TY - JOUR A1 - Hartung, Frank A1 - Girod, Bernd A1 - Horn, Uwe T1 - Subband Image Coding / Girod, Bernd ; Hartung, Frank ; Horn, Uwe JF - Subband and Wavelet Transforms: Design and Applications / ed. by Ali N. Akansu Y1 - 1995 SN - 0792396456 SP - 213 EP - 250 PB - Kluwer CY - Boston ER - TY - JOUR A1 - Hüning, Felix A1 - Sparta, K. A1 - Redhammer, G. J. A1 - Roussel, P. T1 - Structural Phase Transition in the 2D Spin Dimer Compound SrCu2(BO3)2 / Sparta, K. ; Redhammer, G. J. ; Roussel, P. ; Heger, G. ; Roth, G. ; Ionescu, A. Lemmens, P. ; Grove, M. ; Güntherrodt, G. ; Hüning, F. ; Lueken, H. ; Kageyama, H. ; Onizuka, K ; Ueda JF - The European Physical Journal B - Condensed Matter and Complex Systems. 19 (2001), H. 4 Y1 - 2001 SN - 1434-6036 SP - 507 EP - 516 PB - - ER - TY - JOUR A1 - Elsen, Ingo A1 - Hartung, Frank A1 - Horn, Uwe A1 - Kampmann, Markus A1 - Peters, Liliane ED - Voas, Jeffrey T1 - Streaming technology in 3G mobile communication systems JF - Computer : innovative technology for computer professionals N2 - Third-generation mobile communication systems will combine standardized streaming with a range of unique services to provide high-quality Internet content that meets the specific needs of the rapidly growing mobile market. Y1 - 2001 SN - 0018-9162 SN - 1558-0814 VL - 34 IS - 9 Seiten SP - 46 EP - 52 PB - IEEE CY - New York ER - TY - JOUR A1 - Hartung, Frank A1 - Girod, Bernd T1 - Statistical optimization of switched two-level quantizers with application to DPCM encoding of color video / Hartung, Frank ; Girod, Bernd JF - IEEE International Conference on Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 Y1 - 1996 SN - 0-7803-3192-3 SP - 1974 EP - 1977 ER - TY - JOUR A1 - Hartung, Frank A1 - Noh, Jeonghun A1 - Baccichet, Pierpaolo A1 - Mavlankar, Aditya T1 - Standford Peer-to-Peer Mulicast (SPPM) - Overview and recent Extensions / Noh, Jeonghun ; Baccichet, Pierpaolo ; Hartung, Frank ; Mavlankar, Aditya ; Girod, Bernd Y1 - 2009 SN - 978-1-4244-4593-6 N1 - Picture Coding Symposium, 2009. PCS 2009 ; auch unter IEEE: http://dx.doi.org/10.1109/PCS.2009.5167392 SP - 1 EP - 4 ER - TY - JOUR A1 - Schuba, Marko T1 - SRMT-a scalable and reliable multicast transport protocol JF - IEEE International Conference on Communications, 1998. ICC 98. Vol. 1 Y1 - 1998 SN - 0-7803-4788-9 SP - 612 EP - 616 ER - TY - JOUR A1 - Ferrein, Alexander T1 - Specifying Soccer Moves with Golog JF - Book of abstracts : Cologne, 15 - 17 September 2004 / 1st International Working Conference IT and Sport & 5th conference DVS-Section Computer Science in Sport Y1 - 2005 SN - 3-00-014576-1 N1 - International Working Conference IT and Sport 1, 2004, Köln ; Deutsche Vereinigung für Sportwissenschaft SP - 161 EP - 165 PB - German Sport Univ. CY - Köln ER - TY - JOUR A1 - Ferrein, Alexander A1 - Dylla, Frank A1 - Lakemeyer, Gerhard T1 - Specifying Multirobot Coordination in ICPGolog - From Simulation towards Real Robots / Dylla, Frank ; Ferrein, Alexander ; Lakemeyer, Gerhard Y1 - 2003 N1 - AOS-4 at IJCAI-03 SP - 1 EP - 10 ER - TY - JOUR A1 - Krause, Gregor A1 - Göttlich, S. A1 - Möller, K. A1 - Meurer, D. T1 - Space Charge Phenomena in Partially Crystalline Polymers: On-Line Measurement of Charge Carrier Motion under High AC-Field Strength / G. Krause, S. Göttlich, K. Möller, D. Meurer JF - Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989 Y1 - 1989 N1 - International Conference on Conduction and Breakdown in Solid Dielectrics <3, 1989, Trondheim> PB - IEEE CY - Piscataway, N.J. ER - TY - JOUR A1 - Krause, Gregor A1 - Meurer, D. A1 - Klee, D. T1 - Space Charge Formation Related to the Morphology of Polymers JF - ISE 6 : 6th International symposium on electrets : Papers Y1 - 1988 N1 - International Symposium on Electrets <6, 1988, Oxford> PB - IEEE CY - Piscataway, NY ER - TY - JOUR A1 - Krause, Gregor A1 - Meurer, D. A1 - Klee, D. T1 - Space charge formation related to the morphology of polymers JF - IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3 Y1 - 1989 N1 - Digital Object Identifier 10.1109/14.30883 SP - 215 EP - 222 ER - TY - JOUR A1 - Zastrow, Udo T1 - Solution of plane anisotropic elastostatical boundary value problems by singular integral equations JF - Acta Mechanica. 44 (1982), H. 1-2 Y1 - 1982 SN - 1619-6937 SP - 59 EP - 71 ER - TY - JOUR A1 - Hüning, Felix T1 - SMD packages for PowerMOSFETs in automotive applications – developments and trends JF - Automotive Designline Europe (2009) Y1 - 2009 PB - - 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 - Schuba, Marko A1 - Reichl, Peter A1 - Kesdogan, Dogan A1 - Junghärtchen, Klaus T1 - Simulative Performance Evaluation of the Temporary Pseudonym Method for Protecting Location Information in GSM Networks / Reichl, P. ; Kesdogan, D. ; Junghärtchen, K. ; Schuba, M. JF - Computer Performance Evaluation - Modelling Techniques and Tools / Puigjaner, Ramon (eds.) Y1 - 1998 SN - 3-540-64949-2 N1 - Lecture notes in computer science ; 1469 SP - 105 EP - 116 PB - Springer CY - Berlin ER - TY - JOUR A1 - Prume, Klaus A1 - Gerber, Peter A1 - Kügeler, Carsten A1 - Roelofs, Andreas T1 - Simulation and measurements of the piezoelectric properties response (d33) of piezoelectric layered thin film structures influenced by the top-electrode size / Prume, K. ; Gerber, P. ; Kügeler, C. ; Roelofs, A. ; Böttger, U. ; Waser, R. ; Schmitz-Kempen, Y1 - 2004 SN - 0-7803-8410-5 N1 - 14th IEEE International Symposium on Applications of Ferroelectrics, 2004. ISAF-04. 2004 SP - 7 EP - 10 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 - Schlamann, Marc A1 - Yoon, Min-Suk A1 - Maderwald, Stefan A1 - Pietrzyk, Thomas A1 - Bitz, Andreas A1 - Gerwig, Marcus A1 - Forsting, Michael A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Kastrup, Oliver T1 - Short term effects of magnetic resonance imaging on excitability of the motor cortex at 1.5T and 7T JF - Academic Radiology N2 - Rationale and Objectives The increasing spread of high-field and ultra-high-field magnetic resonance imaging (MRI) scanners has encouraged new discussion of the safety aspects of MRI. Few studies have been published on possible cognitive effects of MRI examinations. The aim of this study was to examine whether changes are measurable after MRI examinations at 1.5 and 7 T by means of transcranial magnetic stimulation (TMS). Materials and Methods TMS was performed in 12 healthy, right-handed male volunteers. First the individual motor threshold was specified, and then the cortical silent period (SP) was measured. Subsequently, the volunteers