 47
EP  - 59
PB  - Springer International Publishing
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
ED  - Almeida, Luis
T1  - Fawkes for the RoboCup Logistics League
T2  - RoboCup 2015: Robot World Cup XIX
Y1  - 2016
SN  - 978-3-319-29339-4
U6  - http://dx.doi.org/10.1007/978-3-319-29339-4_31
N1  - Lecture Notes in Computer Science ; 9513
SP  - 365
EP  - 373
PB  - Springer International Publishing
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
ED  - Almeida, Luis
T1  - Evaluation of the RoboCup Logistics League and Derived Criteria for Future Competitions
T2  - RoboCup 2015: Robot World Cup XIX
Y1  - 2016
SN  - 978-3-319-29339-4
U6  - http://dx.doi.org/10.1007/978-3-319-29339-4_3
N1  - Lecture Notes in Computer Science ; 9513
SP  - 31
EP  - 43
PB  - Springer International Publishing
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemueller, Tim
A1  - Zwilling, Frederik
A1  - Lakemeyer, Gerhard
A1  - Löbach, Matthias
A1  - Reuter, Sebastian
A1  - Jeschke, Sabina
A1  - Ferrein, Alexander
T1  - Cyber-Physical System Intelligence
T2  - Industrial Internet of Things
N2  - Cyber-physical systems are ever more common in manufacturing industries. Increasing their autonomy has been declared an explicit goal, for example, as part of the Industry 4.0 vision. To achieve this system intelligence, principled and software-driven methods are required to analyze sensing data, make goal-directed decisions, and eventually execute and monitor chosen tasks. In this chapter, we present a number of knowledge-based approaches to these problems and case studies with in-depth evaluation results of several different implementations for groups of autonomous mobile robots performing in-house logistics in a smart factory. We focus on knowledge-based systems because besides providing expressive languages and capable reasoning techniques, they also allow for explaining how a particular sequence of actions came about, for example, in the case of a failure.
KW  - Smart factory
KW  - Industry 4.0
KW  - Multi-robot systems
KW  - Autonomous mobile robots
KW  - RoboCup
Y1  - 2017
SN  - 978-3-319-42559-7
U6  - http://dx.doi.org/10.1007/978-3-319-42559-7_17
N1  - Springer Series in Wireless Technology
SP  - 447
EP  - 472
PB  - Springer
CY  - Cham
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Ewert, Daniel
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - The Carologistics RoboCup Logistics Team 2013
T2  - RoboCup 2013 : Eindhoven
Y1  - 2013
SP  - 1
EP  - 8
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Ewert, Daniel
A1  - Reuter, Sebastian
A1  - Ferrein, Alexander
A1  - Jeschke, Sabina
A1  - Lakemeyer, Gerhard
T1  - RoboCup logistics league sponsored by festo: A competitive factory automation testbed
T2  - RoboCup 2013: Robot World Cup XVII :  Eindhoven; Netherlands; 1 July 2013 through 1 July 2013. (Lecture notes in computer science ; 8371)
N2  - A new trend in automation is to deploy so-called cyber-physical systems (CPS) which combine computation with physical processes. The novel RoboCup Logistics League Sponsored by Festo (LLSF) aims at such CPS logistic scenarios in an automation setting. A team of robots has to produce products from a number of semi-finished products which they have to machine during the game. Different production plans are possible and the robots need to recycle scrap byproducts. This way, the LLSF is a very interesting league offering a number of challenging research questions for planning, coordination, or communication in an application-driven scenario. In this paper, we outline the objectives of the LLSF and present steps for developing the league further towards a benchmark for logistics scenarios for CPS. As a major milestone we present the new automated referee system which helps in governing the game play as well as keeping track of the scored points in a very complex factory scenario.
