@inproceedings{GligorevicSorger2002, author = {Gligorevic, Snjezana and Sorger, Ulrich}, title = {A new approach to tracking time-variant channels}, series = {Proceedings / 5th International Symposium on Wireless Personal Multimedia Communications : WPMC : October 27 - 30, 2002, Honolulu, Hawaii ; vol. 3}, booktitle = {Proceedings / 5th International Symposium on Wireless Personal Multimedia Communications : WPMC : October 27 - 30, 2002, Honolulu, Hawaii ; vol. 3}, organization = {International Symposium on Wireless Personal Multimedia Communications <5, 2002, Honolulu>}, isbn = {0-7803-7442-8}, issn = {1347-6890}, pages = {1342 -- 1345}, year = {2002}, language = {en} } @article{HueningHeuermannWacheetal.2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef and Jajo, Rami Audisho}, title = {A new wireless sensor interface using dual-mode radio}, series = {Journal of Sensors and Sensor Systems : JSSS}, volume = {Volume 7}, journal = {Journal of Sensors and Sensor Systems : JSSS}, number = {2}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, doi = {10.5194/jsss-7-507-2018}, pages = {507 -- 515}, year = {2018}, abstract = {The integration of sensors is one of the major tasks in embedded, control and "internet of things" (IoT) applications. For the integration mainly digital interfaces are used, starting from rather simple pulse-width modulation (PWM) interface to more complex interfaces like CAN (Controller Area Network). Even though these interfaces are tethered by definition, a wireless realization is highly welcome in many applications to reduce cable and connector cost, increase the flexibility and realize new emerging applications like wireless control systems. Currently used wireless solutions like Bluetooth, WirelessHART or IO-Link Wireless use dedicated communication standards and corresponding higher protocol layers to realize the wireless communication. Due to the complexity of the communication and the protocol handling, additional latency and jitter are introduced to the data communication that can meet the requirements for many applications. Even though tunnelling of other bus data like CAN data is generally also possible the latency and jitter prevent the tunnelling from being transparent for the bus system. Therefore a new basic technology based on dual-mode radio is used to realize a wireless communication on the physical layer only, enabling a reliable and real-time data transfer. As this system operates on the physical layer it is independent of any higher layers of the OSI (open systems interconnection) model. Hence it can be used for several different communication systems to replace the tethered physical layer. A prototype is developed and tested for real-time wireless PWM, SENT (single-edge nibble transmission) and CAN data transfer with very low latency and jitter.}, language = {en} } @inproceedings{SchoppNachtrodtHeuermannetal.2012, author = {Schopp, Christoph and Nachtrodt, Frederik and Heuermann, Holger and Scherer, Ulrich W. and Mostacci, Domiziano and Finger, Torsten and Tietsch, Wolfgang}, title = {A novel 2.45 GHz/200 W Microwave Plasma Jet for High Temperature Applications above 3600 K}, series = {Journal of Physics : Conference Series}, volume = {406}, booktitle = {Journal of Physics : Conference Series}, number = {012029}, issn = {1742-6596}, pages = {5}, year = {2012}, language = {en} } @article{HeuermannLuenebach2005, author = {Heuermann, Holger and L{\"u}nebach, M.}, title = {A Novel Dual-Mode-Design for Push-Push Oscillators with Improved Phase Noise Performance. Heuermann, Holger; L{\"u}nebach, M.}, series = {Conference proceedings : 3 - 7 October 2005, CNIT la D{\´e}fense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 1}, journal = {Conference proceedings : 3 - 7 October 2005, CNIT la D{\´e}fense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 1}, publisher = {Horizon House Publ}, address = {London}, isbn = {2-9600551-0-1}, pages = {4 pp.}, year = {2005}, language = {en} } @article{Schuba1997, author = {Schuba, Marko}, title = {A Performance Evaluation of Connectionless Overlay Networks for ATM}, series = {INFOCOM ´97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings Vol. 1}, journal = {INFOCOM ´97. Sixteenth Annual Joint Conference of the IEEE Computer and Communications Societies. Proceedings Vol. 1}, isbn = {0-8186-7780-5}, pages = {152 -- 158}, year = {1997}, language = {en} } @inproceedings{Elsen1998, author = {Elsen, Ingo}, title = {A pixel based approach to view based object recognition with self-organizing neural networks}, series = {IECON'98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society}, booktitle = {IECON'98. Proceedings of the 24th Annual Conference of the IEEE Industrial Electronics Society}, publisher = {IEEE}, address = {New York}, isbn = {0-7803-4503-7}, doi = {10.1109/IECON.1998.724032}, pages = {2040 -- 2044}, year = {1998}, abstract = {This paper addresses the pixel based classification of three dimensional objects from arbitrary views. To perform this task a coding strategy, inspired by the biological model of human vision, for pixel data is described. The coding strategy ensures that the input data is invariant against shift, scale and rotation of the object in the input domain. The image data is used as input to a class of self organizing neural networks, the Kohonen-maps or self-organizing feature maps (SOFM). To verify this approach two test sets have been generated: the first set, consisting of artificially generated images, is used to examine the classification properties of the SOFMs; the second test set examines the clustering capabilities of the SOFM when real world image data is applied to the network after it has been preprocessed to be invariant against shift, scale and rotation. It is shown that the clustering capability of the SOFM is strongly dependant on the invariance coding of the images.}, language = {en} } @article{RoepkeKoehlerDruryetal.2020, author = {Roepke, Rene and K{\"o}hler, Klemens and Drury, Vincent and Schroeder, Ulrik and Wolf, Martin and Meyer, Ulrike}, title = {A pond full of phishing games - analysis of learning games for anti-phishing education}, series = {Model-driven Simulation and Training Environments for Cybersecurity. MSTEC 2020}, journal = {Model-driven Simulation and Training Environments for Cybersecurity. MSTEC 2020}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-62433-0}, doi = {10.1007/978-3-030-62433-0_32020}, pages = {41 -- 60}, year = {2020}, abstract = {Game-based learning is a promising approach to anti-phishing education, as it fosters motivation and can help reduce the perceived difficulty of the educational material. Over the years, several prototypes for game-based applications have been proposed, that follow different approaches in content selection, presentation, and game mechanics. In this paper, a literature and product review of existing learning games is presented. Based on research papers and accessible applications, an in-depth analysis was conducted, encompassing target groups, educational contexts, learning goals based on Bloom's Revised Taxonomy, and learning content. As a result of this review, we created the publications on games (POG) data set for the domain of anti-phishing education. While there are games that can convey factual and conceptual knowledge, we find that most games are either unavailable, fail to convey procedural knowledge or lack technical depth. Thus, we identify potential areas of improvement for games suitable for end-users in informal learning contexts.}, language = {en} } @inproceedings{NeumannDuelbergSchifferetal.2016, author = {Neumann, Tobias and D{\"u}lberg, Enno and Schiffer, Stefan and Ferrein, Alexander}, title = {A rotating platform for swift acquisition of dense 3D point clouds}, series = {Intelligent Robotics and Applications: 9th International Conference, ICIRA 2016, Tokyo, Japan, August 22-24, 2016, Proceedings, Part I}, volume = {9834}, booktitle = {Intelligent Robotics and Applications: 9th International Conference, ICIRA 2016, Tokyo, Japan, August 22-24, 2016, Proceedings, Part I}, publisher = {Springer}, isbn = {978-3-319-43505-3 (Print)}, doi = {10.1007/978-3-319-43506-0_22}, pages = {257 -- 268}, year = {2016}, language = {en} } @inproceedings{RekePeterSchulteTiggesetal.2020, author = {Reke, Michael and Peter, Daniel and Schulte-Tigges, Joschua and Schiffer, Stefan and Ferrein, Alexander and Walter, Thomas and Matheis, Dominik}, title = {A Self-Driving Car Architecture in ROS2}, series = {2020 International SAUPEC/RobMech/PRASA Conference, Cape Town, South Africa}, booktitle = {2020 International SAUPEC/RobMech/PRASA Conference, Cape Town, South Africa}, publisher = {IEEE}, address = {New York, NY}, isbn = {978-1-7281-4162-6}, doi = {10.1109/SAUPEC/RobMech/PRASA48453.2020.9041020}, pages = {1 -- 6}, year = {2020}, abstract = {In this paper we report on an architecture for a self-driving car that is based on ROS2. Self-driving cars have to take decisions based on their sensory input in real-time, providing high reliability with a strong demand in functional safety. In principle, self-driving cars are robots. However, typical robot software, in general, and the previous version of the Robot Operating System (ROS), in particular, does not always meet these requirements. With the successor ROS2 the situation has changed and it might be considered as a solution for automated and autonomous driving. Existing robotic software based on ROS was not ready for safety critical applications like self-driving cars. We propose an architecture for using ROS2 for a self-driving car that enables safe and reliable real-time behaviour, but keeping the advantages of ROS such as a distributed architecture and standardised message types. First experiments with an automated real passenger car at lower and higher speed-levels show that our approach seems feasible for autonomous driving under the necessary real-time conditions.}, language = {en} } @article{HarzheimMuehmelHeuermann2021, author = {Harzheim, Thomas and M{\"u}hmel, Marc and Heuermann, Holger}, title = {A SFCW harmonic radar system for maritime search and rescue using passive and active tags}, series = {International Journal of Microwave and Wireless Technologies}, volume = {13}, journal = {International Journal of Microwave and Wireless Technologies}, number = {Special Issue 7}, publisher = {Cambridge University Press}, address = {Cambridge}, doi = {10.1017/S1759078721000520}, pages = {691 -- 707}, year = {2021}, abstract = {This paper introduces a new maritime search and rescue system based on S-band illumination harmonic radar (HR). Passive and active tags have been developed and tested while attached to life jackets and a small boat. In this demonstration test carried out on the Baltic Sea, the system was able to detect and range the active tags up to a distance of 5800 m using an illumination signal transmit-power of 100 W. Special attention is given to the development, performance, and conceptual differences between passive and active tags used in the system. Guidelines for achieving a high HR dynamic range, including a system components description, are given and a comparison with other HR systems is performed. System integration with a commercial maritime X-band navigation radar is shown to demonstrate a solution for rapid search and rescue response and quick localization.