@article{Foerster2000, author = {F{\"o}rster, Arnold}, title = {Resonant tunneling diodes operating as modern quantum transport devices}, series = {Proceedings of the Tenth International Workshop on the Physics of Semiconductor Devices : (December 14 - 18, 1999) / ed.: Vikram Kumar ... - Vol. 2}, journal = {Proceedings of the Tenth International Workshop on the Physics of Semiconductor Devices : (December 14 - 18, 1999) / ed.: Vikram Kumar ... - Vol. 2}, publisher = {Allied Publ.}, address = {New Delhi [u.a.]}, isbn = {81-7023-998-2}, pages = {966 -- 966}, year = {2000}, language = {en} } @article{Foerster1995, author = {F{\"o}rster, Arnold}, title = {Ultrahigh frequency measurements of magnetic penetration length and surface impedance of YBa2Cu3O7-x microstriplines on Si and GaAs substrates . R{\"u}ders, F; Hollricher, O.; Copetti, C. A. ; F{\"o}rster, A. ; Buchal, Ch. ; Prusseit, W. ; Kinder, H.}, series = {Journal of Applied Physics. 77 (1995), H. 10}, journal = {Journal of Applied Physics. 77 (1995), H. 10}, isbn = {1089-7550}, pages = {5282 -- 5286}, year = {1995}, language = {en} } @article{FritzscheFaberSchwarzer2002, author = {Fritzsche, Ulrich and Faber, Christian and Schwarzer, Klemens}, title = {Vergleich der Ergebnisse des quasidynamischen und station{\"a}ren Kollektortests nach En 12975-2}, series = {Zw{\"o}lftes Symposium Thermische Solarenergie : 24. bis 26. April 2002 / [wiss. Gesamtleitung: Volker Wittwer. Veranst.: OTTI-Energie-Kolleg. Mitveranst.: Arbeitsgemeinschaft Kommunaler Versorgungsunternehmen zur Sparsamen Ernergie- und Wasserverwendung (ASEW), K{\"o}ln ...]}, journal = {Zw{\"o}lftes Symposium Thermische Solarenergie : 24. bis 26. April 2002 / [wiss. Gesamtleitung: Volker Wittwer. Veranst.: OTTI-Energie-Kolleg. Mitveranst.: Arbeitsgemeinschaft Kommunaler Versorgungsunternehmen zur Sparsamen Ernergie- und Wasserverwendung (ASEW), K{\"o}ln ...]}, publisher = {OTTI-Energie-Kolleg}, address = {Regensburg}, isbn = {3-934681-20-4}, pages = {135 -- 139}, year = {2002}, language = {de} } @misc{FrauenrathRenzRiegeretal.2010, author = {Frauenrath, Tobias and Renz, Wolfgang and Rieger, Jan and G{\"o}mmel, Andreas and Butenweg, Christoph and Niendorf, Thoralf}, title = {High Spatial Resolution 3D MRI of the Larynx Using a Dedicated TX/RX Phased Array Coil at 7.0T}, series = {2010 ISMRM-ESMRMB joint annual meeting}, journal = {2010 ISMRM-ESMRMB joint annual meeting}, issn = {1545-4428}, year = {2010}, abstract = {MRI holds great potential for elucidating laryngeal and vocal fold anatomy together with the assessment of physiological processes associated in human phonation. However, MRI of human phonation remains very challenging due to the small size of the targeted structures, interfering signal from fat, air between the vocal folds and surrounding muscles and physiological motion. These anatomical/physiological constraints translate into stringent technical requirements in balancing, scan time, image contrast, immunity to physiological motion, temporal resolution and spatial resolution. Motivated by these challenges and limitations this study is aiming at translating the sensitivity gain at ultra-high magnetic fields for enhanced high spatial resolution 3D imaging of the larynx and vocal tract. To approach this goal a dedicated two channel TX/RX larynx coil is being proposed.