Y1  - 2014
SN  - 978-3-662-44467-2 (Print) 978-3-662-44468-9 (Online)
SP  - 336
EP  - 347
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Ewert, Daniel
A1  - Reuter, Sebastian
A1  - Karras, Ulrich
A1  - Ferrein, Alexander
T1  - Towards benchmarking cyber-physical systems in factory automation scenarios
T2  - KI 2013: advances in artificial intelligence : 36th Annual German Conference on AI, Koblenz, Germany, September 16-20, 2013 ; proceedings / Ingo J. Timm ... (ed.). (Lecture notes in computer science ; 8077)
Y1  - 2013
SN  - 978-3-642-40941-7
SP  - 296
EP  - 299
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Niemüller, Tim
A1  - Ferrein, Alexander
A1  - Beck, Daniel
A1  - Lakemeyer, Gerhard
T1  - Design Principles of the Component-Based Robot Software Framework Fawkes
JF  - Simulation, Modeling, and Programming for Autonomous Robots
Y1  - 2010
N1  - Lecture Notes in Computer Science ; 6472 ; Second International Conference, SIMPAR 2010, Darmstadt, Germany, November 15-18, 2010. Proceedings
SP  - 300
EP  - 311
ER  - 
TY  - JOUR
A1  - Niemüller, Tim
A1  - Ferrein, Alexander
A1  - Eckel, Gerhard
A1  - Pirro, David
A1  - Podbregar, Patrick
A1  - Kellner, Tobias
A1  - Rath, Christoph
A1  - Steinbauer, Gerald
T1  - Providing Ground-truth Data for the Nao Robot Platform
JF  - RoboCup 2010: Robot Soccer World Cup XIV
Y1  - 2011
SN  - 978-3-642-20217-9
N1  - Lecture Notes in Computer Science ; 6556
SP  - 133
EP  - 144
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Niemüller, Tim
A1  - Ferrein, Alexander
A1  - Lakemeyer, Gerhard
T1  - A Lua-based Behavior Engine for Controlling the Humanoid Robot Nao
JF  - RoboCup 2009: Robot Soccer World Cup XIII
Y1  - 2010
N1  - Lecture Notes in Computer Science ; 5949
SP  - 240
EP  - 251
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Lakemeyer, Gerhard
A1  - Ferrein, Alexander
T1  - Aspects of integrating diverse software into robotic systems extended abstract
T2  - ICRA 2013 - 8th Workshop on Software Development and Integration in Robotics (SDIR), Karlsruhe, Germany
Y1  - 2013
SP  - 1
EP  - 2
ER  - 
TY  - CHAP
A1  - Niemüller, Tim
A1  - Lakemeyer, Gerhard
A1  - Ferrein, Alexander
ED  - Boots, Byron
T1  - Incremental task-level reasoning in a competitive factory automation scenario
T2  - Designing intelligent robots : reintegrating AI II ; papers from the AAAI spring symposium ; [held March 25 - 27, 2013 in Palo Alto, California, USA, on the campus of Stanford University]. (Technical Report / Association for the Advancement of Artificial Intelligence ; 2013,4)
Y1  - 2013
SN  - 9781577356011
SP  - 43
EP  - 48
ER  - 
TY  - JOUR
A1  - Niemüller, Tim
A1  - Lakemeyer, Gerhard
A1  - Ferrein, Alexander
A1  - Reuter, S.
A1  - Ewert, D.
A1  - Jeschke, S.
A1  - Pensky, D.