}, language = {en} } @article{PrumeBooijVogletal.2007, author = {Prume, Klaus and Booij, W. E. and Vogl, A. H. and Wang, D. T.}, title = {A simple and powerful analytical model for MEMS piezoelectric multimorphs / Booij, W. E. ; Vogl, A. H. ; Wang, D. T. ; Tyholdt, F. ; Ostbo, N. P. ; Raeder, H. ; Prume, K.}, series = {Journal of Electroceramics. 19 (2007), H. 4}, journal = {Journal of Electroceramics. 19 (2007), H. 4}, isbn = {1385-3449}, pages = {387 -- 393}, year = {2007}, language = {en} } @article{FerreinBeckLakemeyer2007, author = {Ferrein, Alexander and Beck, Daniel and Lakemeyer, Gerhard}, title = {A Simulation Environment for Middle-Size Robots with Multi-level Abstraction / Beck, Daniel ; Ferrein, Alexander ; Lakemeyer, Gerhard}, series = {RoboCup 2007: Robot Soccer World Cup XI}, journal = {RoboCup 2007: Robot Soccer World Cup XI}, publisher = {Springer}, address = {Berlin}, isbn = {978-3-540-68846-4}, pages = {136 -- 147}, year = {2007}, language = {en} } @inproceedings{EltesterFerreinSchiffer2020, author = {Eltester, Niklas Sebastian and Ferrein, Alexander and Schiffer, Stefan}, title = {A smart factory setup based on the RoboCup logistics league}, series = {2020 IEEE Conference on Industrial Cyberphysical Systems (ICPS)}, booktitle = {2020 IEEE Conference on Industrial Cyberphysical Systems (ICPS)}, publisher = {IEEE}, address = {New York, NY}, doi = {10.1109/ICPS48405.2020.9274766}, pages = {297 -- 302}, year = {2020}, abstract = {In this paper we present SMART-FACTORY, a setup for a research and teaching facility in industrial robotics that is based on the RoboCup Logistics League. It is driven by the need for developing and applying solutions for digital production. Digitization receives constantly increasing attention in many areas, especially in industry. The common theme is to make things smart by using intelligent computer technology. Especially in the last decade there have been many attempts to improve existing processes in factories, for example, in production logistics, also with deploying cyber-physical systems. An initiative that explores challenges and opportunities for robots in such a setting is the RoboCup Logistics League. Since its foundation in 2012 it is an international effort for research and education in an intra-warehouse logistics scenario. During seven years of competition a lot of knowledge and experience regarding autonomous robots was gained. This knowledge and experience shall provide the basis for further research in challenges of future production. The focus of our SMART-FACTORY is to create a stimulating environment for research on logistics robotics, for teaching activities in computer science and electrical engineering programmes as well as for industrial users to study and explore the feasibility of future technologies. Building on a very successful history in the RoboCup Logistics League we aim to provide stakeholders with a dedicated facility oriented at their individual needs.}, language = {en} } @book{FassbenderManeth1996, author = {Faßbender, Heinz and Maneth, Sebastian}, title = {A strict border for the decidability of e-unification for recursive functions}, publisher = {TU, Fak. Informatik}, address = {Dresden}, pages = {27 S. : graph. Darst.}, year = {1996}, language = {en} } @article{FassbenderManeth1998, author = {Faßbender, Heinz and Maneth, Sebastian}, title = {A strict border for the decidability of e-unification for recursive functions / Faßbender, Heinz ; Maneth, Sebastian}, series = {Journal of functional and logic programming. 1998 (1998), H. 4}, journal = {Journal of functional and logic programming. 1998 (1998), H. 4}, isbn = {1080-5230}, year = {1998}, language = {en} } @article{FassbenderManeth1996, author = {Faßbender, Heinz and Maneth, Sebastian}, title = {A strict border for the decidability of e-unification for recursive functions / Faßbender, Heinz ; Maneth, Sebastian}, series = {Algebraic and logic programming : proceedings / 5th International Conference, ALP '96, Aachen, Germany, September 25 - 27, 1996. Michael Hanus ... (ed.)}, journal = {Algebraic and logic programming : proceedings / 5th International Conference, ALP '96, Aachen, Germany, September 25 - 27, 1996. Michael Hanus ... (ed.)}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-61735-3}, pages = {194 -- 208}, year = {1996}, language = {en} } @article{Heuermann2004, author = {Heuermann, Holger}, title = {A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter}, series = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1}, journal = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1}, publisher = {Horizon House Publ}, address = {London}, isbn = {1-580-53992-0}, pages = {309 -- 312}, year = {2004}, language = {en} } @inproceedings{FerreinSchollNeumannetal.2019, author = {Ferrein, Alexander and Scholl, Ingrid and Neumann, Tobias and Kr{\"u}ckel, Kai and Schiffer, Stefan}, title = {A system for continuous underground site mapping and exploration}, doi = {10.5772/intechopen.85859}, pages = {16 Seiten}, year = {2019}, language = {en} } @article{KobFrauenrath2009, author = {Kob, Malte and Frauenrath, Tobias}, title = {A system for parallel measurement of glottis opening and larynx position}, series = {Biomedical Signal Processing and Control}, volume = {4}, journal = {Biomedical Signal Processing and Control}, number = {3}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1746-8108}, doi = {10.1016/j.bspc.2009.03.004}, pages = {221 -- 228}, year = {2009}, abstract = {The simultaneous assessment of glottal dynamics and larynx position can be beneficial for the diagnosis of disordered voice or speech production and swallowing. Up to now, methods either concentrate on assessment of the glottis opening using optical, acoustical or electrical (electroglottography, EGG) methods, or on visualisation of the larynx position using ultrasound, computer tomography or magnetic resonance imaging techniques. The method presented here makes use of a time-multiplex measurement approach of space-resolved transfer impedances through the larynx. The fast sequence of measurements allows a quasi simultaneous assessment of both larynx position and EGG signal using up to 32 transmit-receive signal paths. The system assesses the dynamic opening status of the glottis as well as the vertical and back/forward motion of the larynx. Two electrode-arrays are used for the measurement of the electrical transfer impedance through the neck in different directions. From the acquired data the global and individual conductivity is calculated as well as a 2D point spatial representation of the minimum impedance. The position information is shown together with classical EGG signals allowing a synchronous visual assessment of glottal area and larynx position. A first application to singing voice analysis is presented that indicate a high potential of the method for use as a non-invasive tool in the diagnosis of voice, speech, and swallowing disorders.}, language = {en} } @inproceedings{SchifferFerrein2017, author = {Schiffer, Stefan and Ferrein, Alexander}, title = {A System Layout for Cognitive Service Robots}, series = {Cognitive Robot Architectures. Proceedings of EUCognition 2016}, booktitle = {Cognitive Robot Architectures. Proceedings of EUCognition 2016}, issn = {1613-0073}, pages = {44 -- 45}, year = {2017}, language = {en} } @article{KraffBitzBreyeretal.2011, author = {Kraff, Oliver and Bitz, Andreas and Breyer, Tobias and Kruszona, Stefan and Maderwald, Stefan and Brote, Irina and Gizewski, Elke R. and Ladd, Mark E. and Quick, Harald H.}, title = {A transmit/receive radiofrequency array for imaging the carotid arteries at 7 Tesla: coil design and first in vivo results}, series = {Investigative Radiology}, volume = {46}, journal = {Investigative Radiology}, number = {4}, publisher = {Wolters Kluwer}, address = {K{\"o}ln}, issn = {1536-0210}, doi = {10.1097/RLI.0b013e318206cee4}, pages = {246 -- 254}, year = {2011}, abstract = {Objective: To develop a transmit/receive radiofrequency (RF) array for magnetic resonance imaging (MRI) of the carotid arteries at 7 T. The prototype is characterized in numerical simulations and bench measurements, and the feasibility of plaque imaging at 7 T is demonstrated in first in vivo images. Materials and Methods: The RF phased array coil consists of 8 surface loop coils. To allow imaging of both sides of the neck, the RF array is divided into 2 coil clusters, each with 4 overlapping loop elements. For safety validation, numerical computations of the RF field distribution and the corresponding specific absorption rate were performed on the basis of a heterogeneous human body model. To validate the coil model, maps of the transmit B1+ field were compared between simulation and measurement. In vivo images of a healthy volunteer and a patient (ulcerating plaque and a 50\% stenosis of the right internal carotid artery) were acquired using a 3-dimensional FLASH sequence with a high isotropic spatial resolution of 0.54 mm as well as using pulse-triggered proton density (PD)/T2-weighted turbo spin echo sequences. Results: Measurements of the S-parameters yielded a reflection and isolation of the coil elements of better than -18 and -13 dB, respectively. Measurements of the g-factor indicated good image quality for parallel imaging acceleration factors up to 2.4. A similar distribution and a very good match of the absolute values were found between the measured and simulated B1+ transmit RF field for the validation of the coil model. In vivo images revealed good signal excitation of both sides of the neck and a high vessel-to-background image contrast for the noncontrast-enhanced 3-dimensional FLASH sequence. Imaging at 7 T could depict the extent of stenosis, and revealed the disruption and ulcer of the plaque. Conclusions: This study demonstrates that 2 four-channel transmit/receive RF arrays for each side of the neck is a suitable concept for in vivo MRI of the carotid arteries at 7 Tesla. Further studies are needed to explore and exploit the full potential of 7 T high-field MRI for carotid atherosclerotic plaque imaging.}, language = {en} } @book{FassbenderVogler1992, author = {Faßbender, Heinz and Vogler, Heiko}, title = {A universal unification algorithm based on unification driven leftmost outermost narrowing}, publisher = {Univ. Ulm, Fak. f{\"u}r Informatik}, address = {Ulm}, pages = {47 S. : graph. Darst.}, year = {1992}, language = {en} } @article{FassbenderVogler1994, author = {Faßbender, Heinz and Vogler, Heiko}, title = {A universal unification algorithm based on unification-driven leftmost outermost narrowing}, series = {Acta Cybernetica. 