were exposed to the 1.5-T MRI scanner for 63 minutes using standard sequences. The MRI examination was immediately followed by another TMS session. Fifteen minutes later, TMS was repeated. Four weeks later, the complete setting was repeated using a 7-T scanner. Control conditions included lying in the 1.5-T scanner for 63 minutes without scanning and lying in a separate room for 63 minutes. TMS was performed in the same way in each case. For statistical analysis, Wilcoxon's rank test was performed. Results Immediately after MRI exposure, the SP was highly significantly prolonged in all 12 subjects at 1.5 and 7 T. The motor threshold was significantly increased. Fifteen minutes after the examination, the measured value tended toward normal again. Control conditions revealed no significant differences. Conclusion MRI examinations lead to a transient and highly significant alteration in cortical excitability. This effect does not seem to depend on the strength of the static magnetic field. Y1 - 2010 U6 - http://dx.doi.org/10.1016/j.acra.2009.10.004 SN - 1076-6332 VL - 17 IS - 3 SP - 277 EP - 281 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Turdumamatov, Samat A1 - Belda, Aljoscha A1 - Heuermann, Holger T1 - Shaping a decoupled atmospheric pressure microwave plasma with antenna structures, Maxwell’s equations, and boundary conditions JF - IEEE Transactions on Plasma Science N2 - This article addresses the need for an innovative technique in plasma shaping, utilizing antenna structures, Maxwell’s laws, and boundary conditions within a shielded environment. The motivation lies in exploring a novel approach to efficiently generate high-energy density plasma with potential applications across various fields. Implemented in an E01 circular cavity resonator, the proposed method involves the use of an impedance and field matching device with a coaxial connector and a specially optimized monopole antenna. This setup feeds a low-loss cavity resonator, resulting in a high-energy density air plasma with a surface temperature exceeding 3500 o C, achieved with a minimal power input of 80 W. The argon plasma, resembling the shape of a simple monopole antenna with modeled complex dielectric values, offers a more energy-efficient alternative compared to traditional, power-intensive plasma shaping methods. Simulations using a commercial electromagnetic (EM) solver validate the design’s effectiveness, while experimental validation underscores the method’s feasibility and practical implementation. Analyzing various parameters in an argon atmosphere, including hot S -parameters and plasma beam images, the results demonstrate the successful application of this technique, suggesting its potential in coating, furnace technology, fusion, and spectroscopy applications. KW - 3-D printing KW - Furnace KW - Fusion KW - Hot S-parameter KW - Mode converter Y1 - 2024 U6 - http://dx.doi.org/10.1109/TPS.2024.3383589 SN - 0093-3813 (Print) SN - 1939-9375 (Online) IS - Early Access SP - 1 EP - 9 PB - IEEE ER - TY - JOUR A1 - Umutlu, Lale A1 - Kraff, Oliver A1 - Fischer, Anja A1 - Kinner, Sonja A1 - Maderwald, Stefan A1 - Nassenstein, Kai A1 - Nensa, Felix A1 - Grüneisen, Johannes A1 - Orzada, Stephan A1 - Bitz, Andreas A1 - Forsting, Michael A1 - Ladd, Mark E. A1 - Lauenstein, Thomas C. T1 - Seven-Tesla MRI of the female pelvis JF - European Radiology Y1 - 2013 U6 - http://dx.doi.org/10.1007/s00330-013-2868-0 SN - 1432-1084 VL - 23 IS - 9 SP - 2364 EP - 2373 PB - Springer CY - Berlin ER - TY - JOUR A1 - Czarnecki, Christian A1 - Winkelmann, Axel A1 - Spiliopoulou, Myra T1 - Services in electronic telecommunication markets: a framework for planning the virtualization of processes JF - Electronic Markets N2 - The potential of electronic markets in enabling innovative product bundles through flexible and sustainable partnerships is not yet fully exploited in the telecommunication industry. One reason is that bundling requires seamless de-assembling and re-assembling of business processes, whilst processes in telecommunication companies are often product-dependent and hard to virtualize. We propose a framework for the planning of the virtualization of processes, intended to assist the decision maker in prioritizing the processes to be virtualized: (a) we transfer the virtualization pre-requisites stated by the Process Virtualization Theory in the context of customer-oriented processes in the telecommunication industry and assess their importance in this context, (b) we derive IT-oriented requirements for the removal of virtualization barriers and highlight their demand on changes at different levels of the organization. We present a first evaluation of our approach in a case study and report on lessons learned and further steps to be performed. KW - Telecommunication KW - Services KW - Process virtualization KW - Product bundling KW - Transformation Y1 - 2010 U6 - http://dx.doi.org/10.1007/s12525-010-0045-8 SN - 1422-8890 VL - 20 IS - 3-4 SP - 197 EP - 207 PB - Springer CY - Berlin ER - TY - JOUR A1 - Krause, Gregor A1 - Schuppe, W.D. A1 - Saure, M. A1 - Andress, H. T1 - Sensitive Analytical and Physical Methods for Diagnosis of Variations in Polyolefin Plaques and Cable Insulations / W.D. Schuppe, M. Saure, H. Andress, K. Möller, D. Meurer, G. Krause JF - Proceedings of the 32nd session : 28th August - 3rd September. Y1 - 1988 N1 - International Conference on Large Electric Systems, CIGRÉ <32, Paris, 1988> ER - TY - JOUR A1 - Schuba, Marko A1 - Wrona, Konrad T1 - Security for Mobile Commerce Applications / Schuba, Marko ; Wrona, Konrad Y1 - 2001 N1 - Multimedia, Internet, Video Technologies 2001 (MIV 2001), Malta, September 1-6, 2001 ; WSEAS Conference ; World Scientific and Engineering Academy and Society SP - 1 EP - 8 ER - TY - JOUR A1 - Samm, Doris A1 - Faissner, H. A1 - Heinrigs, W. A1 - Preussger, A. T1 - Search for the two-photon decay of a light penetrating particle from a 590 MeV proton beam dump / Faissner, H.; Heinrigs, W.; Preussger, A.; Reitz, J.; Samm, D. [u.a.] JF - Zeitschrift für Physik, C Particles and Fields. 44 (1989), H. 4 Y1 - 1989 SP - 557 EP - 566 ER - TY - JOUR A1 - Samm, Doris A1 - Faissner, H. A1 - Göttlicher, P. A1 - Matela, H. T1 - Search for scalar and pseudoscalar bosons emitted in nuclear decays via their interactions / Faissner, H.; Goettlicher, P. ; Matela, H. ; Samm, D. JF - Zeitschrift für Physik A Hadrons and Nuclei. 