A1  - Karras, Ulrich
T1  - Proposal for advancements to the LLSF in 2014 and beyond
Y1  - 2013
SP  - Publ. online
ER  - 
TY  - CHAP
A1  - Nikolovski, Gjorgji
A1  - Limpert, Nicolas
A1  - Nessau, Hendrik
A1  - Reke, Michael
A1  - Ferrein, Alexander
T1  - Model-predictive control with parallelised optimisation for the navigation of autonomous mining vehicles
T2  - 2023 IEEE Intelligent Vehicles Symposium (IV)
N2  - The work in modern open-pit and underground mines requires the transportation of large amounts of resources between fixed points. The navigation to these fixed points is a repetitive task that can be automated. The challenge in automating the navigation of vehicles commonly used in mines is the systemic properties of such vehicles. Many mining vehicles, such as the one we have used in the research for this paper, use steering systems with an articulated joint bending the vehicle’s drive axis to change its course and a hydraulic drive system to actuate axial drive components or the movements of tippers if available. To address the difficulties of controlling such a vehicle, we present a model-predictive approach for controlling the vehicle. While the control optimisation based on a parallel error minimisation of the predicted state has already been established in the past, we provide insight into the design and implementation of an MPC for an articulated mining vehicle and show the results of real-world experiments in an open-pit mine environment.
KW  - Mpc
KW  - Control
KW  - Path-following
KW  - Navigation
KW  - Automation
Y1  - 2023
SN  - 979-8-3503-4691-6 (Online)
SN  - 979-8-3503-4692-3 (Print)
U6  - http://dx.doi.org/10.1109/IV55152.2023.10186806
N1  - IEEE Symposium on Intelligent Vehicle, 4.-7. June 2023, Anchorage, AK, USA.
PB  - IEEE
ER  - 
TY  - CHAP
A1  - Nikolovski, Gjorgji
A1  - Reke, Michael
A1  - Elsen, Ingo
A1  - Schiffer, Stefan
T1  - Machine learning based 3D object detection for navigation in unstructured environments
T2  - 2021 IEEE Intelligent Vehicles Symposium Workshops (IV Workshops)
N2  - In this paper we investigate the use of deep neural networks for 3D object detection in uncommon, unstructured environments such as in an open-pit mine. While neural nets are frequently used for object detection in regular autonomous driving applications, more unusual driving scenarios aside street traffic pose additional challenges. For one, the collection of appropriate data sets to train the networks is an issue. For another, testing the performance of trained networks often requires tailored integration with the particular domain as well. While there exist different solutions for these problems in regular autonomous driving, there are only very few approaches that work for special domains just as well. We address both the challenges above in this work. First, we discuss two possible ways of acquiring data for training and evaluation. That is, we evaluate a semi-automated annotation of recorded LIDAR data and we examine synthetic data generation. Using these datasets we train and test different deep neural network for the task of object detection. Second, we propose a possible integration of a ROS2 detector module for an autonomous driving platform. Finally, we present the performance of three state-of-the-art deep neural networks in the domain of 3D object detection on a synthetic dataset and a smaller one containing a characteristic object from an open-pit mine.
KW  - 3D object detection
KW  - LiDAR
KW  - autonomous driving
KW  - Deep learning
KW  - Three-dimensional displays
Y1  - 2021
SN  - 978-1-6654-7921-9
U6  - http://dx.doi.org/10.1109/IVWorkshops54471.2021.9669218
N1  - 2021 IEEE Intelligent Vehicles Symposium Workshops (IV Workshops), 11-17 July 2021,  Nagoya, Japan.
SP  - 236
EP  - 242
PB  - IEEE
ER  - 
TY  - JOUR
A1  - Noureddine, Yacine
A1  - Bitz, Andreas
A1  - Ladd, Mark E.
A1  - Thürling, Markus
A1  - Ladd, Susanne C.
A1  - Schaefers, Gregor
A1  - Kraff, Oliver
T1  - Experience with magnetic resonance imaging of human subjects with passive implants and tattoos at 7 T: a retrospective study
JF  - Magnetic Resonance Materials in Physics, Biology and Medicine
Y1  - 2015
U6  - http://dx.doi.org/10.1007/s10334-015-0499-y
SN  - 1352-8661
VL  - 28
IS  - 6
SP  - 577
EP  - 590
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Noureddine, Yacine
A1  - Kraff, Oliver
A1  - Ladd, Mark E.
A1  - Wrede, Karsten
A1  - Chen, Bixia
A1  - Quick, Harald H.