}, language = {en} } @article{FrauenrathHezelHeinrichsetal.2009, author = {Frauenrath, Tobias and Hezel, Fabian and Heinrichs, Uwe and Kozerke, Sebastian and Utting, Jane and Kob, Malte and Butenweg, Christoph and Boesiger, Peter and Niendorf, Thoralf}, title = {Feasibility of Cardiac Gating Free of Interference With Electro-Magnetic Fields at 1.5 Tesla, 3.0 Tesla and 7.0 Tesla Using an MR-Stethoscope}, series = {Investigative Radiology}, volume = {44}, journal = {Investigative Radiology}, number = {9}, publisher = {Lippincott Williams \& Wilkins ; (via Ovid)}, address = {Philadelphia, Pa}, issn = {1536-0210 (online)}, doi = {10.1097/RLI.0b013e3181b4c15e}, pages = {539 -- 547}, year = {2009}, language = {en} } @inproceedings{FrauenrathGoemmelButenwegetal.2010, author = {Frauenrath, Tobias and G{\"o}mmel, Andreas and Butenweg, Christoph and Otten, Mario and Niendorf, Thoralf}, title = {3D mapping of vocal fold geometry during articulatory maneuvers using ultrashort echo time imaging at 3.0 T}, series = {ISMRM-ESMRMB joint annual meeting 2010, Band 4}, booktitle = {ISMRM-ESMRMB joint annual meeting 2010, Band 4}, publisher = {Curran}, address = {Red Hook, NY}, organization = {International Society of Magnetic Resonance in Medicine}, isbn = {978-1-617-82008-3}, pages = {3087}, year = {2010}, language = {en} } @misc{FrauenrathDieringerPateletal.2011, author = {Frauenrath, Tobias and Dieringer, Matthias and Patel, Nishant and Zerdem, Celal and Hentschel, Jan and Renz, Wolfgang and Niendorf, Thoralf}, title = {From Artifact to Merit: Cardiac Gated MRI at 7T \& 3T using Magneto-Hydrodynamic Effects for Synchronization}, series = {2011 ISMRM Annual Meeting Proceedings}, journal = {2011 ISMRM Annual Meeting Proceedings}, issn = {1545-4428}, year = {2011}, abstract = {ECG is corrupted by magneto-hydrodynamic effects at higher magnetic field strength. Artifacts in the ECG trace and severe T-wave elevation might be mis-interpreted as R-waves. MHD being inherently sensitive to blood flow and blood velocity provides an alternative approach for cardiac gating, even in peripheral target areas far away from the commonly used upper torso positions of ECG electrodes. This feature would be very beneficial to address traveling time induced motion artifacts and trigger latency related issues raised by ECG-gated peripheral MR angiography. For all those reasons, this work proposes the use of MHD-trigger for cardiac gated MR.}, language = {en} } @misc{FrauenrathdeGeyerd'OrthNiendorf2011, author = {Frauenrath, Tobias and de Geyer d'Orth, Thibaut and Niendorf, Thoralf}, title = {Assessment of Accuracy \& Reproducibility of ECG, Pulse Oximetry \& Phonocardiogram Gating of Cardiac MRI at 7T}, series = {2011 ISMRM Annual Meeting Proceedings}, journal = {2011 ISMRM Annual Meeting Proceedings}, issn = {1545-4428}, year = {2011}, abstract = {At (ultra)high magnetic fields the artifact sensitivity of ECG recordings increases. This bears the risk of R-wave mis-registration which has been consistently reported for ECG triggered CMR at 7.0T. Realizing the constraints of conventional ECG, acoustic cardiac triggering (ACT) has been proposed. The clinical ACT has not been carefully examined yet. For this reason, this work scrutinizes the suitability, accuracy and reproducibility of ACT for CMR at 7.0T. For this purpose, the trigger reliability and trigger detection variance are examined together with an qualitative and quantitative assessment of image quality of the heart at 7.0T.}, language = {en} } @misc{FrauenrathBeckerHezeletal.2010, author = {Frauenrath, Tobias and Becker, Meike and Hezel, Fabian and Krombach, Gabriele A. and Kremer, Ute and Schulz-Menger, Jeanette and Niendorf, Thoralf}, title = {Comparison of Left Function Assessment Using Phonocardiogram and Electrocardiogram Triggered 2D SSFP CINE MR Imaging at 1.5 T and 3.0 T}, series = {2010 ISMRM-ESMRMB joint annual meeting}, journal = {2010 ISMRM-ESMRMB joint annual meeting}, issn = {1545-4428}, year = {2010}, abstract = {As high-field cardiac MRI (CMR) becomes more widespread the propensity of ECG to distortions and mistriggering increases and with it the motivation for a cardiac triggering alternative. Hence, this study explores the suitability of acoustic cardiac triggering (ACT) for left ventricular (LV) function assessment in healthy subjects at 1.5T and 3.0T.