@inproceedings{SpaeteHafnerSchwarzer2000, author = {Sp{\"a}te, Frank and Hafner, B. and Schwarzer, Klemens}, title = {A system for solar process heat for decentralized applications in developing countries}, series = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3}, booktitle = {ISES 1999 Solar World Congress, Jerusalem, Israel, July 4-9, 1999 : conference proceedings / ed. Gershon Grossman. Vol. 3}, publisher = {Elsevier}, address = {Oxford}, isbn = {0-080-043895-4}, pages = {236 -- 291}, year = {2000}, 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{WissenbachSixBongaertsetal.1995, author = {Wissenbach, U. and Six, S. and Bongaerts, Johannes and Ternes, D. and Steinwachs, S. and Unden, G.}, title = {A third periplasmic transport system for l-arginine in Escherichia coli: molecular characterization of the artPIQMJ genes, arginine binding and transport}, series = {Molecular microbiology}, volume = {Vol. 17}, journal = {Molecular microbiology}, number = {Iss. 4}, issn = {1365-2958 (E-Journal); 0950-382x (Print)}, pages = {675 -- 686}, year = {1995}, language = {en} } @article{GebhardtJarkeJacobs1997, author = {Gebhardt, Michael and Jarke, Matthias and Jacobs, Stephan}, title = {A Toolkit for Negotiation Support Interfaces to Multidimensional Data}, series = {SIGMOD 1997 : proceedings ACM SIGMOD International Conference on Management of Data, May 13 - 15, 1997, Tucson, Arizona, USA / ed. by Joan M. Peckman}, journal = {SIGMOD 1997 : proceedings ACM SIGMOD International Conference on Management of Data, May 13 - 15, 1997, Tucson, Arizona, USA / ed. by Joan M. Peckman}, publisher = {ACM Press}, address = {New York, NY}, isbn = {0897919114}, pages = {XIV, 586 S : Ill., graph. Darst.}, year = {1997}, language = {en} } @article{Jochim2004, author = {Jochim, Haldor E.}, title = {A traffic resistance model of long-distance travel}, series = {Networks for mobility : 2nd international symposium, September 29 - October 1, 2004, Stuttgart, Germany ; proceedings ; abstracts and CD-ROM / [2nd International Symposium on Networks for Mobility]. FOVUS, Centre of Transportation Research, University of}, journal = {Networks for mobility : 2nd international symposium, September 29 - October 1, 2004, Stuttgart, Germany ; proceedings ; abstracts and CD-ROM / [2nd International Symposium on Networks for Mobility]. FOVUS, Centre of Transportation Research, University of}, publisher = {FOVUS}, address = {Stuttgart}, isbn = {3-89301-180-3}, pages = {X, 84 S. : graph. Darst. + 1 CD-ROM}, year = {2004}, 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} } @article{SelmerThamerCirpusetal.2003, author = {Selmer, Thorsten and Thamer, Wiebke and Cirpus, Irina and Hans, Marcus}, title = {A two [4Fe-4S]-cluster-containing ferredoxin as an alternative electron donor for 2-hydroxyglutaryl-CoA dehydratase from Acidaminococcus fermentans / Thamer, Wiebke ; Cirpus, Irina ; Hans, Marcus ; Pierik, Antonio, J. ; Selmer, Thorsten ; Bill, Eckhard ;}, series = {Archives of Microbiology. 179 (2003), H. 3}, journal = {Archives of Microbiology. 179 (2003), H. 3}, isbn = {1432-072X}, pages = {197 -- 204}, year = {2003}, language = {en} } @article{HardtKoehlerMuelleretal.1980, author = {Hardt, Arno and K{\"o}hler, M. and M{\"u}ller, K. D. and Stoff, H.}, title = {A two-dimensional position sensitive charged-particle detector for the magnetic spectrograph "BIG KARL" of the J{\"u}lich Cyclotron "JULIC". M. K{\"o}hler, K. D. M{\"u}ller, H. Stoff, M. Teske, G. P. A. Berg, A. Hardt, S. Martin, C. Mayer-B{\"o}ricke , J. Meißburger}, series = {Nuclear Instruments and Methods. 75 (1980), H. 2-3}, journal = {Nuclear Instruments and Methods. 