A1  - Schaefers, Georg
A1  - Bitz, Andreas
T1  - Radiofrequency induced heating around aneurysm clips using a generic birdcage head coil at 7 Tesla under consideration of the minimum distance to decouple multiple aneurysm clips
JF  - Magnetic Resonance in Medicine
Y1  - 2019
U6  - http://dx.doi.org/10.1002/mrm.27835
SN  - 1522-2594
IS  - Early view
SP  - 1
EP  - 17
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Noureddine, Yacine
A1  - Kraff, Oliver
A1  - Ladd, Mark E.
A1  - Wrede, Karsten H.
A1  - Chen, Bixia
A1  - Quick, Harald H.
A1  - Schaefers, Gregor
A1  - Bitz, Andreas
T1  - In vitro and in silico assessment of RF-induced heating around intracranial aneurysm clips at 7 Tesla
JF  - Magnetic Resonance in Medicine
Y1  - 2017
U6  - http://dx.doi.org/10.1002/mrm.26650
SN  - 1522-2594
IS  - Early view
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - CHAP
A1  - Nursinski-Stolberg, André
A1  - Gangatharan, Kiritharan
A1  - Czarnecki, Christian
ED  - Mayr, Heinrich C.
ED  - Pinzger, Martin
T1  - Development of a subject-oriented reference process model for the telecommunications industry
T2  - GI Edition Proceedings Band 259 INFORMATIK 2016
N2  - Generally the usage of reference models can be structured top-down or bottom-up. The practical need of agile change and flexible organizational implementation requires a consistent mapping to an operational level. In this context, well-established reference process models are typically structured top-down. The subject-oriented Business Process Management (sBPM) offers a modeling concept that is structured bottom-up and concentrates on the process actors on an
operational level. This paper applies sBPM to the enhanced Telecom Operations Map (eTOM), a well-accepted reference process model in the telecommunications industry. The resulting design artifact is a concrete example for a combination of a bottom-up and top-down developed reference model. The results are evaluated and confirmed in practical context through the involvement of the industry body TMForum.
KW  - Subject-oriented Business Process Management
KW  - Reference Process Model
KW  - eTOM
KW  - Telecommunications Industry.
Y1  - 2016
SN  - 9783885796534
SN  - 1617-5468
N1  - 26.-30. September 2016, Klagenfurt.
SP  - 699
EP  - 712
PB  - Gesellschaft für Informatik e.V.
CY  - Bonn
ER  - 
TY  - PAT
A1  - Nötzold, K.
A1  - Bragard, Michael
A1  - Fink, K.
A1  - Griessel, R.
A1  - Wegener, R.
T1  - Cascaded H-bridge converter with transformer based cell power balancing in each voltage level  : [Patentschrift]
Y1  - 2014
N1  - Titel des US-Patents: Bypassed cascaded cell converter : [patent of invention]. - Außerdem veröffentlicht als CN103997231 (A)
PB  - Europäisches Patentamt / United States Patent and Trademark Office [u.a.]
CY  - Den Haag / Alexandria, VA
ER  - 
TY  - CHAP
A1  - Nötzold, K.
A1  - Uphues, A.
A1  - Wegener, R.
A1  - Fink, K.
A1  - Bragard, Michael
A1  - Griessel, R.
A1  - Soter, S.
T1  - Inverter based test setup for LVRT verification of a full-scale 2 MW wind power converter
T2  - 15th European Conference on Power Electronics and Applications (EPE), 2013 : 2 - 6 Sept. 2013, Lille, France / [EPE Association; PELS, IEEE Power Electronics Society]
Y1  - 2013
SN  - 978-1-4799-0115-9 (Online-Ausg.)
U6  - http://dx.doi.org/10.1109/EPE.2013.6634752
SP  - 1037
EP  - 1042
PB  - IEEE
CY  - Piscataway, NJ
ER  - 
TY  - CHAP
A1  - Nötzold, K.
A1  - Uphues, A.
A1  - Wegener, R.
A1  - Soter, S.