}, language = {en} } @article{FleischhakerKraussSchaettigeretal.2013, author = {Fleischhaker, Robert and Krauß, Nico and Sch{\"a}ttiger, Farina and Dekorsy, Thomas}, title = {Consistent characterization of semiconductor saturable absorber mirrors with singe-pulse and pump-probe spectroscopy}, series = {Optics Express}, volume = {21}, journal = {Optics Express}, number = {6}, publisher = {Optica}, address = {Washington, DC}, issn = {1094-4087}, doi = {10.1364/OE.21.006764}, pages = {6764 -- 6776}, year = {2013}, language = {en} } @article{FleischhakerEversDey2010, author = {Fleischhaker, Robert and Evers, J{\"o}rg and Dey, Tarak N.}, title = {Phase modulation induced by cooperative effects in electromagnetically induced transparency}, series = {Physical Review A - Atomic, molecular, and optical physics}, volume = {82}, journal = {Physical Review A - Atomic, molecular, and optical physics}, number = {1}, publisher = {AIP Publishing}, address = {Melville, NY}, issn = {1050-2947}, doi = {10.1103/PhysRevA.82.013815}, pages = {013815}, year = {2010}, abstract = {We analyze the influence of dipole-dipole interactions in an electromagnetically induced transparency set up for a density at the onset of cooperative effects. To this end, we include mean-field models for the influence of local-field corrections and radiation trapping into our calculation. We show both analytically and numerically that the polarization contribution to the local field strongly modulates the phase of a weak pulse. We give an intuitive explanation for this local-field-induced phase modulation and demonstrate that it distinctively differs from the nonlinear self-phase-modulation that a strong pulse experiences in a Kerr medium.}, language = {en} } @article{FleischhakerEvers2011, author = {Fleischhaker, Robert and Evers, J{\"o}rg}, title = {A Maxwell-Schr{\"o}dinger solver for quantum optical few-level systems}, series = {Computer Physics Communications}, volume = {182}, journal = {Computer Physics Communications}, number = {3}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0010-4655}, doi = {10.1016/j.cpc.2010.10.018}, pages = {739 -- 747}, year = {2011}, abstract = {The msprop program presented in this work is capable of solving the Maxwell-Schr{\"o}dinger equations for one or several laser fields propagating through a medium of quantum optical few-level systems in one spatial dimension and in time. In particular, it allows to numerically treat systems in which a laser field interacts with the medium with both its electric and magnetic component at the same time. The internal dynamics of the few-level system is modeled by a quantum optical master equation which includes coherent processes due to optical transitions driven by the laser fields as well as incoherent processes due to decay and dephasing. The propagation dynamics of the laser fields is treated in slowly varying envelope approximation resulting in a first order wave equation for each laser field envelope function. The program employs an Adams predictor formula second order in time to integrate the quantum optical master equation and a Lax-Wendroff scheme second order in space and time to evolve the wave equations for the fields. The source function in the Lax-Wendroff scheme is specifically adapted to allow taking into account the simultaneous coupling of a laser field to the polarization and the magnetization of the medium. To reduce execution time, a customized data structure is implemented and explained. In three examples the features of the program are demonstrated and the treatment of a system with a phase-dependent cross coupling of the electric and magnetic field component of a laser field is shown.