75 (1980), H. 2-3}, isbn = {0029-554X}, pages = {357 -- 362}, year = {1980}, 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} } @article{StockMalindretosIndlekoferetal.2001, author = {Stock, J. and Malindretos, J. and Indlekofer, K.M. and P{\"o}ttgens, Michael and F{\"o}rster, Arnold and L{\"u}th, Hans}, title = {A Vertical Resonant Tunneling Transistor for Application in Digital Logic Circuits}, series = {IEEE Transactions on Electron Devices (T-ED). 48 (2001), H. 6}, journal = {IEEE Transactions on Electron Devices (T-ED). 48 (2001), H. 6}, isbn = {0018-9383}, pages = {1028 -- 1032}, year = {2001}, language = {en} } @article{BergmannDemuthSander2011, author = {Bergmann, Sandra and Demuth, Bastian and Sander, Volker}, title = {A Web Framework for Workflow Submission and Monitoring via UNICORE 6 based on Distributable Scientific Workflow Templates}, series = {UNICORE Summit 2011 : proceedings, 7-8 July 2011, Torun, Poland / Mathilde Romberg ... (Eds.)}, journal = {UNICORE Summit 2011 : proceedings, 7-8 July 2011, Torun, Poland / Mathilde Romberg ... (Eds.)}, publisher = {Forschungszentrum J{\"u}lich}, address = {J{\"u}lich}, isbn = {9783893367504}, pages = {45 -- 50}, year = {2011}, language = {en} } @article{SimonisKringsLuethetal.2001, author = {Simonis, A. and Krings, T. and L{\"u}th, H. and Wang, J. and Sch{\"o}ning, Michael Josef}, title = {A „hybrid" thin-film pH sensor with integrated thick-film reference}, series = {Sensors. 1 (2001), H. 6}, journal = {Sensors. 1 (2001), H. 6}, isbn = {1424-8220}, pages = {183 -- 192}, year = {2001}, language = {en} } @article{PawelkeSchmittMeissen1990, author = {Pawelke, Siegfried and Schmitt, W. and Meissen, Th.}, title = {Aachen 3D finger. 3D digitizer for application in dentistry / Schmitt, W. ; Pawelke, S. ; Meissen, Th.}, series = {Biomedizinische Technik. 35 (1990), H. 4}, journal = {Biomedizinische Technik. 35 (1990), H. 4}, isbn = {0013-5585}, pages = {69 -- 71}, year = {1990}, language = {en} } @article{Naujokat2002, author = {Naujokat, Anke}, title = {Aachen: Colourdome}, series = {Bauwelt. 93 (2002), H. 37}, journal = {Bauwelt. 93 (2002), H. 37}, isbn = {0931-6590}, pages = {2}, year = {2002}, language = {en} } @inproceedings{EvansBraunUlmeretal.2022, author = {Evans, Benjamin and Braun, Sebastian and Ulmer, Jessica and Wollert, J{\"o}rg}, title = {AAS implementations - current problems and solutions}, series = {20th International Conference on Mechatronics - Mechatronika (ME)}, booktitle = {20th International Conference on Mechatronics - Mechatronika (ME)}, publisher = {IEEE}, isbn = {978-1-6654-1040-3}, doi = {10.1109/ME54704.2022.9982933}, pages = {6 Seiten}, year = {2022}, abstract = {The fourth industrial revolution presents a multitude of challenges for industries, one of which being the increased flexibility required of manufacturing lines as a result of increased consumer demand for individualised products. One solution to tackle this challenge is the digital twin, more specifically the standardised model of a digital twin also known as the asset administration shell. The standardisation of an industry wide communications tool is a critical step in enabling inter-company operations. This paper discusses the current state of asset administration shells, the frameworks used to host them and their problems that need to be addressed. To tackle these issues, we propose an event-based server capable of drastically reducing response times between assets and asset administration shells and a multi-agent system used for the orchestration and deployment of the shells in the field.}, language = {en} } @article{SchoeningKloock2007, author = {Sch{\"o}ning, Michael Josef and Kloock, Joachim P.