341 (1992), H. 3 Y1 - 1992 SP - 359 EP - 364 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Scattering Parameter Measurements of Microstrip Devices using the Double-LNN Calibration Technique JF - Conference proceedings : [Palais des Festivals et des Congrès Cannes, France, 5 - 8 September 1994] Y1 - 1994 SN - 0-9518032-5-5 N1 - European Microwave Conference <24, 1994, Cannes> PB - Nexus Business Communications CY - Swanley ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - SAR Simulations & Safety JF - NeuroImage Y1 - 2017 U6 - http://dx.doi.org/10.1016/j.neuroimage.2017.03.035 SN - 1053-8119 IS - Epub ahead of print PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Ladd, Mark E. A1 - Clemens, Markus A1 - Bitz, Andreas T1 - Safety of subjects during radiofrequency exposure in ultra-high-field magnetic resonance imaging JF - IEEE Letters on Electromagnetic Compatibility Practice and Applications N2 - Magnetic resonance imaging (MRI) is one of the most important medical imaging techniques. Since the introduction of MRI in the mid-1980s, there has been a continuous trend toward higher static magnetic fields to obtain i.a. a higher signal-to-noise ratio. The step toward ultra-high-field (UHF) MRI at 7 Tesla and higher, however, creates several challenges regarding the homogeneity of the spin excitation RF transmit field and the RF exposure of the subject. In UHF MRI systems, the wavelength of the RF field is in the range of the diameter of the human body, which can result in inhomogeneous spin excitation and local SAR hotspots. To optimize the homogeneity in a region of interest, UHF MRI systems use parallel transmit systems with multiple transmit antennas and time-dependent modulation of the RF signal in the individual transmit channels. Furthermore, SAR increases with increasing field strength, while the SAR limits remain unchanged. Two different approaches to generate the RF transmit field in UHF systems using antenna arrays close and remote to the body are investigated in this letter. Achievable imaging performance is evaluated compared to typical clinical RF transmit systems at lower field strength. The evaluation has been performed under consideration of RF exposure based on local SAR and tissue temperature. Furthermore, results for thermal dose as an alternative RF exposure metric are presented. Y1 - 2020 SN - 2637-6423 U6 - http://dx.doi.org/10.1109/LEMCPA.2020.3029747 VL - 2 IS - 3 SP - 1 EP - 8 PB - IEEE CY - New York, NY ER - TY - JOUR A1 - Hartung, Frank A1 - Baldo, N. A1 - Horn, U. A1 - Kampmann, M. T1 - RTCP feedback based transmission rate control for 3G wireless multimedia streaming / Baldo, N. ; Horn, U. ; Kampmann, M. ; Hartung, F. ; JF - 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. Date:5-8 Sept. 2004 ; Vol. 3 Y1 - 2004 N1 - http://dx.doi.org/10.1109/PIMRC.2004.1368313 SP - 1817 EP - 1821 ER - TY - JOUR A1 - Ferrein, Alexander A1 - Jacobs, Stefan A1 - Schiffer, Stefan A1 - Beck, Daniel T1 - Robust Collision Avoidance in Unknown Domestic Environments / Jacobs, Stefan ; Ferrein, Alexander ; Schiffer, Stefan ; Beck, Daniel ; Lakemeyer, Gerhard JF - ROBOCUP 2009: ROBOT SOCCER WORLD CUP XIII Y1 - 2009 N1 - Lecture Notes in Computer Science ; 5949 SP - 116 EP - 127 PB - Springer CY - Berlin ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Robust Algorithms for Txx Network Analyzer Self-Calibration Procedures JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 43 (1994), H. 1 Y1 - 1994 SN - 0018-9456 SP - 18 EP - 23 ER - TY - JOUR A1 - Ferrein, Alexander T1 - Robot controllers for highly dynamic environments with real-time constraints JF - Künstliche Intelligenz : KI. 24 (2010), H. 2 Y1 - 2010 SN - 1610-1987 SP - 175 EP - 178 ER - TY - JOUR A1 - Ferrein, Alexander A1 - Steinbauer, Gerald A1 - McPhillips, Graeme A1 - Potgieter, Anet T1 - RoboCup Standard Platform League - Team Zadeat : an intercontinental research effort Y1 - 2008 SP - 1 EP - 7 ER - TY - JOUR A1 - Ferrein, Alexander A1 - Marais, Stephen A1 - Potgieter, Anet A1 - Steinbauer, Gerald T1 - RoboCup Junior: A vehicle for S&T education in Africa? Y1 - 2011 SN - 978-1-61284-992-8 N1 - AFRICON, 2011 SP - 1 EP - 6 PB - IEEE CY - New York ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - RF safety assessment of a bilateral four-channel transmit/receive 7 Tesla breast coil: SAR versus temperature limits JF - Medical Physics Y1 - 2017 U6 - http://dx.doi.org/10.1002/mp.12034 N1 - This article is corrected by: Errata: Erratum: “RF safety assessment of a bilateral four-channel transmit/receive 7 Tesla breast coil: SAR versus tissue temperature limits” [Med. Phys. 44(1), 143–157 (2017)] Volume 44, Issue 2, 772 VL - 44 IS - 1 SP - 143 EP - 157 ER - TY - JOUR A1 - Hansen, Volkert W. A1 - Bitz, Andreas A1 - Streckert, Joachim R. T1 - RF Exposure of Biological Systems in Radial Waveguides JF - IEEE Transactions on Electromagnetic Compatibility Y1 - 1999 U6 - http://dx.doi.org/10.1109/15.809852 SN - 1558-187X VL - 41 IS - 4 SP - 487 EP - 493 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 - Hagemann, Hans-Jürgen A1 - Hennings, D. T1 - Reversible Weight change of acceptor-doped BaTiO3. Hagemann, H. J.; Hennings, D. JF - Journal of the American Ceramic Society. 64 (1981) Y1 - 1981 SN - 0002-7820 SP - 590 EP - 594 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5 Y1 - 1997 SN - 0018-9456 SP - 1120 EP - 1127 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure Y1 - 1994 N1 - 1994 IEEE MTT-S International Microwave Symposium digest : May 23 - 27, 1994, San Diego Convention Center, San Diego, California / H. J. Kuno, ed. SP - 1361 EP - 1364 ER - TY - JOUR A1 - Heuermann, Holger A1 - Baumann, F.-M. A1 - Fauth, G. A1 - Albert, M. T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure JF - On-Line Moisture Analysis of Raw Coal Y1 - 1994 N1 - 1993 International Symposium on On-Line Analysis of Coal : Vienna ; [proceedings]. SP - 1361 EP - 1364 ER - TY - JOUR A1 - Altherr, Lena A1 - Brötz, Nicolas A1 - Dietrich, Ingo A1 - Gally, Tristan A1 - Geßner, Felix A1 - Kloberdanz, Hermann A1 - Leise, Philipp A1 - Pelz, Peter Franz A1 - Schlemmer, Pia A1 - Schmitt, Andreas T1 - Resilience in mechanical engineering - a concept for controlling uncertainty during design, production and usage phase of load-carrying structures JF - Applied Mechanics and Materials N2 - Resilience as a concept has found its way into different disciplines to describe the ability of an individual or system to withstand and adapt to changes in its environment. In this paper, we provide an overview of the concept in different communities and extend it to the area of mechanical engineering. Furthermore, we