}, language = {en} } @article{FleischhakerEvers2008, author = {Fleischhaker, Robert and Evers, J{\"o}rg}, title = {Nonlinear effects in pulse propagation through Doppler-broadened closed-loop atomic media}, series = {Physical Review A - Atomic, molecular, and optical physics}, volume = {77}, journal = {Physical Review A - Atomic, molecular, and optical physics}, number = {4}, issn = {1050-2947}, doi = {10.1103/PhysRevA.77.043805}, pages = {043805}, year = {2008}, language = {en} } @article{FleischhakerEvers2008, author = {Fleischhaker, Robert and Evers, J{\"o}rg}, title = {Four-wave mixing enhanced white-light cavity}, series = {Physical Review A - Atomic, molecular, and optical physics}, volume = {78}, journal = {Physical Review A - Atomic, molecular, and optical physics}, number = {5}, issn = {0556-2791}, pages = {051802(R)}, year = {2008}, language = {en} } @phdthesis{Fleischhaker2009, author = {Fleischhaker, Robert}, title = {Light propagation in dense and chiral media}, year = {2009}, language = {en} } @article{FischerDoerenJanke1981, author = {Fischer, W. A. and D{\"o}ren, Horst-Peter and Janke, Dieter}, title = {Aluminium nitride probes for application in iron melts}, series = {Archiv f{\"u}r das Eisenh{\"u}ttenwesen. 52 (1981), H. 3}, journal = {Archiv f{\"u}r das Eisenh{\"u}ttenwesen. 52 (1981), H. 3}, issn = {0003-8962}, pages = {91 -- 98}, year = {1981}, language = {en} } @inproceedings{FeldhusenBrezingPuetzetal.2010, author = {Feldhusen, J{\"o}rg and Brezing, Alexander Nikolaus and P{\"u}tz, Claus and W{\"a}hlisch, Georg}, title = {Multi-system CAD-teaching in large classes}, series = {When design education and design research meet : proceedings of the 12th International Conference on Engineering and Product Design Education, Norwegian University of Science and Technology (NTNU) Trondheim, Norway, 2nd - 3rd September 2010 ; [E\&PDE]}, booktitle = {When design education and design research meet : proceedings of the 12th International Conference on Engineering and Product Design Education, Norwegian University of Science and Technology (NTNU) Trondheim, Norway, 2nd - 3rd September 2010 ; [E\&PDE]}, publisher = {Design Society}, address = {Glasgow}, organization = {International Conference on Engineering and Product Design Education <12, 2010, Trondheim>}, isbn = {978-1-904670-19-3}, pages = {204 -- 209}, year = {2010}, language = {en} } @article{FaberFritzscheSchwarzer2002, author = {Faber, Christian and Fritzsche, Ulrich and Schwarzer, Klemens}, title = {Vergleich der Ergebnisse des quasidynamischen und station{\"a}ren Kollektortests nach En 12975-2 / Fritzsche, Ulrich ; Faber, Christian ; Schwarzer, Klemens}, series = {Zw{\"o}lftes Symposium Thermische Solarenergie : 24. bis 26. April 2002 / [wiss. Gesamtleitung: Volker Wittwer. Veranst.: OTTI-Energie-Kolleg. Mitveranst.: Arbeitsgemeinschaft Kommunaler Versorgungsunternehmen zur Sparsamen Ernergie- und Wasserverwendung (ASEW), K{\"o}ln ...]}, journal = {Zw{\"o}lftes Symposium Thermische Solarenergie : 24. bis 26. April 2002 / [wiss. Gesamtleitung: Volker Wittwer. Veranst.: OTTI-Energie-Kolleg. Mitveranst.: Arbeitsgemeinschaft Kommunaler Versorgungsunternehmen zur Sparsamen Ernergie- und Wasserverwendung (ASEW), K{\"o}ln ...]