A1  - Fink, K.
A1  - Bragard, Michael
A1  - Griessel, R.
T1  - Inverter based test setup for LVRT verification of a full-scale 2 MW wind power converter
T2  - EPE Joint Wind Energy and T&D Chapters Seminar : 28th and 29th of June 2012, in the Utzon Centre, Aalborg, Denmark ; papers, posters, presentations. - Session 2: Grid connection, compliance
Y1  - 2012
PB  - EPE Association
CY  - Brussels
ER  - 
TY  - JOUR
A1  - Orzada, S.
A1  - Maderwald, S.
A1  - Poser, B. A.
A1  - Johst, S.
A1  - Kannengiesser, S.
A1  - Ladd, M. E.
A1  - Bitz, Andreas
T1  - Time-interleaved acquisition of modes: an analysis of SAR and image contrast implications
JF  - Magnetic Resonance in Medicine
N2  - s the magnetic field strength and therefore the operational frequency in MRI are increased, the radiofrequency wavelength approaches the size of the human head/body, resulting in wave effects which cause signal decreases and dropouts. Especially, whole-body imaging at 7 T and higher is therefore challenging. Recently, an acquisition scheme called time-interleaved acquisition of modes has been proposed to tackle the inhomogeneity problems in high-field MRI. The basic premise is to excite two (or more) different Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-1 modes using static radiofrequency shimming in an interleaved acquisition, where the complementary radiofrequency patterns of the two modes can be exploited to improve overall signal homogeneity. In this work, the impact of time-interleaved acquisition of mode on image contrast as well as on time-averaged specific absorption rate is addressed in detail. Time-interleaved acquisition of mode is superior in Burn:x-wiley:07403194:media:MRM23081:tex2gif-stack-2 homogeneity compared with conventional radiofrequency shimming while being highly specific absorption rate efficient. Time-interleaved acquisition of modes can enable almost homogeneous high-field imaging throughout the entire field of view in PD, T2, and T2*-weighted imaging and, if a specified homogeneity criterion is met, in T1-weighted imaging as well.
Y1  - 2012
U6  - http://dx.doi.org/10.1002/mrm.23081
SN  - 1522-2594
VL  - 67
IS  - 4
SP  - 1033
EP  - 1041
PB  - Wiley-Liss
CY  - New York
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Bitz, Andreas
A1  - Johst, Sören
A1  - Gratz, Marcel
A1  - Völker, Maximilian N.
A1  - Kraff, Oliver
A1  - Abuelhaija, Ashraf
A1  - Fiedler, Thomas M.
A1  - Solbach, Klaus
A1  - Quick, Harald H.
A1  - Ladd, Mark E.
T1  - Analysis of an integrated 8-Channel Tx/Rx body array for use as a body coil in 7-Tesla MRI
JF  - Frontiers in Physics
Y1  - 2017
U6  - http://dx.doi.org/10.3389/fphy.2017.00017
SN  - 2296-424X
N1  - Article number 17
VL  - 5
IS  - Jun
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Bitz, Andreas
A1  - Schäfer, Lena C.
A1  - Ladd, Susanne C.
A1  - Ladd, Mark E.
A1  - Maderwald, Stefan
T1  - Open design eight-channel transmit/receive coil for high-resolution and real-time ankle imaging at 7 T
JF  - Medical Physics
N2  - Purpose:
At 1.5 T, real-time MRI of joint movement has been shown to be feasible. However, 7 T, provides higher SNR and thus an improved potential for parallel imaging acceleration. The purpose of this work was to build an open, U-shaped eight-channel transmit/receive microstrip coil for 7 T MRI to enable high-resolution and real-time imaging of the moving ankle joint.

Methods:
A U-shaped eight-channel transmit/receive array for the human ankle was built.urn:x-wiley:00942405:mp3399:equation:mp3399-math-0001-parameters and urn:x-wiley:00942405:mp3399:equation:mp3399-math-0002-factor were measured. SAR calculations of different ankle postures were performed to ensure patient safety. Inhomogeneities in the transmit field consequent to the open design were compensated for by the use of static RF shimming. High-resolution and real-time imaging was performed in human volunteers.