11 (1994), H. 3}, journal = {Acta Cybernetica. 11 (1994), H. 3}, isbn = {0324-721x}, pages = {139 -- 167}, year = {1994}, language = {en} } @article{Fassbender1995, author = {Faßbender, Heinz}, title = {A verified implementation of narrowing}, series = {Programming languages: implementations, logics and programs : proceedings / 7th International Symposium, PLILP '95, Utrecht, The Netherlands, September 20 - 22, 1995. Manuel Hermenegildo ... (ed.)}, journal = {Programming languages: implementations, logics and programs : proceedings / 7th International Symposium, PLILP '95, Utrecht, The Netherlands, September 20 - 22, 1995. Manuel Hermenegildo ... (ed.)}, publisher = {Springer}, address = {Berlin [u.a.]}, isbn = {3-540-60359-X}, pages = {63 -- 80}, year = {1995}, language = {en} } @inproceedings{BitzAlaydrusStreckertetal.2002, author = {Bitz, Andreas and Alaydrus, M. and Streckert, J. and Hansen, V.W.}, title = {Absorption rates inside human body due to radiated electro-magnetic fields of multi-band base station antennas. Boundary value problems with electrically large and high-resolution bodies}, series = {24th BEMS Annual Meeting, Quebec City, Quebec, Canada, 23 - 27 June 2002}, booktitle = {24th BEMS Annual Meeting, Quebec City, Quebec, Canada, 23 - 27 June 2002}, publisher = {Bioelectromagnetics Society}, address = {Frederick, MD}, pages = {40 -- 41}, year = {2002}, language = {en} } @article{SchifferFerreinLakemeyer2015, author = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {Abstracting Away Low-Level Details in Service Robotics with Fuzzy Fluents}, series = {Model-Driven Knowledge Engineering for Improved Software Modularity in Robotics and Automation. Workshop at European Robotics Forum 2015 Vienna, Austria, March 11-13, 2015.}, journal = {Model-Driven Knowledge Engineering for Improved Software Modularity in Robotics and Automation. Workshop at European Robotics Forum 2015 Vienna, Austria, March 11-13, 2015.}, pages = {1 -- 4}, year = {2015}, language = {en} } @article{FrauenrathHezelRenzetal.2010, author = {Frauenrath, Tobias and Hezel, Fabian and Renz, Wolfgang and de Geyer d'Orth, Thibaut and Dieringer, Matthias and von Knobelsdorf-Brenkenhoff, Florian and Prothmann, Marcel and Schulz-Menger, Jeanette and Niendorf, Thoralf}, title = {Acoustic cardiac triggering: a practical solution for synchronization and gating of cardiovascular magnetic resonance at 7 Tesla}, series = {Journal of Cardiovascular Magnetic Resonance}, volume = {12}, journal = {Journal of Cardiovascular Magnetic Resonance}, number = {1}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1532-429X}, doi = {10.1186/1532-429X-12-67}, year = {2010}, abstract = {Background To demonstrate the applicability of acoustic cardiac triggering (ACT) for imaging of the heart at ultrahigh magnetic fields (7.0 T) by comparing phonocardiogram, conventional vector electrocardiogram (ECG) and traditional pulse oximetry (POX) triggered 2D CINE acquisitions together with (i) a qualitative image quality analysis, (ii) an assessment of the left ventricular function parameter and (iii) an examination of trigger reliability and trigger detection variance derived from the signal waveforms. Results ECG was susceptible to severe distortions at 7.0 T. POX and ACT provided waveforms free of interferences from electromagnetic fields or from magneto-hydrodynamic effects. Frequent R-wave mis-registration occurred in ECG-triggered acquisitions with a failure rate of up to 30\% resulting in cardiac motion induced artifacts. ACT and POX triggering produced images free of cardiac motion artefacts. ECG showed a severe jitter in the R-wave detection. POX also showed a trigger jitter of approximately Δt = 72 ms which is equivalent to two cardiac phases. ACT showed a jitter of approximately Δt = 5 ms only. ECG waveforms revealed a standard deviation for the cardiac trigger offset larger than that observed for ACT or POX waveforms. Image quality assessment showed that ACT substantially improved image quality as compared to ECG (image quality score at end-diastole: ECG = 1.7 ± 0.5, ACT = 2.4 ± 0.5, p = 0.04) while the comparison between ECG vs. POX gated acquisitions showed no significant differences in image quality (image quality score: ECG = 1.7 ± 0.5, POX = 2.0 ± 0.5, p = 0.34). Conclusions The applicability of acoustic triggering for cardiac CINE imaging at 7.0 T was demonstrated. ACT's trigger reliability and fidelity are superior to that of ECG and POX. ACT promises to be beneficial for cardiovascular magnetic resonance at ultra-high field strengths including 7.0 T.}, language = {en} } @article{FrauenrathNiendorfKob2008, author = {Frauenrath, Tobias and Niendorf, Thoralf and Kob, Malte}, title = {Acoustic method for synchronization of Magnetic Resonance Imaging (MRI)}, series = {Acta Acustica}, volume = {94}, journal = {Acta Acustica}, number = {1}, publisher = {Hirzel}, address = {Stuttgart}, issn = {1861-9959}, doi = {10.3813/AAA.918017}, pages = {148 -- 155}, year = {2008}, abstract = {Magnetic Resonance Imaging (MRI) of moving organs requires synchronization with physiological motion or flow, which dictate the viable window for data acquisition. To meet this challenge, this study proposes an acoustic gating device (ACG) that employs acquisition and processing of acoustic signals for synchronization while providing MRI compatibility, immunity to interferences with electro-magnetic and acoustic fields and suitability for MRI at high magnetic field strengths. The applicability and robustness of the acoustic gating approach is examined in a pilot study, where it substitutes conventional ECG-gating for cardiovascular MR. The merits and limitations of the ACG approach are discussed. Implications for MR imaging in the presence of physiological motion are considered including synchronization with other structure- or motion borne sounds.}, language = {en} } @article{FerreinDyllaLakemeyer2002, author = {Ferrein, Alexander and Dylla, Frank and Lakemeyer, Gerhard}, title = {Acting and Deliberating using Golog in Robotic Soccer - A Hybrid Architecture / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard}, series = {Proc. 3rd International Cognitive Robotics Workshop (CogRob 2002)}, journal = {Proc. 3rd International Cognitive Robotics Workshop (CogRob 2002)}, pages = {1 -- 7}, year = {2002}, language = {en} } @article{FerreinSteinbauerVassos2012, author = {Ferrein, Alexander and Steinbauer, Gerald and Vassos, Stavros}, title = {Action-Based Imperative Programming with YAGI}, pages = {24 -- 31}, year = {2012}, abstract = {Many tasks for autonomous agents or robots are best described by a specification of the environment and a specification of the available actions the agent or robot can perform. Combining such a specification with the possibility to imperatively program a robot or agent is what we call the actionbased imperative programming. One of the most successful such approaches is Golog. In this paper, we draft a proposal for a new robot programming language YAGI, which is based on the action-based imperative programming paradigm. Our goal is to design a small, portable stand-alone YAGI interpreter. We combine the benefits of a principled domain specification with a clean, small and simple programming language, which does not exploit any side-effects from the implementation language. We discuss general requirements of action-based programming languages and outline YAGI, our action-based language approach which particularly aims at embeddability.}, language = {en} } @inproceedings{DammRitzStrauch2011, author = {Damm, Sebastian and Ritz, Thomas and Strauch, Jakob}, title = {Adaption of archetype patterns for mobile cloud-based business apps}, series = {2011 IEEE International Conference on Pervasive Computing and Communications workshops (PerCom workshops 2011) : Seattle, Washington, USA, 21 - 25 March 2011}, booktitle = {2011 IEEE International Conference on Pervasive Computing and Communications workshops (PerCom workshops 2011) : Seattle, Washington, USA, 21 - 25 March 2011}, publisher = {IEEE Service Center}, address = {Piscataway, NJ}, isbn = {978-1-61284-938-6 (Print)}, doi = {10.1109/PERCOMW.2011.5766849}, pages = {100 -- 105}, year = {2011}, language = {en} } @inproceedings{GebhardtRitzSiekmannetal.2014, author = {Gebhardt, Andreas and Ritz, Thomas and Siekmann, Kirsten and Wallenborn, Ramona}, title = {Additive manufacturing businesses in the process chain of individualized mass products}, series = {DDMC 2014 : Proceedings of the Fraunhofer Direct Digital Manufacturing Conference}, booktitle = {DDMC 2014 : Proceedings of the Fraunhofer Direct Digital Manufacturing Conference}, editor = {Demmer, Axel}, publisher = {Fraunhofer}, address = {Stuttgart}, isbn = {978-3-8396-9128-1 (E-Book)}, year = {2014}, language = {en} } @article{HeuermannRumiantsevSchott2004, author = {Heuermann, Holger and Rumiantsev, A. and Schott, S.}, title = {Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization}, series = {On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns]}, journal = {On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns]}, publisher = {IEEE Operations Center}, address = {Piscataway, NJ}, isbn = {0-7803-8371-0}, pages = {91 -- 96}, year = {2004}, language = {en} } @article{DesernoAachAmuntsetal.2011, author = {Deserno, Thomas M. and Aach, Til and Amunts, Katrin and Hillen, Walter and Kuhlen, Torsten and Scholl, Ingrid}, title = {Advances in medical image processing : A special Issue on the Workshop in Aachen, Germany, March 2010}, series = {Computer Science - Research and Development. 26 (2011), H. 1-2}, journal = {Computer Science - Research and Development. 26 (2011), H. 1-2}, publisher = {springer}, address = {Berlin}, isbn = {1865-2042}, pages = {1 -- 3}, year = {2011}, language = {en} } @article{HartungNiebertSchiederetal.2006, author = {Hartung, Frank and Niebert, Norbert and Schieder, Andreas and Rembarz, Ren{\´e}}, title = {Advances in network-supported media delivery in next-generation mobile systems / Hartung, Frank ; Niebert, Norbert ; Schieder, Andreas ; Rembarz, Ren{\´e} ; Schmid, Stefan ; Eggert, Lars}, series = {IEEE Communications Magazine. 44 (2006), H. 8}, journal = {IEEE Communications Magazine. 