}, title = {About 20 years of silicon-based thin-film sensors with chalcogenide glass materials for heavy metal analysis: Technological aspects of fabrication and miniaturization}, series = {Electroanalysis. 19 (2007), H. 19-20}, journal = {Electroanalysis. 19 (2007), H. 19-20}, isbn = {1040-0397}, pages = {2029 -- 2038}, year = {2007}, language = {en} } @inproceedings{GerhardsSanderBelloum2012, author = {Gerhards, Michael and Sander, Volker and Belloum, Adam}, title = {About the flexible Migration of Workflow Tasks to Clouds : Combining on- and off-premise Executions of Applications}, series = {CLOUD COMPUTING 2012 : The Third International Conference on Cloud Computing, GRIDs, and Virtualization ; July 22-27, 2012 - Nice, France}, booktitle = {CLOUD COMPUTING 2012 : The Third International Conference on Cloud Computing, GRIDs, and Virtualization ; July 22-27, 2012 - Nice, France}, editor = {Zimmermann, Wolf and Lee, Yong Woo and Demchenko, Yuri}, publisher = {IARIA Journals}, isbn = {978-1-61208-216-5}, pages = {82 -- 87}, year = {2012}, abstract = {An increasing number of applications target their executions on specific hardware like general purpose Graphics Processing Units. Some Cloud Computing providers offer this specific hardware so that organizations can rent such resources. However, outsourcing the whole application to the Cloud causes avoidable costs if only some parts of the application benefit from the specific expensive hardware. A partial execution of applications in the Cloud is a tradeoff between costs and efficiency. This paper addresses the demand for a consistent framework that allows for a mixture of on- and off-premise calculations by migrating only specific parts to a Cloud. It uses the concept of workflows to present how individual workflow tasks can be migrated to the Cloud whereas the remaining tasks are executed on-premise.}, language = {en} } @article{BoehnischBraunMuscarelloetal.2024, author = {B{\"o}hnisch, Nils and Braun, Carsten and Muscarello, Vincenzo and Marzocca, Pier}, title = {About the wing and whirl flutter of a slender wing-propeller system}, series = {Journal of Aircraft}, journal = {Journal of Aircraft}, publisher = {American Institute of Aeronautics and Astronautics}, issn = {1533-3868}, doi = {10.2514/1.C037542}, pages = {1 -- 14}, year = {2024}, abstract = {Next-generation aircraft designs often incorporate multiple large propellers attached along the wingspan (distributed electric propulsion), leading to highly flexible dynamic systems that can exhibit aeroelastic instabilities. This paper introduces a validated methodology to investigate the aeroelastic instabilities of wing-propeller systems and to understand the dynamic mechanism leading to wing and whirl flutter and transition from one to the other. Factors such as nacelle positions along the wing span and chord and its propulsion system mounting stiffness are considered. Additionally, preliminary design guidelines are proposed for flutter-free wing-propeller systems applicable to novel aircraft designs. The study demonstrates how the critical speed of the wing-propeller systems is influenced by the mounting stiffness and propeller position. Weak mounting stiffnesses result in whirl flutter, while hard mounting stiffnesses lead to wing flutter. For the latter, the position of the propeller along the wing span may change the wing mode shapes and thus the flutter mechanism. Propeller positions closer to the wing tip enhance stability, but pusher configurations are more critical due to the mass distribution behind the elastic axis.}, language = {en} }