Results:
The presented array showed good performance with regard to patient comfort and image quality. High acceleration factors of up to 4 are feasible without visible acceleration artifacts. Reasonable image homogeneity was achieved with RF shimming.

Conclusions:
Open, noncylindrical designs for transmit/receive coils are practical at 7 T and real-time imaging of the moving joint is feasible with the presented coil design.
Y1  - 2011
U6  - http://dx.doi.org/10.1118/1.3553399
SN  - 2473-4209
VL  - 38
IS  - 3
SP  - 1162
EP  - 1167
PB  - Wiley
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Fiedler, Thomas M.
A1  - Bitz, Andreas
A1  - Ladd, Mark E.
A1  - Quick, Harald H.
T1  - Local SAR compression with overestimation control to reduce maximum relative SAR overestimation and improve multi-channel RF array performance
JF  - Magnetic Resonance Materials in Physics, Biology and Medicine
N2  - Objective
In local SAR compression algorithms, the overestimation is generally not linearly dependent on actual local SAR. This can lead to large relative overestimation at low actual SAR values, unnecessarily constraining transmit array performance.

Method
Two strategies are proposed to reduce maximum relative overestimation for a given number of VOPs. The first strategy uses an overestimation matrix that roughly approximates actual local SAR; the second strategy uses a small set of pre-calculated VOPs as the overestimation term for the compression.

Result
Comparison with a previous method shows that for a given maximum relative overestimation the number of VOPs can be reduced by around 20% at the cost of a higher absolute overestimation at high actual local SAR values.

Conclusion
The proposed strategies outperform a previously published strategy and can improve the SAR compression where maximum relative overestimation constrains the performance of parallel transmission.
Y1  - 2020
SN  - 1352-8661
U6  - http://dx.doi.org/10.1007/s10334-020-00890-0
IS  - 34 (2021)
SP  - 153
EP  - 164
PB  - Springer
CY  - Heidelberg
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Johst, Sören
A1  - Maderwald, Stefan
A1  - Bitz, Andreas
A1  - Solbach, Klaus
A1  - Ladd, Mark E.
T1  - Mitigation of B1(+) inhomogeneity on single-channel transmit systems with TIAMO
JF  - Magnetic Resonance in Medicine
Y1  - 2013
U6  - http://dx.doi.org/10.1002/mrm.24453
SN  - 1522-2594
VL  - 70
IS  - 1
SP  - 290
EP  - 294
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Ladd, Mark E.
A1  - Bitz, Andreas
T1  - A method to approximate maximum local SAR in multichannel transmit MR systems without transmit phase information
JF  - Magnetic Resonance in Medicine
N2  - Purpose
To calculate local specific absorption rate (SAR) correctly, both the amplitude and phase of the signal in each transmit channel have to be known. In this work, we propose a method to derive a conservative upper bound for the local SAR, with a reasonable safety margin without knowledge of the transmit phases of the channels.

Methods
The proposed method uses virtual observation points (VOPs). Correction factors are calculated for each set of VOPs that prevent underestimation of local SAR when the VOPs are applied with the correct amplitudes but fixed phases.

Results
The proposed method proved to be superior to the worst-case calculation based on the maximum eigenvalue of the VOPs. The mean overestimation for six coil setups could be reduced, whereas no underestimation of the maximum local SAR occurred. In the best investigated case, the overestimation could be reduced from a factor of 3.3 to a factor of 1.7.