44 (2006), H. 8}, isbn = {0163-6804}, pages = {82 -- 89}, year = {2006}, language = {en} } @inproceedings{MarcoFerrein2017, author = {Marco, Heather G. and Ferrein, Alexander}, title = {AGNES: The African-German Network of Excellence in Science}, series = {Proceedings of the 2nd Developing World Robotics Forum, Workshop at IEEE AFRICON 2017}, booktitle = {Proceedings of the 2nd Developing World Robotics Forum, Workshop at IEEE AFRICON 2017}, pages = {1 -- 2}, year = {2017}, language = {en} } @inproceedings{GligorevicZierhutJostetal.2009, author = {Gligorevic, Snjezana and Zierhut, R. and Jost, T. and Wang, Wei}, title = {Airport channel measurements at 5.2GHz}, series = {3rd European Conference on Antennas and Propagation : (EuCAP) ; Berlin, Germany, 23 - 27 March 2009}, booktitle = {3rd European Conference on Antennas and Propagation : (EuCAP) ; Berlin, Germany, 23 - 27 March 2009}, organization = {European Conference on Antennas and Propagation <3, 2009, Berlin>}, isbn = {978-1-4244-4753-4 ; 978-3-00-024573-2}, pages = {877 -- 881}, year = {2009}, language = {en} } @article{Gligorevic2013, author = {Gligorevic, Snjezana}, title = {Airport surface propagation channel in the C-Band: measurements and modeling}, series = {IEEE transactions on antennas and propagation}, volume = {Vol. 61}, journal = {IEEE transactions on antennas and propagation}, number = {Iss. 9}, publisher = {IEEE}, address = {New York}, issn = {0018-926x}, pages = {4792 -- 4802}, year = {2013}, language = {en} } @article{AltherrLeisePfetschetal.2018, author = {Altherr, Lena and Leise, Philipp and Pfetsch, Marc E. and Schmitt, Andreas}, title = {Algorithmic design and resilience assessment of energy efficient high-rise water supply systems}, series = {Applied Mechanics and Materials}, volume = {885}, journal = {Applied Mechanics and Materials}, publisher = {Trans Tech Publications}, address = {B{\"a}ch}, issn = {1662-7482}, doi = {10.4028/www.scientific.net/AMM.885.211}, pages = {211 -- 223}, year = {2018}, abstract = {High-rise water supply systems provide water flow and suitable pressure in all levels of tall buildings. To design such state-of-the-art systems, the consideration of energy efficiency and the anticipation of component failures are mandatory. In this paper, we use Mixed-Integer Nonlinear Programming to compute an optimal placement of pipes and pumps, as well as an optimal control strategy.Moreover, we consider the resilience of the system to pump failures. A resilient system is able to fulfill a predefined minimum functionality even though components fail or are restricted in their normal usage. We present models to measure and optimize the resilience. To demonstrate our approach, we design and analyze an optimal resilient decentralized water supply system inspired by a real-life hotel building.}, language = {en} } @book{Altherr2016, author = {Altherr, Lena}, title = {Algorithmic System Design under Consideration of Dynamic Processes}, publisher = {Shaker}, address = {Aachen}, isbn = {978-3-8440-4848-3}, pages = {94}, year = {2016}, abstract = {Nach Stand von Wissenschaft und Technik werden Komponenten hinsichtlich ihrer Eigenschaften, wie Lebensdauer oder Energieeffizienz, optimiert. Allerdings k{\"o}nnen selbst hervorragende Komponenten zu ineffizienten oder instabilen Systemen f{\"u}hren, wenn ihr Zusammenspiel nur unzureichend ber{\"u}cksichtigt wird. Eine Systembetrachtung schafft ein gr{\"o}ßeres Optimierungspotential - dem erh{\"o}hten Potential steht jedoch auch ein erh{\"o}hter Komplexit{\"a}tsgrad gegen{\"u}ber. Die vorliegende Arbeit ist im Rahmen des Sonderforschungsbereichs 805 entstanden, dessen Ziel die Beherrschung von Unsicherheit in Systemen des Maschinenbaus ist. Die Arbeit zeigt anhand eines realen Systems aus dem Bereich der Hydraulik, wie Unsicherheit in der Entwicklungsphase beherrscht werden kann. Hierbei ist neu, dass die durch den sp{\"a}teren Betrieb zu erwartende Systemdegradation eines jeden m{\"o}glichen Systemvorschlags antizipiert werden kann. Dadurch k{\"o}nnen Betriebs- und Wartungskosten vorausgesagt und minimiert werden und durch eine optimale Betriebs- und Wartungsstrategie die Verf{\"u}gbarkeit des Systems garantiert werden. Wesentliche Fragen bei der optimalen Auslegung des betrachteten hydrostatischen Getriebes sind dessen physikalische Modellierung, die Darstellung des Optimierungsproblems als gemischt-ganzzahliges lineares Programm, und dessen algorithmische Behandlung zur L{\"o}sungsfindung. Hierzu werden Heuristiken zum schnelleren Auffinden sinnvoller Systemtopologien vorgestellt und mittels mathematischer Dekomposition eine Bewertung des dynamischen Verschleiß- und Wartungsverlaufs m{\"o}glicher Systemvorschl{\"a}ge vorgenommen. Die Arbeit stellt die Optimierung technischer Systeme an der Schnittstelle von Mathematik, Informatik und Ingenieurwesen sowohl gr{\"u}ndlich als auch anschaulich und nachvollziehbar dar.}, language = {en} } @inproceedings{AltherrEdererSchaenzleetal.2017, author = {Altherr, Lena and Ederer, Thorsten and Sch{\"a}nzle, Christian and Lorenz, Ulf and Pelz, Peter F.}, title = {Algorithmic system design using scaling and affinity laws}, series = {Operations Research Proceedings 2015}, booktitle = {Operations Research Proceedings 2015}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-42901-4}, doi = {10.1007/978-3-319-42902-1}, pages = {605 -- 611}, year = {2017}, abstract = {Energy-efficient components do not automatically lead to energy-efficient systems. Technical Operations Research (TOR) shifts the focus from the single component to the system as a whole and finds its optimal topology and operating strategy simultaneously. In previous works, we provided a preselected construction kit of suitable components for the algorithm. This approach may give rise to a combinatorial explosion if the preselection cannot be cut down to a reasonable number by human intuition. To reduce the number of discrete decisions, we integrate laws derived from similarity theory into the optimization model. Since the physical characteristics of a production series are similar, it can be described by affinity and scaling laws. Making use of these laws, our construction kit can be modeled more efficiently: Instead of a preselection of components, it now encompasses whole model ranges. This allows us to significantly increase the number of possible set-ups in our model. In this paper, we present how to embed this new formulation into a mixed-integer program and assess the run time via benchmarks. We present our approach on the example of a ventilation system design problem.}, language = {en} } @inproceedings{DyllaFerreinLakemeyer2003, author = {Dylla, Frank and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {AllemaniACs 2003 team description}, series = {RoboCup 2003 : Robot Soccer World Cup VII}, booktitle = {RoboCup 2003 : Robot Soccer World Cup VII}, pages = {1 -- 3}, year = {2003}, language = {en} } @article{VorstFerreinLakemeyer2006, author = {Vorst, Phillip and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {AllemaniACs3D team description}, pages = {1 -- 6}, year = {2006}, language = {en} } @inproceedings{FerreinLakemeyerSchiffer2006, author = {Ferrein, Alexander and Lakemeyer, Gerhard and Schiffer, Stefan}, title = {AllemaniACs@ home 2006 team description}, pages = {1 -- 6}, year = {2006}, language = {en} } @inproceedings{HeuermannSadeghfamFinger2013, author = {Heuermann, Holger and Sadeghfam, Arash and Finger, Torsten}, title = {Alternative ignition system based on microwave plasma}, series = {Advanced ignition systems for gasoline engines : [Vortr{\"a}ge der 1st International Conference Advanced Ignition Systems for Gasoline Engines - 1. Internationale Tagung Z{\"u}ndsysteme f{\"u}r Ottomotoren, 12.-13. November 2012, Berlin]}, booktitle = {Advanced ignition systems for gasoline engines : [Vortr{\"a}ge der 1st International Conference Advanced Ignition Systems for Gasoline Engines - 1. Internationale Tagung Z{\"u}ndsysteme f{\"u}r Ottomotoren, 12.-13. November 2012, Berlin]}, publisher = {Expert-Verl.}, address = {Renningen}, organization = {International Conference Advanced Ignition Systems for Gasoline Engines <1, 2012, Berlin>}, isbn = {9783816931904}, pages = {95 -- 103}, year = {2013}, language = {en} } @article{RietschPfaffenrotBitzetal.2017, author = {Rietsch, Stefan H. G. and Pfaffenrot, Viktor and Bitz, Andreas and Orzada, Stephan and Brunheim, Sascha and Lazik-Palm, Andrea and Theysohn, Jens M. and Ladd, Mark E. and Quick, Harald H. and Kraff, Oliver}, title = {An 8-channel transceiver 7-channel receive RF coil setup for high SNR ultrahigh-field MRI of the shoulder at 7T}, series = {Medical Physics}, journal = {Medical Physics}, number = {Article in press}, publisher = {Wiley}, address = {Hoboken}, issn = {0094-2405}, doi = {10.1002/mp.12612}, year = {2017}, language = {en} } @article{FassbenderVoglerWedel1993, author = {Faßbender, Heinz and Vogler, Heiko and Wedel, Andrea}, title = {An abstract machine for the E-Unification with macro tree transducer}, series = {7th International Workshop on Unification : 13. 06. - 14. 06. 93 / Franz Baader ... (eds.). [Boston University, Boston, USA]}, journal = {7th International Workshop on Unification : 13. 06. - 14. 06. 93 / Franz Baader ... (eds.). [Boston University, Boston, USA]}, year = {1993}, language = {en} } @inproceedings{HarzheimHeuermannMarso2016, author = {Harzheim, Thomas and Heuermann, Holger and Marso, Michel}, title = {An Adaptive Biasing Method for SRD Comb Generators}, series = {2016 German Microwave Conference (GeMiC)}, booktitle = {2016 German Microwave Conference (GeMiC)}, publisher = {IEEE}, doi = {10.1109/GEMIC.2016.7461613}, pages = {289 -- 292}, year = {2016}, language = {en} } @article{SchubaReichl1998, author = {Schuba, Marko and Reichl, Peter}, title = {An Analysis of Retransmission Strategies for Reliable Multicast Protocols / Schuba, M. ; Reichl, P.}, series = {Performance of information and communication systems : IFIP TC 6,WG 6.3 Seventh International Conference on Performance of Information and Communication Systems (PICS '98), 25 - 28 May, Lund, Sweden / ed. by Ulf K{\"o}rner ...}, journal = {Performance of information and communication systems : IFIP TC 6,WG 6.3 Seventh International Conference on Performance of Information and Communication Systems (PICS '98), 25 - 28 May, Lund, Sweden / ed. by Ulf K{\"o}rner ...}, publisher = {Chapman Hall}, address = {London}, isbn = {0-412-83730-7}, pages = {1 -- 12}, year = {1998}, language = {en} } @incollection{RaoPathroseHueningetal.2019, author = {Rao, Deepak and Pathrose, Plato and H{\"u}ning, Felix and Sid, Jithin}, title = {An Approach for Validating Safety of Perception Software in Autonomous Driving Systems}, series = {Model-Based Safety and Assessment: 6th International Symposium, IMBSA 2019, Thessaloniki, Greece, October 16-18, 2019, Proceedings}, booktitle = {Model-Based Safety and Assessment: 6th International Symposium, IMBSA 2019, Thessaloniki, Greece, October 16-18, 2019, Proceedings}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-32872-6}, doi = {10.1007/978-3-030-32872-6_20}, pages = {303 -- 316}, year = {2019}, abstract = {The increasing complexity of Advanced Driver Assistance Systems (ADAS) presents a challenging task to validate safe and reliable performance of these systems under varied conditions. The test and validation of ADAS/AD with real test drives, although important, involves huge costs and time. Simulation tools provide an alternative with the added advantage of reproducibility but often use ideal sensors, which do not reflect real sensor output accurately. This paper presents a new validation methodology using fault injection, as recommended by the ISO 26262 standard, to test software and system robustness. In our work, we investigated and developed a tool capable of inserting faults at different software and system levels to verify its robustness. The scope of this paper is to cover the fault injection test for the Visteon's DriveCore™ system, a centralized domain controller for Autonomous driving which is sensor agnostic and SoC agnostic. With this new approach, the validation of safety monitoring functionality and its behavior can be tested using real-world data instead of synthetic data from simulation tools resulting in having better confidence in system performance before proceeding with in-vehicle testing.