present metrics to measure resilience in technical systems and illustrate them by applying them to load-carrying structures. By giving application examples from the Collaborative Research Centre (CRC) 805, we show how the concept of resilience can be used to control uncertainty during different stages of product life. Y1 - 2018 SN - 1662-7482 U6 - http://dx.doi.org/10.4028/www.scientific.net/AMM.885.187 VL - 885 SP - 187 EP - 198 PB - Trans Tech Publications CY - Bäch ER - TY - JOUR A1 - Ferrein, Alexander A1 - Mies, Christoph A1 - Lakemeyer, Gerhard T1 - Repairing Decision-Theoretic Policies Using Goal-Oriented Planning / Mies, Christoph ; Ferrein, Alexander ; Lakemeyer, Gerhard JF - KI 2008: Advances in Artificial Intelligence : 31st Annual German Conference on AI, KI 2008, Kaiserslautern, Germany, September 23-26, 2008. Proceedings Y1 - 2008 SN - 978-3-540-85844-7 N1 - Lecture Notes in Computer Science ; 5243 SP - 267 EP - 275 PB - Springer CY - Berlin ER - TY - JOUR A1 - Umutlu, Lale A1 - Orzada, Stephan A1 - Kinner, Sonja A1 - Maderwald, Stefan A1 - Bronte, Irina A1 - Bitz, Andreas A1 - Kraff, Oliver A1 - Ladd, Susanne C. A1 - Antoch, Gerald A1 - Ladd, Mark E. A1 - Quick, Harald H. A1 - Lauenstein, Thomas C. T1 - Renal imaging at 7 Tesla: preliminary results JF - European Radiology N2 - Objective To investigate the feasibility of 7T MR imaging of the kidneys utilising a custom-built 8-channel transmit/receive radiofrequency body coil. Methods In vivo unenhanced MR was performed in 8 healthy volunteers on a 7T whole-body MR system. After B0 shimming the following sequences were obtained: 1) 2D and 3D spoiled gradient-echo sequences (FLASH, VIBE), 2) T1-weighted 2D in and opposed phase 3) True-FISP imaging and 4) a T2-weighted turbo spin echo (TSE) sequence. Visual evaluation of the overall image quality was performed by two radiologists. Results Renal MRI at 7T was feasible in all eight subjects. Best image quality was found using T1-weighted gradient echo MRI, providing high anatomical details and excellent conspicuity of the non-enhanced vasculature. With successful shimming, B1 signal voids could be effectively reduced and/or shifted out of the region of interest in most sequence types. However, T2-weighted TSE imaging remained challenging and strongly impaired because of signal heterogeneities in three volunteers. Conclusion The results demonstrate the feasibility and diagnostic potential of dedicated 7T renal imaging. Further optimisation of imaging sequences and dedicated RF coil concepts are expected to improve the acquisition quality and ultimately provide high clinical diagnostic value. Y1 - 2011 SN - 1432-1084 VL - 21 IS - 4 SP - 841 EP - 849 PB - Springer CY - Berlin ER - TY - JOUR A1 - Faßbender, Heinz T1 - Reengineering an Ada95-programmed command and control information system by using UML JF - Proceedings : September 30 - October 4, 2001, Twin Cities, Best Western The Thunderbird Hotel & Convention Center, Bloomington, MN, USA / ACM SIGAda Annual International Conference (SIGAda 2001) Y1 - 2001 SN - 1-58113-392-8 N1 - (Ada letters ; 21,4) SP - 53 EP - 60 PB - ACM CY - New York, NY ER - TY - JOUR A1 - Hagemann, Hans-Jürgen T1 - Reduction of hysteresis losses of ferroelectric BaTiO3. Hagemann, H. J. JF - Ferroelectrics. 22 (1978) Y1 - 1978 SN - 0015-0193 SP - 743 EP - 743 ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Geittner, P. A1 - Warnier, J. A1 - Weling, F. T1 - Reduction of geometric taper losses in the PCVD process. Geittner, P.; Hagemann, H. J.; Warnier, J.; Weling, F.; Wilson, H. JF - Electronics letters : an intern. publication / The Institution of Electrical Engineers. 21 (1985), H. 13 Y1 - 1985 SN - 0013-5194 SP - 870 EP - 871 ER - TY - JOUR A1 - Schiffer, Stefan A1 - Ferrein, Alexander A1 - Lakemeyer, Gerhard T1 - Reasoning with Qualitative Positional Information for Domestic Domains in the Situation Calculus JF - Journal of Intelligent & Robotic Systems Y1 - 2011 SN - 0921-0296 VL - 63 IS - 2 SP - 273 EP - 300 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 - Hillgärtner, Michael A1 - Kappel, U. T1 - Radiating Impedance of Mains Cabling During Emissions Testing JF - EMC Europe 2006 Barcelona : International Symposium on Electromagnetic Compatibility; September 4 - 8, 2006, Campus Nord, Technical University of Catalonia, Barcelona, Spain / [organized by Technical University of Catalonia (UPC) ... Ed. and publ. by: Ferran Silva ...]. - Vol. 1: Proceedings 1 Y1 - 2006 SN - 84-689-9439-1 N1 - EMC Europe <7,2006,Barcelona>; International Symposium on Electromagnetic Compatibility <7, 2006, Barcelona> SP - 17 EP - 22 CY - Barcelona ER - TY - JOUR A1 - Scholl, Ingrid A1 - Palm, Christoph A1 - Lehmann, Thomas A1 - Spitzer, Klaus T1 - Quantitative Farbmessung in laryngoskopischen Bildern. Palm, C; Scholl, I; Lehmann, TM; Spitzer, K. JF - Bildverarbeitung für die Medizin 1998. Hrsg.: Thomas Lehmann ... Y1 - 1998 SN - 3-540-63885-7 SP - 412 EP - 416 PB - Springer CY - Berlin ER - TY - JOUR A1 - Ferrein, Alexander A1 - Schiffer, Stefan A1 - Lakemeyer, Gerhard T1 - Qualitative World Models for Soccer Robots / Schiffer, Stefan ; Ferrein, Alexander ; Lakemeyer, Gerhard JF - Qualitative constraint calculi : application and integration ; KI 2006, 14 - 19 June 2006, Bremen, Germany ; 29th Annual German Conference on Artificial Intelligence ; workshop / Stefan Wölfl ... (eds.) Y1 - 2006 SN - 3-88722-666-6 SP - 3 EP - 14 PB - Univ. CY - Bremen ER - TY - JOUR A1 - Wolf, Martin A1 - Simon, S. A1 - Schlick, Christopher T1 - Qualitative and Quantitative Analysis of Cooperation / Wolf, M. ; Simon, S. ; Schlick, C. JF - Proceedings : May 26 - 29, 1998, Cannes (France) = Actes : 26 - 29 mai 1998 / INRIA, Institut National de Recherche en Informatique et en Automatique, Unité de recherche ... F. Darses ..., eds Y1 - 1998 N1 - COOP ; Institut National de Recherche en Informatique et en Automatique ; Centre ; (Sophia Antipolis) ; International Conference on the Design of Cooperative Systems ; (3 ; 1998.05.26-29 ; Cannes) ; Conference Internationale sur la Conception de Systèmes Coopératifs ; (3 ; 1998.05.26-29 ; Cannes) ; COOP ; (3 ; 1998.05.26-29 ; Cannes) SP - 1 EP - 5 PB - - CY - Cannes ER - TY - JOUR A1 - Schuba, Marko A1 - Schneider, Gaby A1 - Haverkort, Boudewijn R. T1 - QNA-MC: A Performance Evaluation Tool for Communication Networks with Multicast Data Streams / Schneider, G. ; Schuba, M. ; Haverkort, B. R. JF - Computer Performance Evaluation - Modelling Techniques and Tools / Puigjaner, Ramon (eds.) Y1 - 1998 