}, publisher = {OTTI-Energie-Kolleg}, address = {Regensburg}, isbn = {3-934681-20-4}, pages = {135 -- 139}, year = {2002}, language = {de} } @book{Faber1993, author = {Faber, Christian}, title = {Berechnung der Schallausbreitung in durchstr{\"o}mten Kan{\"a}len von Turbomaschinen unter besonderer Ber{\"u}cksichtigung der Auslegung von Drehtonschalld{\"a}mpfern}, publisher = {Shaker}, address = {Aachen}, isbn = {3-86111-626-X}, pages = {XX, 222 S. : graph. Darst.}, year = {1993}, language = {de} } @article{Faber2001, author = {Faber, Christian}, title = {Zukunftsf{\"a}higkeit als Leitbild f{\"u}r die Ziele des Solar-Instituts J{\"u}lich, SIJ}, series = {Farbe bekennen - f{\"u}r ein weltoffenes, solidarisches NRW / Landesarbeitsgemeinschaft von Dritte-Welt-Zentren und -Koordinationsstellen in NRW (LAG3W) (Hg.). Red.: Petra Leber}, journal = {Farbe bekennen - f{\"u}r ein weltoffenes, solidarisches NRW / Landesarbeitsgemeinschaft von Dritte-Welt-Zentren und -Koordinationsstellen in NRW (LAG3W) (Hg.). Red.: Petra Leber}, publisher = {Lit}, address = {M{\"u}nster [u.a.]}, isbn = {3-8258-5843-X}, pages = {119 -- 122}, year = {2001}, language = {de} } @article{EweKleinPieperetal.2009, author = {Ewe, Hendrik and Klein, Peter and Pieper, Martin and F{\"u}ldner, G.}, title = {Heat conductivity in sintered aluminium fibers}, series = {Cellular metals for structural and functional applications : CELLMET 2008 ; proceedings of the International Symposium on Cellular Metals for Structural and Functional Applications held October 8 - 10, 2008 in Dresden, Germany / ed. by G{\"u}nter Stephani}, journal = {Cellular metals for structural and functional applications : CELLMET 2008 ; proceedings of the International Symposium on Cellular Metals for Structural and Functional Applications held October 8 - 10, 2008 in Dresden, Germany / ed. by G{\"u}nter Stephani}, publisher = {Fraunhofer IFAM}, address = {Dresden}, pages = {187 -- 193}, year = {2009}, language = {en} } @incollection{EversFleischhakerPalffyetal.2010, author = {Evers, J{\"o}rg and Fleischhaker, Robert and P{\´a}lffy, A. and Keitel, C.}, title = {Light propagation : From atomic to nuclear quantum optics}, series = {Modern optics and photonics: atoms and structured media}, booktitle = {Modern optics and photonics: atoms and structured media}, publisher = {World Scientific Publishing Co.}, isbn = {978-981431327-8}, doi = {10.1142/9789814313278_0001}, pages = {3 -- 15}, year = {2010}, language = {en} } @misc{ErkKlefischStellbergetal.2006, author = {Erk, Daniel and Klefisch, Andrea and Stellberg, Michael and Zimmer, Dirk}, title = {R{\"u}ckenlehne f{\"u}r einen Fahrzeugsitz}, year = {2006}, language = {de} } @inproceedings{ElDeibChudobaButenwegetal.2002, author = {El-Deib, Khaled and Chudoba, Rostislav and Butenweg, Christoph and Meskouris, Konstantin and K{\"o}nke, Carsten and Bettzieche, Volker}, title = {Safety assessment of rockfill and masonry dams}, series = {Structural dynamics - EURODYN 2002 : proceedings of the 4th [i.e. 5th] International Conference on Structural Dynamics, Munich, Germany, 2 - 5 September 2002 / ed. by H. Grundmann ... Vol. 1}, booktitle = {Structural dynamics - EURODYN 2002 : proceedings of the 4th [i.e. 5th] International Conference on Structural Dynamics, Munich, Germany, 2 - 5 September 2002 / ed. by H. Grundmann ... Vol. 1}, publisher = {Balkema}, address = {Lisse}, organization = {International Conference on Structural Dynamics <5, 2002, M{\"u}nchen>}, isbn = {90-5809-510-X}, pages = {237 -- 242}, year = {2002}, language = {en} } @article{ElDeibButenwegKlinkel2020, author = {El-Deib, Khaled and Butenweg, Christoph and Klinkel, Sven}, title = {Erdbebennachweis von