}, language = {en} } @inproceedings{FingerKhalsaKreyeretal.2019, author = {Finger, Felix and Khalsa, R. and Kreyer, J{\"o}rg and Mayntz, Joscha and Braun, Carsten and Dahmann, Peter and Esch, Thomas and Kemper, Hans and Schmitz, O. and Bragard, Michael}, title = {An approach to propulsion system modelling for the conceptual design of hybrid-electric general aviation aircraft}, series = {Deutscher Luft- und Raumfahrtkongress 2019, 30.9.-2.10.2019, Darmstadt}, booktitle = {Deutscher Luft- und Raumfahrtkongress 2019, 30.9.-2.10.2019, Darmstadt}, pages = {15 Seiten}, year = {2019}, abstract = {In this paper, an approach to propulsion system modelling for hybrid-electric general aviation aircraft is presented. Because the focus is on general aviation aircraft, only combinations of electric motors and reciprocating combustion engines are explored. Gas turbine hybrids will not be considered. The level of the component's models is appropriate for the conceptual design stage. They are simple and adaptable, so that a wide range of designs with morphologically different propulsive system architectures can be quickly compared. Modelling strategies for both mass and efficiency of each part of the propulsion system (engine, motor, battery and propeller) will be presented.}, language = {en} } @inproceedings{AlhwarinFerreinScholl2019, author = {Alhwarin, Faraj and Ferrein, Alexander and Scholl, Ingrid}, title = {An Efficient Hashing Algorithm for NN Problem in HD Spaces}, series = {Lecture Notes in Computer Science}, booktitle = {Lecture Notes in Computer Science}, isbn = {978-303005498-4}, doi = {10.1007/978-3-030-05499-1_6}, pages = {101 -- 115}, year = {2019}, language = {en} } @article{KraffBitzKruszonaetal.2009, author = {Kraff, Oliver and Bitz, Andreas and Kruszona, Stefan and Orzada, Stephan and Schaefer, Lena C. and Theysohn, Jens M. and Maderwald, Stefan and Ladd, Mark E. and Quick, Harald H.}, title = {An eight-channel phased array RF coil for spine MR imaging at 7 T}, series = {Investigative Radiology}, volume = {44}, journal = {Investigative Radiology}, number = {11}, publisher = {Lippincott Williams \& Wilkins}, issn = {1536-0210}, doi = {10.1097/RLI.0b013e3181b24ab7}, pages = {734 -- 740}, year = {2009}, language = {en} } @article{KraffBitzDammannetal.2010, author = {Kraff, Oliver and Bitz, Andreas and Dammann, Philipp and Ladd, Susanne C. and Ladd, Mark E. and Quick, Harald H.}, title = {An eight-channel transmit/receive multipurpose coil for musculoskeletal MR imaging at 7 T}, series = {Medical Physics}, volume = {37}, journal = {Medical Physics}, number = {12}, publisher = {Wiley}, address = {Hoboken, NJ}, issn = {2473-4209}, doi = {10.1118/1.3517176}, pages = {6368 -- 6376}, year = {2010}, abstract = {Purpose: MRI plays a leading diagnostic role in assessing the musculoskeletal (MSK) system and is well established for most questions at clinically used field strengths (up to 3 T). However, there are still limitations in imaging early stages of cartilage degeneration, very fine tendons and ligaments, or in locating nerve lesions, for example. 7 T MRI of the knee has already received increasing attention in the current published literature, but there is a strong need to develop new radiofrequency (RF) coils to assess more regions of the MSK system. In this work, an eight-channel transmit/receive RF array was built as a multipurpose coil for imaging some of the thus far neglected regions. An extensive coil characterization protocol and first in vivo results of the human wrist, shoulder, elbow, knee, and ankle imaged at 7 T will be presented. Methods: Eight surface loop coils with a dimension ofurn:x-wiley:00942405:media:mp7176:mp7176-math-0001 were machined from FR4 circuit board material. To facilitate easy positioning, two coil clusters, each with four loop elements, were combined to one RF transmit/receive array. An overlapped and shifted arrangement of the coil elements was chosen to reduce the mutual inductance between neighboring coils. A phantom made of body-simulating liquid was used for tuning and matching on the bench. Afterward, the S-parameters were verified on a human wrist, elbow, and shoulder. For safety validation, a detailed compliance test was performed including full wave simulations of the RF field distribution and the corresponding specific absorption rate (SAR) for all joints. In vivo images of four volunteers were assessed with gradient echo and spin echo sequences modified to obtain optimal image contrast, full anatomic coverage, and the highest spatial resolution within a reasonable acquisition time. The performance of the RF coil was additionally evaluated by in vivo B1 mapping. Results: A comparison of B1 per unit power, flip angle distribution, and anatomic images showed a fairly homogeneous excitation for the smaller joints (elbow, wrist, and ankle), while for the larger joints, the shoulder and especially the knee, B1 inhomogeneities and limited penetration depth were more pronounced. However, the greater part of the shoulder joint could be imaged.In vivo images rendered very fine anatomic details such as fascicles of the median nerve and the branching of the nerve bundles. High-resolution images of cartilage, labrum, and tendons could be acquired. Additionally, turbo spin echo (TSE) and inversion recovery sequences performed very well. Conclusions: This study demonstrates that the concept of two four-channel transmit/receive RF arrays can be used as a multipurpose coil for high-resolutionin vivo MR imaging of the musculoskeletal system at 7 T. Not only gradient echo but also typical clinical and SAR-intensive sequences such as STIR and TSE performed well. Imaging of small structures and peripheral nerves could in particular benefit from this technique.}, language = {en} } @article{FassbenderBuehler2002, author = {Faßbender, Heinz and B{\"u}hler, Gerhard}, title = {An experimental command and control information system based on Enterprise Java bean technology}, series = {Proceedings of the 7th International Command and Control Research and Technology Symposium, September 2002, Quebec City, Kanada}, journal = {Proceedings of the 7th International Command and Control Research and Technology Symposium, September 2002, Quebec City, Kanada}, pages = {1 -- 8}, year = {2002}, language = {en} } @inproceedings{SchubaHoefkenLinzbach2022, author = {Schuba, Marko and H{\"o}fken, Hans-Wilhelm and Linzbach, Sophie}, title = {An ICS Honeynet for Detecting and Analyzing Cyberattacks in Industrial Plants}, series = {2021 International Conference on Electrical, Computer and Energy Technologies (ICECET)}, booktitle = {2021 International Conference on Electrical, Computer and Energy Technologies (ICECET)}, publisher = {IEEE}, isbn = {978-1-6654-4231-2}, doi = {10.1109/ICECET52533.2021.9698746}, pages = {6 Seiten}, year = {2022}, abstract = {Cybersecurity of Industrial Control Systems (ICS) is an important issue, as ICS incidents may have a direct impact on safety of people or the environment. At the same time the awareness and knowledge about cybersecurity, particularly in the context of ICS, is alarmingly low. Industrial honeypots offer a cheap and easy to implement way to raise cybersecurity awareness and to educate ICS staff about typical attack patterns. When integrated in a productive network, industrial honeypots may not only reveal attackers early but may also distract them from the actual important systems of the network. Implementing multiple honeypots as a honeynet, the systems can be used to emulate or simulate a whole Industrial Control System. This paper describes a network of honeypots emulating HTTP, SNMP, S7communication and the Modbus protocol using Conpot, IMUNES and SNAP7. The nodes mimic SIMATIC S7 programmable logic controllers (PLCs) which are widely used across the globe. The deployed honeypots' features will be compared with the features of real SIMATIC S7 PLCs. Furthermore, the honeynet has been made publicly available for ten days and occurring cyberattacks have been analyzed}, language = {en} } @article{FassbenderVogler1992, author = {Faßbender, Heinz and Vogler, Heiko}, title = {An implementation of syntax directed functional programming on nested-stack machines}, series = {Formal Aspects of Computing. 4 (1992), H. 4}, journal = {Formal Aspects of Computing. 4 (1992), H. 4}, isbn = {0934-5043}, pages = {341 -- 375}, year = {1992}, language = {en} } @article{KowalewskiBragardHueningetal.2023, author = {Kowalewski, Paul and Bragard, Michael and H{\"u}ning, Felix and De Doncker, Rik W.}, title = {An inexpensive Wiegand-sensor-based rotary encoder without rotating magnets for use in electrical drives}, series = {IEEE Transactions on Instrumentation and Measurement}, journal = {IEEE Transactions on Instrumentation and Measurement}, publisher = {IEEE}, issn = {0018-9456 (Print)}, doi = {10.1109/TIM.2023.3326166}, pages = {10 Seiten}, year = {2023}, abstract = {This paper introduces an inexpensive Wiegand-sensor-based rotary encoder that avoids rotating magnets and is suitable for electrical-drive applications. So far, Wiegand-sensor-based encoders usually include a magnetic pole wheel with rotating permanent magnets. These encoders combine the disadvantages of an increased magnet demand and a limited maximal speed due to the centripetal force acting on the rotating magnets. The proposed approach reduces the total demand of permanent magnets drastically. Moreover, the rotating part is manufacturable from a single piece of steel, which makes it very robust and cheap. This work presents the theoretical operating principle of the proposed approach and validates its benefits on a hardware prototype. The presented proof-of-concept prototype achieves a mechanical resolution of 4.5 ° by using only 4 permanent magnets, 2Wiegand sensors and a rotating steel gear wheel with 20 teeth.}, language = {en} } @article{ZastrowPanagiotopoulos1979, author = {Zastrow, Udo and Panagiotopoulos, P. D.}, title = {An integral "Equation" approach to the unilateral contact problem}, series = {ZAMM - Zeitschrift f{\"u}r angewandte Mathematik und Mechanik. 59 (1979), H. 8}, journal = {ZAMM - Zeitschrift f{\"u}r angewandte Mathematik und Mechanik. 