SN - 3-540-64949-2 N1 - Lecture notes in computer science ; 1469 SP - 105 EP - 116 PB - Springer CY - Berlin 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 - Coll-Perales, Baldomero A1 - Schulte-Tigges, Joschua A1 - Rondinone, Michele A1 - Gozalvez, Javier A1 - Reke, Michael A1 - Matheis, Dominik A1 - Walter, Thomas T1 - Prototyping and evaluation of infrastructure-assisted transition of control for cooperative automated vehicles JF - IEEE Transactions on Intelligent Transportation Systems N2 - Automated driving is now possible in diverse road and traffic conditions. However, there are still situations that automated vehicles cannot handle safely and efficiently. In this case, a Transition of Control (ToC) is necessary so that the driver takes control of the driving. Executing a ToC requires the driver to get full situation awareness of the driving environment. If the driver fails to get back the control in a limited time, a Minimum Risk Maneuver (MRM) is executed to bring the vehicle into a safe state (e.g., decelerating to full stop). The execution of ToCs requires some time and can cause traffic disruption and safety risks that increase if several vehicles execute ToCs/MRMs at similar times and in the same area. This study proposes to use novel C-ITS traffic management measures where the infrastructure exploits V2X communications to assist Connected and Automated Vehicles (CAVs) in the execution of ToCs. The infrastructure can suggest a spatial distribution of ToCs, and inform vehicles of the locations where they could execute a safe stop in case of MRM. This paper reports the first field operational tests that validate the feasibility and quantify the benefits of the proposed infrastructure-assisted ToC and MRM management. The paper also presents the CAV and roadside infrastructure prototypes implemented and used in the trials. The conducted field trials demonstrate that infrastructure-assisted traffic management solutions can reduce safety risks and traffic disruptions. KW - Automated driving KW - automated vehicles KW - connected automated vehicles KW - CAV KW - experimental evaluation Y1 - 2021 U6 - http://dx.doi.org/10.1109/TITS.2021.3061085 SN - 1524-9050 (Print) SN - 1558-0016 (Online) VL - 23 IS - 7 SP - 6720 EP - 6736 PB - IEEE ER - TY - JOUR A1 - Klomp, D. W. J. A1 - Bitz, Andreas A1 - Heerschap, A. A1 - Scheenen, T. W. J. T1 - Proton spectroscopic imaging of the human prostate at 7 T JF - NMR in Biomedicine Y1 - 2009 U6 - http://dx.doi.org/10.1002/nbm.1360 SN - 1099-1492 VL - 22 IS - 5 SP - 495 EP - 501 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 - JOUR A1 - Siepmann, Thomas A1 - Schuh, G. A1 - Levering, V. T1 - PROPLAN / Schuh, G.; Siepmann, Th.; Levering, V. JF - Handbook on architectures of information systems : with 24 tables / Peter Bernus ... (ed.) Y1 - 1998 SN - 3-540-64453-9 N1 - International handbooks on information systems ; 1 PB - Springer CY - Berlin [u.a.] ER - TY - JOUR A1 - Schiffer, Stefan A1 - Ferrein, Alexander A1 - Lakemeyer, Gerhard T1 - Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011) JF - Proceedings of the Fourth International Conference on Intelligent Robotics and Applications (ICIRA 2011) Y1 - 2010 SP - 1 EP - 10 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Procedures for the Determination of the Scattering Parameters for Network Analyzer Calibration JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 42 (1993), H. 2 Y1 - 1993 SN - 0018-9456 SP - 528 EP - 531 ER - TY - JOUR A1 - Hulsebosch, R. J. A1 - Günther, C. A1 - Horn, C. A1 - Holtmanns, S. A1 - Howker, K. A1 - Paterson, K. A1 - Claessens, J. A1 - Schuba, Marko ED - Mitchell, Chris J. T1 - Pioneering Advanced Mobile Privacy and Security JF - Security for mobility Y1 - 2004 SN - 9781849190886 U6 - http://dx.doi.org/10.1049/PBTE051E_ch N1 - IEE telecommunications series ; 51 SP - 383 EP - 432 PB - Institution of Electrical Engineers CY - London ER - TY - JOUR A1 - Claessens, J. A1 - Fuchsberger, A. A1 - Günther, C. A1 - Horn, G. A1 - Howker, K. A1 - Hulsebosch, R.J. A1 - Mitchell, C. A1 - Paterson, K. A1 - Preneel, B. A1 - Schellekens, D. A1 - Schuba, Marko T1 - Pioneering Advanced Mobile Privacy and Security Y1 - 2003 N1 - electronic proceedings of the 18th IFIP International Information Security Conference, Athens, Greece, May 2003 SP - 1 EP - 17 ER - TY - JOUR A1 - Prume, Klaus A1 - Muralt, P. A1 - Calame, F. A1 - Schmitz-Kempen, T. T1 - Piezoelectric thin films: evaluation of electrical and electromechanical characteristics for MEMS devices / Prume, K. ; Muralt, P. ; Calame, F. ; Schmitz-Kempen, T. ; Tiedke, S. ; JF - IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 54 (2007), H. 1 Y1 - 2007 SN - 0885-3010 SP - 81 EP - 14 ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Gudat, W. A1 - Kunz, C. T1 - Photoabsorption of alloys of Al with transition metals V, Fe, Ni and Cu and Pr near the Al L₂,₃-edge JF - Solid State Communications N2 - The onset of Al 2p transitions of VAl₃, FeAl, NiAl, NiAl₃, CuAl₂, PrAl₂ and the disordered alloys V-Al (16 at % Al, 28%, 41%), Fe-Al (11%) is shifted up to 1.1 eV. New pronounced structure develops close to the onset which for NiAl agrees with a density of states calculation by Connolly and Johnson. Y1 - 1974 SN - 0038-1098 U6 - http://dx.doi.org/10.1016/0038-1098(74)91165-X VL - 15 IS - 3 SP - 655 EP - 658 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Gudat, W. A1 - Kunz, C. T1 - Photoabsorption coefficient of alloys of Al with transition metals V, Fe, Ni and Cu and Pr from 30 to 150 eV photon energy JF - Physica status solidi b N2 - The absorption coefficient of VAI3, FeAI, NiAI, NiAl2, CuAI2, PrAl2, and of disordered V–AI (16 at% AI, 28%, 41%) and Fe–AI (11%) alloys has been measured in the region of the M₂,₃ absorption of the transition metals and the Labsorption of AI. The strong changes of the AI spectrum in the region of the 100 eV maximum upon alloying are explained as another evidence of the EXAFS (extended X-ray absorption fine structure) nature of these structures. The broad, prominent absorption peaks from the 3p excitations in V and Fe and from the 4d excitations in Pr are influenced only little on allyoing and thus appear to be of atomic origin. The fine structure at the onset of the Pr 4d transitions is identical in the metal and the alloy but differs from that of Pr oxide. The only M₂,₃ edge which is detectably shifted is that of Ni (up to 2.1 eV), whereas the onset of the AI L₂,₃ edge is shifted in all the alloys (up to 1.1 eV). The shifts are