Mauerwerksbauten mit realistischen Modellen und erh{\"o}hten Verhaltensbeiwerten}, series = {Bautechnik}, volume = {97}, journal = {Bautechnik}, number = {11}, publisher = {Ernst \& Sohn}, address = {Berlin}, doi = {10.1002/bate.202000016}, pages = {756 -- 765}, year = {2020}, abstract = {Die Anwendung des linearen Nachweiskonzepts auf Mauerwerksbauten f{\"u}hrt dazu, dass bereits heute Standsicherheitsnachweise f{\"u}r Geb{\"a}ude mit {\"u}blichen Grundrissen in Gebieten mit moderaten Erdbebeneinwirkungen nicht mehr gef{\"u}hrt werden k{\"o}nnen. Diese Problematik wird sich in Deutschland mit der Einf{\"u}hrung kontinuierlicher probabilistischer Erdbebenkarten weiter versch{\"a}rfen. Aufgrund der Erh{\"o}hung der seismischen Einwirkungen, die sich vielerorts ergibt, ist es erforderlich, die vorhandenen, bislang nicht ber{\"u}cksichtigten Tragf{\"a}higkeitsreserven in nachvollziehbaren Nachweiskonzepten in der Baupraxis verf{\"u}gbar zu machen. Der vorliegende Beitrag stellt ein Konzept f{\"u}r die geb{\"a}udespezifische Ermittlung von erh{\"o}hten Verhaltensbeiwerten vor. Die Verhaltensbeiwerte setzen sich aus drei Anteilen zusammen, mit denen die Lastumverteilung im Grundriss, die Verformungsf{\"a}higkeit und Energiedissipation sowie die {\"U}berfestigkeiten ber{\"u}cksichtigt werden. F{\"u}r die rechnerische Ermittlung dieser drei Anteile wird ein nichtlineares Nachweiskonzept auf Grundlage von Pushover-Analysen vorgeschlagen, in denen die Interaktionen von W{\"a}nden und Geschossdecken durch einen Einspanngrad beschrieben werden. F{\"u}r die Bestimmung der Einspanngrade wird ein nichtlinearer Modellierungsansatz eingef{\"u}hrt, mit dem die Interaktion von W{\"a}nden und Decken abgebildet werden kann. Die Anwendung des Konzepts mit erh{\"o}hten geb{\"a}udespezifischen Verhaltensbeiwerten wird am Beispiel eines Mehrfamilienhauses aus Kalksandsteinen demonstriert. Die Ergebnisse der linearen Nachweise mit erh{\"o}hten Verhaltensbeiwerten f{\"u}r dieses Geb{\"a}ude liegen deutlich n{\"a}her an den Ergebnissen nichtlinearer Nachweise und somit bleiben {\"u}bliche Grundrisse in Erdbebengebieten mit den traditionellen linearen Rechenans{\"a}tzen nachweisbar.}, language = {de} } @article{ElDeibButenwegKlinkel2021, author = {El-Deib, Khaled and Butenweg, Christoph and Klinkel, Sven}, title = {Erdbebennachweis von Mauerwerksbauten mit realistischen Modellen und erh{\"o}hten Verhaltensbeiwerten}, series = {Mauerwerk}, volume = {2021}, journal = {Mauerwerk}, number = {3}, editor = {Jesse, Dirk}, publisher = {Wiley}, address = {Weinheim}, issn = {1437-1022}, doi = {10.1002/dama.202110014}, pages = {110 -- 119}, year = {2021}, abstract = {Die Anwendung des linearen Nachweiskonzepts auf Mauerwerksbauten f{\"u}hrt dazu, dass bereits heute Standsicherheitsnachweise f{\"u}r Geb{\"a}ude mit {\"u}blichen Grundrissen in Gebieten mit moderaten Erdbebeneinwirkungen nicht mehr gef{\"u}hrt werden k{\"o}nnen. Diese Problematik wird sich in Deutschland mit der Einf{\"u}hrung kontinuierlicher probabilistischer Erdbebenkarten weiter versch{\"a}rfen. Aufgrund der Erh{\"o}hung der seismischen Einwirkungen, die sich vielerorts ergibt, ist es erforderlich, die vorhandenen, bislang nicht ber{\"u}cksichtigten Tragf{\"a}higkeitsreserven in nachvollziehbaren Nachweiskonzepten in der Baupraxis verf{\"u}gbar zu machen. Der vorliegende Beitrag stellt ein Konzept f{\"u}r die geb{\"a}udespezifische Ermittlung von erh{\"o}hten Verhaltensbeiwerten vor. Die Verhaltensbeiwerte setzen sich aus drei Anteilen zusammen, mit denen die Lastumverteilung im Grundriss, die Verformungsf{\"a}higkeit und Energiedissipation sowie die {\"U}berfestigkeiten ber{\"u}cksichtigt