59 (1979), H. 8}, isbn = {1521-4001}, pages = {392 -- 393}, year = {1979}, language = {en} } @inproceedings{ZugNiemuellerHochgeschwenderetal.2017, author = {Zug, Sebastian and Niemueller, Tim and Hochgeschwender, Nico and Seidensticker, Kai and Seidel, Martin and Friedrich, Tim and Neumann, Tobias and Karras, Ulrich and Kraetzschmar, Gerhard K. and Ferrein, Alexander}, title = {An Integration Challenge to Bridge the Gap Among Industry-Inspired RoboCup Leagues}, series = {RoboCup 2016: Robot World Cup XX. RoboCup 2016.}, booktitle = {RoboCup 2016: Robot World Cup XX. RoboCup 2016.}, publisher = {Springer}, address = {Cham}, isbn = {978-3-319-68792-6}, doi = {10.1007/978-3-319-68792-6_13}, pages = {157 -- 168}, year = {2017}, language = {en} } @article{HartungKumwilaisak2004, author = {Hartung, Frank and Kumwilaisak, W.}, title = {An intraframe error concealment: nonlinear pattern alignment and directional interpolation / Kumwilaisak, W. ; Hartung, F.}, series = {Conference on Image Processing, 2004. ICIP '04. 2004 International / Vol. 2 .}, journal = {Conference on Image Processing, 2004. ICIP '04. 2004 International / Vol. 2 .}, pages = {825 -- 828}, year = {2004}, language = {en} } @inproceedings{AlhwarinSchifferFerreinetal.2019, author = {Alhwarin, Faraj and Schiffer, Stefan and Ferrein, Alexander and Scholl, Ingrid}, title = {An Optimized Method for 3D Body Scanning Applications Based on KinectFusion}, series = {Communications in Computer and Information Science}, volume = {1024}, booktitle = {Communications in Computer and Information Science}, publisher = {Springer}, issn = {1865-0929}, doi = {10.1007/978-3-030-29196-9_6}, pages = {100 -- 113}, year = {2019}, language = {en} } @article{Schuba1999, author = {Schuba, Marko}, title = {Analyse der Antwortzeit von zuverl{\"a}ssigen Multicast-Protokollen im Internet}, series = {Multicast - Protokolle und Anwendungen : 20. - 21. Mai 1999, Braunschweig; 1. GI-Workshop / [Workshop-Leitung: Martina Zitterbart ...]}, journal = {Multicast - Protokolle und Anwendungen : 20. - 21. Mai 1999, Braunschweig; 1. GI-Workshop / [Workshop-Leitung: Martina Zitterbart ...]}, address = {Braunschweig}, pages = {1 -- 14}, year = {1999}, language = {en} } @article{OrzadaBitzJohstetal.2017, author = {Orzada, Stephan and Bitz, Andreas and Johst, S{\"o}ren and Gratz, Marcel and V{\"o}lker, Maximilian N. and Kraff, Oliver and Abuelhaija, Ashraf and Fiedler, Thomas M. and Solbach, Klaus and Quick, Harald H. and Ladd, Mark E.}, title = {Analysis of an integrated 8-Channel Tx/Rx body array for use as a body coil in 7-Tesla MRI}, series = {Frontiers in Physics}, volume = {5}, journal = {Frontiers in Physics}, number = {Jun}, issn = {2296-424X}, doi = {10.3389/fphy.2017.00017}, year = {2017}, language = {en} } @inproceedings{DinghoferHartung2020, author = {Dinghofer, Kai and Hartung, Frank}, title = {Analysis of Criteria for the Selection of Machine Learning Frameworks}, series = {2020 International Conference on Computing, Networking and Communications (ICNC)}, booktitle = {2020 International Conference on Computing, Networking and Communications (ICNC)}, publisher = {IEEE}, address = {New York, NY}, doi = {10.1109/ICNC47757.2020.9049650}, pages = {373 -- 377}, year = {2020}, abstract = {With the many achievements of Machine Learning in the past years, it is likely that the sub-area of Deep Learning will continue to deliver major technological breakthroughs [1]. In order to achieve best results, it is important to know the various different Deep Learning frameworks and their respective properties. This paper provides a comparative overview of some of the most popular frameworks. First, the comparison methods and criteria are introduced and described with a focus on computer vision applications: Features and Uses are examined by evaluating papers and articles, Adoption and Popularity is determined by analyzing a data science study. Then, the frameworks TensorFlow, Keras, PyTorch and Caffe are compared based on the previously described criteria to highlight properties and differences. Advantages and disadvantages are compared, enabling researchers and developers to choose a framework according to their specific needs.}, language = {en} } @article{Schuba1999, author = {Schuba, Marko}, title = {Analysis of Feedback Error Control Schemes for Block Based Video Communication / Meggers, Jens ; Schuba, Marko}, year = {1999}, language = {en} } @article{PrumePeterRuedigeretal.2005, author = {Prume, Klaus and Peter, F. and R{\"u}diger, A. and Dittmann, R.}, title = {Analysis of shape effects on the piezoresponse in ferroelectric nanograins with and without adsorbates / Peter, F. ; R{\"u}diger, A. ; Dittmann, R. ; Waser, R. ; Szot, K. ; Reichenberg, B. ; Prume, K. ;}, series = {Applied Physics Letters . 87 (2005), H. 8}, journal = {Applied Physics Letters . 87 (2005), H. 8}, isbn = {0003-6951}, pages = {082901 -- 082901-3}, year = {2005}, language = {en} } @inproceedings{CordesGligorevicBlicharski2019, author = {Cordes, Sven and Gligorevic, Snjezana and Blicharski, Peter}, title = {Analysis of sine precision influence on DOA estimation using the MUSIC algorithm}, series = {2019 20th International Radar Symposium (IRS)}, booktitle = {2019 20th International Radar Symposium (IRS)}, isbn = {978-3-7369-9860-5}, doi = {10.23919/IRS.2019.8768162}, pages = {1 -- 10}, year = {2019}, language = {en} } @inproceedings{ArndtConzenElsenetal.2023, author = {Arndt, Tobias and Conzen, Max and Elsen, Ingo and Ferrein, Alexander and Galla, Oskar and K{\"o}se, Hakan and Schiffer, Stefan and Tschesche, Matteo}, title = {Anomaly detection in the metal-textile industry for the reduction of the cognitive load of quality control workers}, series = {PETRA '23: Proceedings of the 16th International Conference on PErvasive Technologies Related to Assistive Environments}, booktitle = {PETRA '23: Proceedings of the 16th International Conference on PErvasive Technologies Related to Assistive Environments}, publisher = {ACM}, isbn = {9798400700699}, doi = {10.1145/3594806.3596558}, pages = {535 -- 542}, year = {2023}, abstract = {This paper presents an approach for reducing the cognitive load for humans working in quality control (QC) for production processes that adhere to the 6σ -methodology. While 100\% QC requires every part to be inspected, this task can be reduced when a human-in-the-loop QC process gets supported by an anomaly detection system that only presents those parts for manual inspection that have a significant likelihood of being defective. This approach shows good results when applied to image-based QC for metal textile products.}, language = {en} } @inproceedings{WittigRuettersBragard2024, author = {Wittig, M. and R{\"u}tters, Ren{\´e} and Bragard, Michael}, title = {Application of RL in control systems using the example of a rotatory inverted pendulum}, series = {Tagungsband AALE 2024 : Fit f{\"u}r die Zukunft: praktische L{\"o}sungen f{\"u}r die industrielle Automation}, booktitle = {Tagungsband AALE 2024 : Fit f{\"u}r die Zukunft: praktische L{\"o}sungen f{\"u}r die industrielle Automation}, editor = {Reiff-Stephan, J{\"o}rg and J{\"a}kel, Jens and Schwarz, Andr{\´e}}, publisher = {le-tex publishing services GmbH}, address = {Leipzig}, isbn = {978-3-910103-02-3}, doi = {10.33968/2024.53}, pages = {241 -- 248}, year = {2024}, abstract = {In this paper, the use of reinforcement learning (RL) in control systems is investigated using a rotatory inverted pendulum as an example. The control behavior of an RL controller is compared to that of traditional LQR and MPC controllers. This is done by evaluating their behavior under optimal conditions, their disturbance behavior, their robustness and their development process. All the investigated controllers are developed using MATLAB and the Simulink simulation environment and later deployed to a real pendulum model powered by a Raspberry Pi. The RL algorithm used is Proximal Policy Optimization (PPO). The LQR controller exhibits an easy development process, an average to good control behavior and average to good robustness. A linear MPC controller could show excellent results under optimal operating conditions. However, when subjected to disturbances or deviations from the equilibrium point, it showed poor performance and sometimes instable behavior. Employing a nonlinear MPC Controller in real time was not possible due to the high computational effort involved. The RL controller exhibits by far the most versatile and robust control behavior. When operated in the simulation environment, it achieved a high control accuracy. When employed in the real system, however, it only shows average accuracy and a significantly greater performance loss compared to the simulation than the traditional controllers. With MATLAB, it is not yet possible to directly post-train the RL controller on the Raspberry Pi, which is an obstacle to the practical application of RL in a prototyping or teaching setting. Nevertheless, RL in general proves to be a flexible and powerful control method, which is well suited for complex or nonlinear systems where traditional controllers struggle.}, language = {en} } @article{FassbenderBuehler1999, author = {Faßbender, Heinz and B{\"u}hler, Gerhard}, title = {Applying Ada, Java and CORBA for making a command and control information system platform independent}, series = {Proceedings : (SIGAda '99) ; October 17 - 21, 1999 ; Crowne Plaza, Redondo Beach \& Marine Hotel, Redondo Beach, CA, USA / ACM SIGAda Annual International Conference}, journal = {Proceedings : (SIGAda '99) ; October 17 - 21, 1999 ; Crowne Plaza, Redondo Beach \& Marine Hotel, Redondo Beach, CA, USA / ACM SIGAda Annual International Conference}, publisher = {ACM}, address = {New York, NY}, isbn = {1-58113-127-5}, pages = {83 -- 88}, year = {1999}, language = {en} } @incollection{EggertZaehlWolfetal.2023, author = {Eggert, Mathias and Z{\"a}hl, Philipp M. and Wolf, Martin R. and Haase, Martin}, title = {Applying leaderboards for quality improvement in software development projects}, series = {Software Engineering for Games in Serious Contexts}, booktitle = {Software Engineering for Games in Serious Contexts}, editor = {Cooper, Kendra M.L. and Bucchiarone, Antonio}, publisher = {Springer}, address = {Cham}, isbn = {978-3-031-33337-8 (Print)}, doi = {10.1007/978-3-031-33338-5_11}, pages = {243 -- 263}, year = {2023}, abstract = {Software development projects often fail because of insufficient code quality. It is now well documented that the task of testing software, for example, is perceived as uninteresting and rather boring, leading to poor software quality and major challenges to software development companies. One promising approach to increase the motivation for considering software quality is the use of gamification. Initial research works already investigated the effects of gamification on software developers and come to promising. Nevertheless, a lack of results from field experiments exists, which motivates the chapter at hand. By conducting a gamification experiment with five student software projects and by interviewing the project members, the chapter provides insights into the changing programming behavior of information systems students when confronted with a leaderboard. The results reveal a motivational effect as well as a reduction of code smells.