interpreted in accordance with X-ray fluorescence and nuclear resonance measurements as changes of the density of states in the valence band of the alloys. Y1 - 1976 SN - 0031-8957 U6 - http://dx.doi.org/10.1002/pssb.2220740211 N1 - weitere ISSN 0370-1972 VL - 74 IS - 2 SP - 507 EP - 521 PB - Wiley-VCH CY - Berlin ER - TY - JOUR A1 - Lagemaat, Miriam W. A1 - Vos, Eline K. A1 - Maas, Marnix C. A1 - Bitz, Andreas A1 - Orzada, Stephan A1 - Uden, Mark J. van A1 - Kobus, Thiele A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - Phosphorus magnetic resonance spectroscopic imaging at 7 T in patients with prostate cancer JF - Investigative Radiology N2 - Objectives The aim of this study was to identify characteristics of phosphorus (³¹P) spectra of the human prostate and to investigate changes of individual phospholipid metabolites in prostate cancer through in vivo ³¹P magnetic resonance spectroscopic imaging (MRSI) at 7 T. Materials and Methods In this institutional review board–approved study, 15 patients with biopsy-proven prostate cancer underwent T₂-weighted magnetic resonance imaging and 3-dimensional ³¹P MRSI at 7 T. Voxels were selected at the tumor location, in normal-appearing peripheral zone tissue, normal-appearing transition zone tissue, and in the base of the prostate close to the seminal vesicles. Phosphorus metabolite ratios were determined and compared between tissue types. Results Signals of phosphoethanolamine (PE) and phosphocholine (PC) were present and well resolved in most ³¹P spectra in the prostate. Glycerophosphocholine signals were observable in 43% of the voxels in malignant tissue, but in only 10% of the voxels in normal-appearing tissue away from the seminal vesicles. In many spectra, independent of tissue type, 2 peaks resonated in the chemical shift range of inorganic phosphate, possibly representing 2 separate pH compartments. The PC/PE ratio in the seminal vesicles was highly elevated compared with the prostate in 5 patients. A considerable overlap of ³¹P metabolite ratios was found between prostate cancer and normal-appearing prostate tissue, preventing direct discrimination of these tissues. The only 2 patients with high Gleason scores tumors (≥4+5) presented with high PC and glycerophosphocholine levels in their cancer lesions. Conclusions Phosphorus MRSI at 7 T shows distinct features of phospholipid metabolites in the prostate gland and its surrounding structures. In this exploratory study, no differences in ³¹P metabolite ratios were observed between prostate cancer and normal-appearing prostate tissue possibly because of the partial volume effects of small tumor foci in large MRSI voxels. Y1 - 2014 U6 - http://dx.doi.org/10.1097/RLI.0000000000000012 SN - 1536-0210 VL - 49 IS - 5 SP - 363 EP - 372 PB - Lippincott Williams & Wilkins CY - Philadelphia, Pa. ER - TY - JOUR A1 - Ritz, Thomas T1 - Personalized Information Services: Production and Distribution of these Services employing Mass-Customization Y1 - 2002 N1 - International Congress on Mass Media and Communications in the e-society of the 21st Century, Moskau, 17.-19.10.2002 ER - TY - JOUR A1 - Ritz, Thomas T1 - Personalized information services : an electronic information commodity and its production JF - International Journal of E-Business Strategy Management Y1 - 2000 SN - 1467-0305 VL - 2 IS - 2 ER - TY - JOUR A1 - Schuba, Marko A1 - Hermanns, Oliver T1 - Performance Investigations of the IP Multicast Architecture / Hermanns, Oliver ; Schuba, Marko JF - Performance of the IP Multicast Achitecture . Proceedings JENC 6. Proceedings of the 6th Joint European Networking Conference, Tel Aviv Y1 - 1995 N1 - Reprinted in Computer Networks and ISDN Systems 28 pp 429-439, 1996 SP - 121-1 EP - 121-8 ER - TY - JOUR A1 - Schuba, Marko A1 - Haverkort, Boudewijn R. A1 - Schneider, Gaby T1 - Performance evaluation of multicast communication in packet-switched networks / Schuba, Marko ; Haverkort, Boudewijn R. ; Schneider, Gaby JF - Performance Evaluation. 39 (2000), H. 1-4 Y1 - 2000 SN - 0166-5316 N1 - http://dx.doi.org/10.1016/S0166-5316(99)00058-9 SP - 61 EP - 80 ER - TY - JOUR A1 - Fiedler, Thomas M. A1 - Orzada, Stephan A1 - Flöser, Martina A1 - Rietsch, Stefan H. G. A1 - Schmidt, Simon A1 - Stelter, Jonathan K. A1 - Wittrich, Marco A1 - Quick, Harald H. A1 - Bitz, Andreas A1 - Ladd, Mark E. T1 - Performance and safety assessment of an integrated transmitarray for body imaging at 7 T under consideration of specificabsorption rate, tissue temperature, and thermal dose JF - NMR in Biomedicine N2 - In this study, the performance of an integrated body-imaging array for 7 T with 32 radiofrequency (RF) channels under consideration of local specific absorption rate (SAR), tissue temperature, and thermal dose limits was evaluated and the imaging performance was compared with a clinical 3 T body coil. Thirty-two transmit elements were placed in three rings between the bore liner and RF shield of the gradient coil. Slice-selective RF pulse optimizations for B1 shimming and spokes were performed for differently oriented slices in the body under consideration of realistic constraints for power and local SAR. To improve the B1+ homogeneity, safety assessments based on temperature and thermal dose were performed to possibly allow for higher input power for the pulse optimization than permissible with SAR limits. The results showed that using two spokes, the 7 T array outperformed the 3 T birdcage in all the considered regions of interest. However, a significantly higher SAR or lower duty cycle at 7 T is necessary in some cases to achieve similar B1+ homogeneity as at 3 T. The homogeneity in up to 50 cm-long coronal slices can particularly benefit from the high RF shim performance provided by the 32 RF channels. The thermal dose approach increases the allowable input power and the corresponding local SAR, in one example up to 100 W/kg, without limiting the exposure time necessary for an MR examination. In conclusion, the integrated antenna array at 7 T enables a clinical workflow for body imaging and comparable imaging performance to a conventional 3 T clinical body coil. KW - body imaging at 7 T MRI KW - thermal dose KW - tissue temperature KW - transmit antenna arrays Y1 - 2022 U6 - http://dx.doi.org/10.1002/nbm.4656 SN - 0952-3480 (Print) SN - 1099-1492 (Online) VL - 35 IS - 5 SP - 1 EP - 17 PB - Wiley ER - TY - JOUR A1 - Schuba, Marko T1 - Performance Analysis of Reliable Multicast Mechanisms for Widely Spread Distributed Applications in the Internet JF - International