Conclusion
The upper bound for the local SAR calculated with the proposed method allows a fast estimation of the local SAR based on power measurements in the transmit channels and facilitates SAR monitoring in systems that do not have the capability to monitor transmit phases
Y1  - 2016
U6  - http://dx.doi.org/10.1002/mrm.26398
SN  - 1522-2594
VL  - 78
IS  - 2
SP  - 805
EP  - 811
PB  - International Society for Magnetic Resonance in Medicine
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Maderwald, Stefan
A1  - Poser, Benedikt Andreas
A1  - Bitz, Andreas
A1  - Quick, Harald H.
A1  - Ladd, Mark E.
T1  - RF excitation using time interleaved acquisition of modes (TIAMO) to address B1 inhomogeneity in high-field MRI
JF  - Magnetic Resonance in Medicine
N2  - As the field strength and, therefore, the operational frequency in MRI is increased, the wavelength approaches the size of the human head/body, resulting in wave effects, which cause signal decreases and dropouts. Several multichannel approaches have been proposed to try to tackle these problems, including RF shimming, where each element in an array is driven by its own amplifier and modulated with a certain (constant) amplitude and phase relative to the other elements, and Transmit SENSE, where spatially tailored RF pulses are used. In this article, a relatively inexpensive and easy to use imaging scheme for 7 Tesla imaging is proposed to mitigate signal voids due to B1 field inhomogeneity. Two time-interleaved images are acquired using a different excitation mode for each. By forming virtual receive elements, both images are reconstructed together using GRAPPA to achieve a more homogeneous image, with only small SNR and SAR penalty in head and body imaging at 7 Tesla.
Y1  - 2010
U6  - http://dx.doi.org/10.1002/mrm.22527
SN  - 1522-2594
VL  - 64
IS  - 2
SP  - 327
EP  - 333
PB  - Wiley-Liss
CY  - New York
ER  - 
TY  - JOUR
A1  - Orzada, Stephan
A1  - Solbach, Klaus
A1  - Gratz, Marcel
A1  - Brunheim, Sascha
A1  - Fiedler, Thomas M.
A1  - Johst, Sören
A1  - Bitz, Andreas
A1  - Shooshtary, Samaneh
A1  - Abuelhaija, Asjraf
A1  - Voelker, Maximilian N.
A1  - Rietsch, Stefan H. G.
A1  - Kraff, Oliver
A1  - Maderwald, Stefan
A1  - Flöser, Martina
A1  - Oehmingen, Mark
A1  - Quick, Harald H.
A1  - Ladd, Mark E.
T1  - A 32-channel parallel transmit system add-on for 7T MRI
JF  - Plos one
Y1  - 2019
U6  - http://dx.doi.org/10.1371/journal.pone.0222452
ER  - 
TY  - CHAP
A1  - Ostkotte, Sebastian
A1  - Peters, Constantin
A1  - Hüning, Felix
A1  - Bragard, Michael
T1  - Design, implementation and verification of an rotational incremental position encoder based on the magnetic Wiegand effect
T2  - 2022 ELEKTRO (ELEKTRO)
N2  - This paper covers the use of the magnetic Wiegand effect to design an innovative incremental encoder. First, a theoretical design is given, followed by an estimation of the achievable accuracy and an optimization in open-loop operation.
Finally, a successful experimental verification is presented. For this purpose, a permanent magnet synchronous machine is controlled in a field-oriented manner, using the angle information of the prototype.
KW  - Position Encoder
KW  - Rotational Encoder
KW  - Wiegand Effect
KW  - Angle Sensor
KW  - Incremental Encoder
Y1  - 2022
SN  - 978-1-6654-6726-1
SN  - 978-1-6654-6727-8
U6  - http://dx.doi.org/10.1109/ELEKTRO53996.2022.9803477
SN  - 2691-0616
N1  - 2022 ELEKTRO (ELEKTRO), 23-26 Mai 2022, Krakow, Poland.
PB  - IEEE
ER  - 
TY  - JOUR
A1  - Oßmann, Martin
A1  - Hattrup, C.