}, language = {en} } @article{FerreinDyllaLakemeyeretal.2008, author = {Ferrein, Alexander and Dylla, Frank and Lakemeyer, Gerhard and Murray, Jan}, title = {Approaching a formal soccer theory from behaviour specifications in robotic soccer / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard ; Murray, Jan ; Obst, Oliver ; R{\"o}fer, Thomas ; Schiffer, Stefan ; Stolzenburg, Frieder ; Visser, Ubbo ; Wagner, Tho}, series = {Computers in sport / editors: P Dabnichki}, journal = {Computers in sport / editors: P Dabnichki}, publisher = {WIT Press}, address = {Southampton}, isbn = {978-1-8456-4064-4}, pages = {161 -- 185}, year = {2008}, language = {en} } @inproceedings{DammRahierRitzetal.2013, author = {Damm, Sebastian and Rahier, Michael and Ritz, Thomas and Sch{\"a}fer, Thomas}, title = {Architecture for platform- and hardware-independent mesh networks : how to unify the channels}, series = {ICSNC 2013 : The Eighth International Conference on Systems and Networks Communications ; October 27, 2013 to October 31, 2013, Venice Italy}, booktitle = {ICSNC 2013 : The Eighth International Conference on Systems and Networks Communications ; October 27, 2013 to October 31, 2013, Venice Italy}, editor = {Davoli, Renzo}, publisher = {Curran Associates}, address = {Red Hook, NY}, isbn = {978-1-61208-305-6}, pages = {131 -- 134}, year = {2013}, abstract = {This paper will prove that mesh networks among different platforms and hardware channels can help to channel valuable information even if public telecommunication infrastructure is not available due to arbitrary reasons. Therefore, results of a simulation for mesh networks on mass events will be provided, followed by the developed architecture and an outlook on future research. The developed architecture is currently being implemented and field tested on mass events.}, language = {en} } @book{Mayer2001, author = {Mayer, Claudia}, title = {Art : from prehistoric art to modernism / [Text: Claudia Mayer-Iswandy]}, publisher = {DuMont}, address = {K{\"o}ln}, isbn = {3-7701-7048-2}, pages = {[19] S. : zahlr. Ill. + Beil. (19 S.)}, year = {2001}, language = {en} } @inproceedings{StoebeHoefkenSchubaetal.2013, author = {St{\"o}be, Rolf and H{\"o}fken, Hans-Wilhelm and Schuba, Marko and Breuer, Michael}, title = {Artificial ageing of mobile devices using a simulated GSM/GPRS network}, series = {Eighth International Conference on Availability, Reliability and Security (ARES) : 2-6 Sept. 2013, Regensburg}, booktitle = {Eighth International Conference on Availability, Reliability and Security (ARES) : 2-6 Sept. 2013, Regensburg}, publisher = {IEEE}, pages = {493 -- 497}, year = {2013}, language = {en} } @inproceedings{SchaenzleAltherrEdereretal.2015, author = {Sch{\"a}nzle, Christian and Altherr, Lena and Ederer, Thorsten and Lorenz, Ulf and Pelz, Peter F.}, title = {As good as it can be: Ventilation system design by a combined scaling and discrete optimization method}, series = {Proceedings of FAN 2015}, booktitle = {Proceedings of FAN 2015}, pages = {1 -- 11}, year = {2015}, abstract = {The understanding that optimized components do not automatically lead to energy-efficient systems sets the attention from the single component on the entire technical system. At TU Darmstadt, a new field of research named Technical Operations Research (TOR) has its origin. It combines mathematical and technical know-how for the optimal design of technical systems. We illustrate our optimization approach in a case study for the design of a ventilation system with the ambition to minimize the energy consumption for a temporal distribution of diverse load demands. By combining scaling laws with our optimization methods we find the optimal combination of fans and show the advantage of the use of multiple fans.}, language = {en} } @inproceedings{NiemuellerLakemeyerFerrein2013, author = {Niem{\"u}ller, Tim and Lakemeyer, Gerhard and Ferrein, Alexander}, title = {Aspects of integrating diverse software into robotic systems extended abstract}, series = {ICRA 2013 - 8th Workshop on Software Development and Integration in Robotics (SDIR), Karlsruhe, Germany}, booktitle = {ICRA 2013 - 8th Workshop on Software Development and Integration in Robotics (SDIR), Karlsruhe, Germany}, pages = {1 -- 2}, year = {2013}, language = {en} } @inproceedings{LorenzAltherrPelz2020, author = {Lorenz, Imke-Sophie and Altherr, Lena and Pelz, Peter F.}, title = {Assessing and Optimizing the Resilience of Water Distribution Systems Using Graph-Theoretical Metrics}, series = {Operations Research Proceedings 2019}, booktitle = {Operations Research Proceedings 2019}, editor = {Neufeld, Janis S. and Buscher, Udo and Lasch, Rainer and M{\"o}st, Dominik and Sch{\"o}nberger, J{\"o}rn}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-48439-2}, doi = {10.1007/978-3-030-48439-2_63}, pages = {521 -- 527}, year = {2020}, abstract = {Water distribution systems are an essential supply infrastructure for cities. Given that climatic and demographic influences will pose further challenges for these infrastructures in the future, the resilience of water supply systems, i.e. their ability to withstand and recover from disruptions, has recently become a subject of research. To assess the resilience of a WDS, different graph-theoretical approaches exist. Next to general metrics characterizing the network topology, also hydraulic and technical restrictions have to be taken into account. In this work, the resilience of an exemplary water distribution network of a major German city is assessed, and a Mixed-Integer Program is presented which allows to assess the impact of capacity adaptations on its resilience.}, language = {en} } @inproceedings{BitzKraffOrzadaetal.2012, author = {Bitz, Andreas and Kraff, O. and Orzada, S. and Maderwald, S. and Brote, I. and Johst, S. and Ladd, E.}, title = {Assessment of RF Safety of Transmit Coils at 7 Tesla by Experimental and Numerical Procedures (490.)}, series = {19th annual ISMRM scientific meeting and exhibition 2011 : Montreal, Quebec, Canada, 7 - 13 May 2011}, booktitle = {19th annual ISMRM scientific meeting and exhibition 2011 : Montreal, Quebec, Canada, 7 - 13 May 2011}, number = {Volume 1}, publisher = {Curran}, address = {Red Hook, NY}, isbn = {978-1-61839-284-8}, pages = {475}, year = {2012}, language = {en} } @article{HoffmannRohrbachUhletal.2022, author = {Hoffmann, Andreas and Rohrbach, Felix and Uhl, Matthias and Ceblin, Maximilian and Bauer, Thomas and Mallah, Marcel and Jacob, Timo and Heuermann, Holger and Kuehne, Alexander J. C.}, title = {Atmospheric pressure plasma-jet treatment of polyacrylonitrile-nonwovens—Stabilization and roll-to-roll processing}, series = {Journal of Applied Polymer Science}, volume = {139}, journal = {Journal of Applied Polymer Science}, number = {37}, publisher = {Wiley}, issn = {0021-8995 (Print)}, doi = {10.1002/app.52887}, pages = {1 -- 9}, year = {2022}, abstract = {Carbon nanofiber nonwovens represent a powerful class of materials with prospective application in filtration technology or as electrodes with high surface area in batteries, fuel cells, and supercapacitors. While new precursor-to-carbon conversion processes have been explored to overcome productivity restrictions for carbon fiber tows, alternatives for the two-step thermal conversion of polyacrylonitrile precursors into carbon fiber nonwovens are absent. In this work, we develop a continuous roll-to-roll stabilization process using an atmospheric pressure microwave plasma jet. We explore the influence of various plasma-jet parameters on the morphology of the nonwoven and compare the stabilized nonwoven to thermally stabilized samples using scanning electron microscopy, differential scanning calorimetry, and infrared spectroscopy. We show that stabilization with a non-equilibrium plasma-jet can be twice as productive as the conventional thermal stabilization in a convection furnace, while producing electrodes of comparable electrochemical performance.}, language = {en} } @article{Benkner1995, author = {Benkner, Thorsten}, title = {Autonomous Slot Assignment Schemes for PRMA++ Third Generation TDMA Systems}, series = {Proceedings / Organization: IEEE Vehicular Technology/Communications Society; Joint Chapter in the Benelux Section and Telecommunications Division, Eindhoven University of Technology, The Netherlands. Ed.: Peter Smulders}, journal = {Proceedings / Organization: IEEE Vehicular Technology/Communications Society; Joint Chapter in the Benelux Section and Telecommunications Division, Eindhoven University of Technology, The Netherlands. Ed.: Peter Smulders}, publisher = {Techn. Univ. Eindhoven, Telecommunications Div.}, address = {Eindhoven}, isbn = {9061449928}, pages = {209 S.}, year = {1995}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC a system for future broadband aeronautical multi-carrier communications in the L-BAND}, series = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, booktitle = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-1108-5}, pages = {4D2-1 -- 4D2-13}, year = {2007}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC - Aeronautical Broadband Communication in the L-Band}, series = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, booktitle = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, publisher = {Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, organization = {European Air and Space Conference <1, 2007, Berlin>}, issn = {0070-4083}, pages = {487 -- 496}, year = {2007}, language = {en} } @inproceedings{OPUS4-6272, title = {B-AMC — broadband aeronautical multi-carrier communications}, series = {Integrated Communications, Navigation and Surveillance Conference : [ICNS 2008] ; Bethesda, Md., 5 - 7 May 2008}, booktitle = {Integrated Communications, Navigation and Surveillance Conference : [ICNS 2008] ; Bethesda, Md., 5 - 7 May 2008}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-2303-3 ; 978-1-4244-2304-0}, pages = {1 -- 12}, year = {2008}, language = {en} } @inproceedings{BitzAlaydrusStreckertetal.2001, author = {Bitz, Andreas and Alaydrus, M. and Streckert, J. and Hansen, V.W.}, title = {Base station antennas embedded in complex environments: rf exposure in controlled areas}, series = {23rd BEMS Annual Meeting, St. Paul, Minnesota, USA, 49-50, June 2001}, booktitle = {23rd BEMS Annual Meeting, St. Paul, Minnesota, USA, 49-50, June 2001}, publisher = {Bioelectromagnetics Society}, address = {Frederick, MD}, pages = {49 -- 50}, year = {2001}, language = {en} } @article{Zastrow1985, author = {Zastrow, Udo}, title = {Basic geometrical singularities in plane-elasticity and plate-bending problems}, series = {International Journal of Solids and Structures. 