Conference on Parallel and Distributed Processing Techniques and Applications : PDPTA '99 ; June 28 - July 1, 1999, Las Vegas, Nevada, USA / ed.: Hamid R. Arabnia Y1 - 1999 SN - 1892512157 SP - 1 EP - 7 ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Geittner, P. T1 - PCVD hybrid technology for single mode fibres. Hagemann, H. J.; Geittner, P. JF - Proceedings : papers presented at: the 8th Annual European Fibre Optic Communications and Local Area Networks Exposition Y1 - 1990 N1 - EFOC LAN <8, 1990, München> SP - 67 EP - 72 ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Geittner, P. A1 - Warnier, J. A1 - Wilson, H. T1 - PCVD at high deposition rates. Geittner, P.; Hagemann, H. J.; Warnier, J.; Wilson, H. JF - Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 4 (1986), H. 7 Y1 - 1986 SN - 0733-8724 SP - 818 EP - 822 ER - TY - JOUR A1 - Ferrein, Alexander A1 - Böhnstedt, Lutz A1 - Lakemeyer, Gerhard T1 - Options in readylog reloaded -- generating decision-theoretic plan libraries in golog / Böhnstedt, Lutz ; Ferrein, Alexander ; Lakemeyer, Gerhard JF - KI 2007: advances in artificial intelligence : 30th Annual German Conference on AI, KI 2007, Osnabrück, Germany, September 10 - 13, 2007 ; proceedings Y1 - 2007 SN - 978-3-540-74564-8 N1 - Lecture Notes in Computer Science ; 4667 SP - 352 EP - 366 PB - Springer CY - Berlin ER - TY - JOUR A1 - Benkner, Thorsten T1 - Optimum Transmission Power in High Capacity Umbrella Cell Systems JF - Multiaccess, mobility and teletraffic : advances in wireless networks ; [proceedings of the Third Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications held in December 1997 in Melbourne, Australia] / ed. by David Everitt ... Y1 - 1998 SN - 0-7923-8091-6 N1 - Workshop on Multiaccess, Mobility and Teletraffic for Personal Communications <3, 1997, Melbourne> SP - 221 EP - 232 PB - Kluwer CY - Boston, Mass. [u.a.] ER - TY - JOUR A1 - Engels, Elmar A1 - Doege, E. T1 - Optimizing the number of strokes for punching machines using a fuzzy controlled electrohydraulic damping system / Doege, E. ; Engels, E. JF - ICME 98, CIRP International Seminar on Intelligent Computation in Manufacturing Engineering, Proceedings, Capri, IT, Jul 1-3, 1998 Y1 - 1998 SP - 471 EP - 478 CY - Capri ER - TY - JOUR A1 - Bank, Bart L. van de A1 - Orzada, Stephan A1 - Smits, Frits A1 - Lagemaat, Miriam W. A1 - Rodgers, Christopher T. A1 - Bitz, Andreas A1 - Scheenen, Tom W. J. T1 - Optimized (31) P MRS in the human brain at 7 T with a dedicated RF coil setup JF - NMR in Biomedicine Y1 - 2015 U6 - http://dx.doi.org/10.1002/nbm.3422 SN - 1099-1492 VL - 28 IS - 11 SP - 1570 EP - 1578 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Müller, Tim M. A1 - Leise, Philipp A1 - Lorenz, Imke-Sophie A1 - Altherr, Lena A1 - Pelz, Peter F. T1 - Optimization and validation of pumping system design and operation for water supply in high-rise buildings JF - Optimization and Engineering N2 - The application of mathematical optimization methods for water supply system design and operation provides the capacity to increase the energy efficiency and to lower the investment costs considerably. We present a system approach for the optimal design and operation of pumping systems in real-world high-rise buildings that is based on the usage of mixed-integer nonlinear and mixed-integer linear modeling approaches. In addition, we consider different booster station topologies, i.e. parallel and series-parallel central booster stations as well as decentral booster stations. To confirm the validity of the underlying optimization models with real-world system behavior, we additionally present validation results based on experiments conducted on a modularly constructed pumping test rig. Within the models we consider layout and control decisions for different load scenarios, leading to a Deterministic Equivalent of a two-stage stochastic optimization program. We use a piecewise linearization as well as a piecewise relaxation of the pumps’ characteristics to derive mixed-integer linear models. Besides the solution with off-the-shelf solvers, we present a problem specific exact solving algorithm to improve the computation time. Focusing on the efficient exploration of the solution space, we divide the problem into smaller subproblems, which partly can be cut off in the solution process. Furthermore, we discuss the performance and applicability of the solution approaches for real buildings and analyze the technical aspects of the solutions from an engineer’s point of view, keeping in mind the economically important trade-off between investment and operation costs. KW - Technical Operations Research KW - MINLP KW - MILP KW - Experimental validation KW - Pumping systems Y1 - 2020 U6 - http://dx.doi.org/10.1007/s11081-020-09553-4 SN - 1573-2924 VL - 2021 IS - 22 SP - 643 EP - 686 PB - Springer ER - TY - JOUR A1 - Sun, Hui A1 - Altherr, Lena A1 - Pei, Ji A1 - Pelz, Peter F. A1 - Yuan, Shouqi T1 - Optimal booster station design and operation under uncertain load JF - Applied Mechanics and Materials N2 - Given industrial applications, the costs for the operation and maintenance of a pump system typically far exceed its purchase price. For finding an optimal pump configuration which minimizes not only investment, but life-cycle costs, methods like Technical Operations Research which is based on Mixed-Integer Programming can be applied. However, during the planning phase, the designer is often faced with uncertain input data, e.g. future load demands can only be estimated. In this work, we deal with this uncertainty by developing a chance-constrained two-stage (CCTS) stochastic program. The design and operation of a booster station working under uncertain load demand are optimized to minimize total cost including purchase price, operation cost incurred by energy consumption and penalty cost resulting from water shortage. We find optimized system layouts using a sample average approximation (SAA) algorithm, and analyze the results for different risk levels of water shortage. By adjusting the risk level, the costs and performance range of the system can be balanced, and thus the system’s resilience can be engineered KW - Stochastic Programming KW - Chance Constraint KW - Engineering Application KW - Pump System KW - Water Distribution Y1 - 2018 U6 - http://dx.doi.org/10.4028/www.scientific.net/AMM.885.102 SN - 1662-7482 VL - 885 SP - 102 EP - 115 PB - Trans Tech Publications CY - Bäch ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Ungelenk, J. A1 - Wiechert, D. U. T1 - Optical time domain reflectometry (OTDR) of diameter modulations in single-mode fibers. Hagemann, H. J.; Ungelenk, J.; Wiechert, D. U. JF - Journal of Lightwave Technology (J-LT) / Institute of Electrical and Electronics Engineers (IEEE). 