A1  - Broeck, H. W. van der
T1  - Fast estimation techniques for digital control of resonant converters / Hattrup, C.; van der Broeck, H.W.; Ossmann, M.;
JF  - IEEE Transaction on Power Electronics. 18 (2003), H. 1
Y1  - 2003
SN  - 0885-8993
N1  - Part 2
SP  - 365
EP  - 372
ER  - 
TY  - JOUR
A1  - Oßmann, Martin
A1  - Kazay, B.
T1  - Simple circuit provides high-side current sensing / Ossmann, M ; Kazay, B.
JF  - EDN. 45 (2000), H. 21
Y1  - 2000
SN  - 0012-7515
SP  - 200
EP  - 200
ER  - 
TY  - JOUR
A1  - Oßmann, Martin
A1  - Kazay, B.
T1  - Single mu C pin makes half-duplex RS-232C / Ossmann, M
JF  - EDN. 44 (1999), H. 16
Y1  - 1999
SN  - 0012-7515
SP  - 118
ER  - 
TY  - JOUR
A1  - Pelikan, Erich
A1  - Scholl, Ingrid
T1  - Die Wavelet-Transformation. Pelikan, Erich; Scholl, Ingrid
JF  - Bildverarbeitung für die Medizin. Lehmann, T.; Oberschelp, W.; Pelikan, E.; Repges,R.
Y1  - 1997
SP  - 253
EP  - 282
PB  - Springer
CY  - Berlin
ER  - 
TY  - CHAP
A1  - Penne, Jochen
A1  - Profittlich, Martin
A1  - Ringbeck, Thorsten
A1  - Buxbaum, Bernd
ED  - D, Nicola D'Apuzzo
T1  - Touchless detailed 3D scan of human hand anatomy using time-of-flight cameras
T2  - Proceedings of the International Conference on 3D Body Scanning Technologies : Lugano, Switzerland, 19-20 October 2010
Y1  - 2010
SN  - 978-3-033-02714-5
SP  - 361
EP  - 369
PB  - Hometrica Consulting
CY  - Zürich
ER  - 
TY  - CHAP
A1  - Pfetsch, Marc E.
A1  - Abele, Eberhard
A1  - Altherr, Lena
A1  - Bölling, Christian
A1  - Brötz, Nicolas
A1  - Dietrich, Ingo
A1  - Gally, Tristan
A1  - Geßner, Felix
A1  - Groche, Peter
A1  - Hoppe, Florian
A1  - Kirchner, Eckhard
A1  - Kloberdanz, Hermann
A1  - Knoll, Maximilian
A1  - Kolvenbach, Philip
A1  - Kuttich-Meinlschmidt, Anja
A1  - Leise, Philipp
A1  - Lorenz, Ulf
A1  - Matei, Alexander
A1  - Molitor, Dirk A.
A1  - Niessen, Pia
A1  - Pelz, Peter F.
A1  - Rexer, Manuel
A1  - Schmitt, Andreas
A1  - Schmitt, Johann M.
A1  - Schulte, Fiona
A1  - Ulbrich, Stefan
A1  - Weigold, Matthias
T1  - Strategies for mastering uncertainty
T2  - Mastering uncertainty in mechanical engineering
N2  - This chapter describes three general strategies to master uncertainty in technical systems: robustness, flexibility and resilience. It builds on the previous chapters about methods to analyse and identify uncertainty and may rely on the availability of technologies for particular systems, such as active components. Robustness aims for the design of technical systems that are insensitive to anticipated uncertainties. Flexibility increases the ability of a system to work under different situations. Resilience extends this characteristic by requiring a given minimal functional performance, even after disturbances or failure of system components, and it may incorporate recovery. The three strategies are described and discussed in turn. Moreover, they are demonstrated on specific technical systems.
Y1  - 2021
SN  - 978-3-030-78353-2
U6  - http://dx.doi.org/10.1007/978-3-030-78354-9_6
N1  - Part of the Springer Tracts in Mechanical Engineering book series (STME)
SP  - 365
EP  - 456
PB  - Springer
CY  - Cham
ER  -