21 (1985), H. 10}, journal = {International Journal of Solids and Structures. 21 (1985), H. 10}, isbn = {0020-7683}, pages = {1047 -- 1067}, year = {1985}, language = {en} } @article{GspandlPillReipetal.2011, author = {Gspandl, Stephan and Pill, Ingo and Reip, Michael and Steinbauer, Gerald and Ferrein, Alexander}, title = {Belief Management for High-Level Robot Programs}, series = {Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence [electronic resource] : Barcelona, Catalonia, Spain, 16 - 22 July 2011 / sponsored by International Joint Conferences on Artificial Intelligence (IJCAI) and the Association for the Advancement of Artificial Intelligence (AAAI). Ed. by Toby Walsh}, journal = {Proceedings of the Twenty-Second International Joint Conference on Artificial Intelligence [electronic resource] : Barcelona, Catalonia, Spain, 16 - 22 July 2011 / sponsored by International Joint Conferences on Artificial Intelligence (IJCAI) and the Association for the Advancement of Artificial Intelligence (AAAI). Ed. by Toby Walsh}, pages = {900 -- 905}, year = {2011}, language = {en} } @article{RensFerrein2013, author = {Rens, Gavin and Ferrein, Alexander}, title = {Belief-node condensation for online POMDP algorithms}, publisher = {IEEE}, address = {New York}, pages = {1 -- 7}, year = {2013}, abstract = {Slightly extended version of the paper accepted at the Robotics and Artificial Intelligence Workshop, a special track of IEEE AFRICON-2013, held in Mauritius, 9-12 September 2013}, language = {en} } @article{SchulteTiggesFoersterNikolovskietal.2022, author = {Schulte-Tigges, Joschua and F{\"o}rster, Marco and Nikolovski, Gjorgji and Reke, Michael and Ferrein, Alexander and Kaszner, Daniel and Matheis, Dominik and Walter, Thomas}, title = {Benchmarking of various LiDAR sensors for use in self-driving vehicles in real-world environments}, series = {Sensors}, volume = {22}, journal = {Sensors}, number = {19}, publisher = {MDPI}, address = {Basel}, issn = {1424-8220}, doi = {10.3390/s22197146}, pages = {20 Seiten}, year = {2022}, abstract = {Abstract In this paper, we report on our benchmark results of the LiDAR sensors Livox Horizon, Robosense M1, Blickfeld Cube, Blickfeld Cube Range, Velodyne Velarray H800, and Innoviz Pro. The idea was to test the sensors in different typical scenarios that were defined with real-world use cases in mind, in order to find a sensor that meet the requirements of self-driving vehicles. For this, we defined static and dynamic benchmark scenarios. In the static scenarios, both LiDAR and the detection target do not move during the measurement. In dynamic scenarios, the LiDAR sensor was mounted on the vehicle which was driving toward the detection target. We tested all mentioned LiDAR sensors in both scenarios, show the results regarding the detection accuracy of the targets, and discuss their usefulness for deployment in self-driving cars.}, language = {en} } @incollection{SchneiderWisselinkCzarneckietal.2024, author = {Schneider, Dominik and Wisselink, Frank and Czarnecki, Christian and N{\"o}lle, Nikolai}, title = {Benefits and framework conditions for information-driven business models concerning the Internet of Things}, series = {Digitalization in companies}, booktitle = {Digitalization in companies}, publisher = {Springer}, address = {Wiesbaden}, isbn = {978-3-658-39093-8 (Print)}, doi = {10.1007/978-3-658-39094-5_5}, pages = {59 -- 75}, year = {2024}, abstract = {In the context of the increasing digitalization, the Internet of Things (IoT) is seen as a technological driver through which completely new business models can emerge in the interaction of different players. Identified key players include traditional industrial companies, municipalities and telecommunications companies. The latter, by providing connectivity, ensure that small devices with tiny batteries can be connected almost anywhere and directly to the Internet. There are already many IoT use cases on the market that provide simplification for end users, such as Philips Hue Tap. In addition to business models based on connectivity, there is great potential for information-driven business models that can support or enhance existing business models. One example is the IoT use case Park and Joy, which uses sensors to connect parking spaces and inform drivers about available parking spaces in real time. Information-driven business models can be based on data generated in IoT use cases. For example, a telecommunications company can add value by deriving more decision-relevant information - called insights - from data that is used to increase decision agility. In addition, insights can be monetized. The monetization of insights can only be sustainable, if careful attention is taken and frameworks are considered. In this chapter, the concept of information-driven business models is explained and illustrated with the concrete use case Park and Joy. In addition, the benefits, risks and framework conditions are discussed.}, language = {en} } @article{Mayer1995, author = {Mayer, Claudia}, title = {Between Resistance and Affirmation: Christa Wolf and German Unification}, series = {Canadian review of comparative literature : CRCL = Revue canadienne de litt{\´e}rature compar{\´e}e / Canadian Comparative Literature Association. 22 (1995), H. 3-4}, journal = {Canadian review of comparative literature : CRCL = Revue canadienne de litt{\´e}rature compar{\´e}e / Canadian Comparative Literature Association. 22 (1995), H. 3-4}, isbn = {0319-051X}, pages = {813 -- 835}, year = {1995}, language = {en} } @article{Mayer1993, author = {Mayer, Claudia}, title = {Between Trans- and Interdisciplinarity. »Germanistik« and the Dialectic of Inclusion and Exclusion of the Other(s)}, series = {Language and literature today : proceedings of the XIXth triennal congress of the International Federation for Modern Languages and Literatures ; Bras{\´i}lia 22 - 30 August 1993. General ed. Neide de Faria.}, journal = {Language and literature today : proceedings of the XIXth triennal congress of the International Federation for Modern Languages and Literatures ; Bras{\´i}lia 22 - 30 August 1993. General ed. Neide de Faria.}, publisher = {Univ.}, address = {Brasilia}, isbn = {85-230-0405-x}, pages = {958 -- 966}, year = {1993}, language = {en} } @article{HeuermannErkens2004, author = {Heuermann, Holger and Erkens, Holger}, title = {Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger}, series = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1}, journal = {Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1}, publisher = {Horizon House Publ.}, address = {London}, isbn = {1-580-53992-0}, pages = {297 -- 300}, year = {2004}, language = {en} } @article{ZastrowRieder1980, author = {Zastrow, Udo and Rieder, G.}, title = {Bracketing eigenvalues of an oscillating elastic body by integral equations}, series = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay}, journal = {Bracketing of eigenfrequencies of continous structures : Euromech Colloquium, no. 112, M{\´a}traf{\"u}red (Hungary), 21 - 23 February, 1979 / ed. by {\`A}. Bosznay}, publisher = {Akad. Kiad{\´o}}, address = {Budapest}, isbn = {963-05-2625-5}, pages = {421 -- 434}, year = {1980}, language = {en} } @inproceedings{SajatovicRihacekHaindletal.2007, author = {Sajatovic, Miodrag and Rihacek, Christoph and Haindl, Bernhard and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana}, title = {Broadband VHF (B-VHF) project achievements and follow-on activities}, series = {Integrated Communications, Navigation and Surveillance Conference : Herndon, VA, 1 - 3 May 2007}, booktitle = {Integrated Communications, Navigation and Surveillance Conference : Herndon, VA, 1 - 3 May 2007}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {1-4244-1216-1}, pages = {1 -- 8}, year = {2007}, language = {en} } @article{SchifferFerreinLakemeyer2012, author = {Schiffer, Stefan and Ferrein, Alexander and Lakemeyer, Gerhard}, title = {Caesar: an intelligent domestic service robot}, series = {Intelligent service robotics}, volume = {5}, journal = {Intelligent service robotics}, number = {4}, publisher = {Springer}, address = {Berlin}, issn = {1861-2776}, doi = {10.1007/s11370-012-0118-y}, pages = {259 -- 276}, year = {2012}, abstract = {In this paper we present CAESAR, an intelligent domestic service robot. In domestic settings for service robots complex tasks have to be accomplished. Those tasks benefit from deliberation, from robust action execution and from flexible methods for human-robot interaction that account for qualitative notions used in natural language as well as human fallibility. Our robot CAESAR deploys AI techniques on several levels of its system architecture. On the low-level side, system modules for localization or navigation make, for instance, use of path-planning methods, heuristic search, and Bayesian filters. For face recognition and human-machine interaction, random trees and well-known methods from natural language processing are deployed. For deliberation, we use the robot programming and plan language READYLOG, which was developed for the high-level control of agents and robots; it allows combining programming the behaviour using planning to find a course of action. READYLOG is a variant of the robot programming language Golog. We extended READYLOG to be able to cope with qualitative notions of space frequently used by humans, such as "near" and "far". This facilitates human-robot interaction by bridging the gap between human natural language and the numerical values needed by the robot. Further, we use READYLOG to increase the flexible interpretation of human commands with decision-theoretic planning. We give an overview of the different methods deployed in CAESAR and show the applicability of a system equipped with these AI techniques in domestic service robotics}, language = {en} } @article{Heuermann2008, author = {Heuermann, Holger}, title = {Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements}, series = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1}, journal = {IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1}, isbn = {0018-9480}, pages = {2505 -- 2510}, year = {2008}, language = {en} } @article{ClaerFerreinSchiffer2019, author = {Claer, Mario and Ferrein, Alexander and Schiffer, Stefan}, title = {Calibration of a Rotating or Revolving Platform with a LiDAR Sensor}, series = {Applied Sciences}, volume = {Volume 9}, journal = {Applied Sciences}, number = {issue 11, 2238}, publisher = {MDPI}, address = {Basel}, issn = {2076-3417}, doi = {10.3390/app9112238}, pages = {18 Seiten}, year = {2019}, language = {en} } @article{HeuermannSchiek1994, author = {Heuermann, Holger and Schiek, Burkhard}, title = {Calibration of network analyser measurements with leakage errors}, series = {Electronics letters. 30 (1994), H. 1}, journal = {Electronics letters. 30 (1994), H. 1}, isbn = {0013-5194}, pages = {52 -- 53}, year = {1994}, language = {en} }