8 (1990), H. 11 Y1 - 1990 SN - 0733-8724 SP - 1641 EP - 1645 ER - TY - JOUR A1 - Hagemann, Hans-Jürgen A1 - Gudat, W. A1 - Kunz, C. T1 - Optical constants from the far infrared to the X-ray region: Mg, Al, Cu, Ag, Au, Bi, C, and Al₂O₃ JF - Journal of the Optical Society of America (JOSA) Y1 - 1975 SN - 0030-3941 U6 - http://dx.doi.org/10.1364/JOSA.65.000742 VL - 65 IS - 6 SP - 742 EP - 744 PB - Optical Society of America CY - New York 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 - Ferrein, Alexander A1 - Fritz, Christian A1 - Lakemeyer, Gerhard T1 - On-Line Decision-Theoretic Golog for Unpredictable Domains / Ferrein, Alexander ; Fritz, Christian ; Lakemeyer, Gerhard JF - KI 2004: Advances in Artificial Intelligence : 27th Annual German Conference on AI, KI 2004, Ulm, Germany, September 20-24, 2004. Proceedings Y1 - 2004 N1 - Lecture Notes in Computer Science ; 3238 SP - 322 EP - 336 PB - Springer CY - Berlin ER - TY - JOUR A1 - Ferrein, Alexander A1 - Steinbauer, Gerald T1 - On the Way to High-Level Programming for Resource-Limited Embedded Systems with Golog 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 - 229 EP - 240 ER - TY - JOUR A1 - Zastrow, Udo T1 - On the formulation of the fundamental solutions for orthotropic plane elasticity JF - Acta Mechanica. 57 (1985), H. 3-4 Y1 - 1985 SN - 1619-6937 SP - 113 EP - 122 ER - TY - JOUR A1 - Zastrow, Udo A1 - Hackl, Klaus T1 - On the existence, uniqueness and completeness of displacements and stress functions in linear elasticity / Hackl, Klaus ; Zastrow, Udo JF - Journal of Elasticity. 19 (1988), H. 1 Y1 - 1988 SN - 1573-2681 SP - 3 EP - 23 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - On the design of multimode integrated circuits in multilayered processes / Sadeghfam, A. ; Heuermann, H. JF - European Microwave Conference, 2007, 9-12 Oct. 2007 Y1 - 2007 SN - 978-2-87487-001-9 N1 - EuMC 2007 ; European Microwave Conference ; (37 : ; 2007.10.09-12 : ; Munich) SP - 516 EP - 519 ER - TY - JOUR A1 - Zastrow, Udo T1 - On the complete system of fundamental solutions for anisotropic slices and slabs: A comparison by use of the slab analogy JF - Journal of Elasticity. 15 (1985), H. 3 Y1 - 1985 SN - 1573-2681 SP - 293 EP - 318 ER - TY - JOUR A1 - Altherr, Lena A1 - Joggerst, Laura A1 - Leise, Philipp A1 - Pfetsch, Marc E. A1 - Schmitt, Andreas A1 - Wendt, Janine T1 - On obligations in the development process of resilient systems with algorithmic design methods JF - Applied Mechanics and Materials N2 - Advanced computational methods are needed both for the design of large systems and to compute high accuracy solutions. Such methods are efficient in computation, but the validation of results is very complex, and highly skilled auditors are needed to verify them. We investigate legal questions concerning obligations in the development phase, especially for technical systems developed using advanced methods. In particular, we consider methods of resilient and robust optimization. With these techniques, high performance solutions can be found, despite a high variety of input parameters. However, given the novelty of these methods, it is uncertain whether legal obligations are being met. The aim of this paper is to discuss if and how the choice of a specific computational method affects the developer’s product liability. The review of legal obligations in this paper is based on German law and focuses on the requirements that must be met during the design and development process. KW - legal obligations KW - product liability KW - design of technical systems KW - optimization KW - resilience Y1 - 2018 SN - 1662-7482 U6 - http://dx.doi.org/10.4028/www.scientific.net/AMM.885.240 VL - 885 IS - 885 SP - 240 EP - 252 PB - Trans Tech Publications CY - Bäch ER - TY - JOUR A1 - Schuba, Marko A1 - Reichl, Peter T1 - On large-scale reliable multicast protocols / Schuba, M. ; Reichl, P. JF - 6th IEE Conference on Telecommunications Y1 - 1998 SN - 0-85296-700-4 N1 - Conf. Publ. No. 451 SP - 133 EP - 137 ER - TY - JOUR A1 - Bitz, Andreas A1 - Zhou, Yi A1 - El Quardi, Abdessamad A1 - Streckert, Joachim T1 - Occupational Exposure at Mobile Communication Base Station Antenna Sites JF - Frequenz Y1 - 2009 U6 - http://dx.doi.org/10.1515/FREQ.2009.63.7-8.123 SN - 2191-6349 VL - 63 IS - 7-8 SP - 123 EP - 128 ER - TY - JOUR A1 - Samm, Doris A1 - Faissner, H. A1 - Frenzel, E. A1 - Heinrigs, W. T1 - Observation of the two-photon decay of a light penetrating particle / H. Faissner, E. Frenzel, W. Heinrigs, A. Preussger, D. Samm und U. Samm JF - Physics Letters B. Vol. 103 (1980), H. Issues 3 Y1 - 1980 SP - 234 EP - 240 ER - TY - JOUR A1 - Zastrow, Udo T1 - Numerical plane stress analysis by integral equations based on the singularity method JF - SM archives . 10 (1985) Y1 - 1985 SN - 0376-7426 SP - 113 EP - 128 ER - TY - JOUR A1 - Heuermann, Holger A1 - Thalayasingam, K. T1 - Novel vector non-linear measurement system for intermodulation measurements / Thalayasingam, K.; Heuermann, H. JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - European Microwave Conference ; (39 : ; 2009.09.29-10.01 : ; Rome) SP - 926 EP - 929 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan T1 - Novel theory and architecture of a vector signal generator implemented with two PLLs / Ibrahim, Irfan ; Heuermann, Holger JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 85 EP - 88 ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - Novel RF switch concepts for differential wireless communications frontends. Erkens, H.; Heuermann, H. JF - IEEE Transactions on Microwave Theory and Techniques. 54 (2006), H. 6, Part 1 Y1 - 2006 SN - 0018-9480 SP - 2376 EP - 2382 ER - TY - JOUR A1 - Heuermann, Holger A1 - Hillebrand, Jürgen A1 - Sadeghfam, Arash T1 - Novel Concept of a Digital SigmaDelta-PLL-Phase-Shift-Modulator / Hillebrand, Jürgen ; Sadeghfam, Arash ; Heuermann, Holger Y1 - 2008 SN - 978-3-8007-3086-5 N1 - Microwave Conference (GeMIC), 2008 German SP - 123 EP - 126 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Novel balanced inductor for compact differential systems / Sadeghfam, Arash; Heuermann, Holger JF - 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 Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 709 EP - 712 PB - Horizon House Publ. CY - London ER -