werden. F{\"u}r die rechnerische Ermittlung dieser drei Anteile wird ein nichtlineares Nachweiskonzept auf Grundlage von Pushover-Analysen vorgeschlagen, in denen die Interaktionen von W{\"a}nden und Geschossdecken durch einen Einspanngrad beschrieben werden. F{\"u}r die Bestimmung der Einspanngrade wird ein nichtlinearer Modellierungsansatz eingef{\"u}hrt, mit dem die Interaktion von W{\"a}nden und Decken abgebildet werden kann. Die Anwendung des Konzepts mit erh{\"o}hten geb{\"a}udespezifischen Verhaltensbeiwerten wird am Beispiel eines Mehrfamilienhauses aus Kalksandsteinen demonstriert. Die Ergebnisse der linearen Nachweise mit erh{\"o}hten Verhaltensbeiwerten f{\"u}r dieses Geb{\"a}ude liegen deutlich n{\"a}her an den Ergebnissen nichtlinearer Nachweise und somit bleiben {\"u}bliche Grundrisse in Erdbebengebieten mit den traditionellen linearen Rechenans{\"a}tzen nachweisbar.}, language = {de} } @inproceedings{ElMoussaouiKassmiAlexopoulosetal.2021, author = {El Moussaoui, Noureddine and Kassmi, Khalil and Alexopoulos, Spiros and Schwarzer, Klemens and Chayeb, Hamid and Bachiri, Najib}, title = {Simulation studies on a new innovative design of a hybrid solar distiller MSDH alimented with a thermal and photovoltaic energy}, series = {Materialstoday: Proceedings}, volume = {45}, booktitle = {Materialstoday: Proceedings}, number = {8}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2214-7853}, doi = {10.1016/j.matpr.2021.03.115}, pages = {7653 -- 7660}, year = {2021}, abstract = {In this paper, we present the structure, the simulation the operation of a multi-stage, hybrid solar desalination system (MSDH), powered by thermal and photovoltaic (PV) (MSDH) energy. The MSDH system consists of a lower basin, eight horizontal stages, a field of four flat thermal collectors with a total area of 8.4 m2, 3 Kw PV panels and solar batteries. During the day the system is heated by thermal energy, and at night by heating resistors, powered by solar batteries. These batteries are charged by the photovoltaic panels during the day. More specifically, during the day and at night, we analyse the temperature of the stages and the production of distilled water according to the solar irradiation intensity and the electric heating power, supplied by the solar batteries. The simulations were carried out in the meteorological conditions of the winter month (February 2020), presenting intensities of irradiance and ambient temperature reaching 824 W/m2 and 23 °C respectively. The results obtained show that during the day the system is heated by the thermal collectors, the temperature of the stages and the quantity of water produced reach 80 °C and 30 Kg respectively. At night, from 6p.m. the system is heated by the electric energy stored in the batteries, the temperature of the stages and the quantity of water produced reach respectively 90 °C and 104 Kg for an electric heating power of 2 Kw. Moreover, when the electric power varies from 1 Kw to 3 Kw the quantity of water produced varies from 92 Kg to 134 Kg. The analysis of these results and their comparison with conventional solar thermal desalination systems shows a clear improvement both in the heating of the stages, by 10\%, and in the quantity of water produced by a factor of 3.}, language = {en} } @inproceedings{EdipGarevskiButenwegetal.2014, author = {Edip, Kemal and Garevski, Mihail and Butenweg, Christoph and Sheshov, Vlatko and Bojadjieva, Julijana and Gjorgjiev, Igor}, title = {New coupled finite-infinite element approach for wave propagation simulation of unbounded soil media}, series = {2nd European Conference on Earthquake Engineering and Seismology 2014 (2nd ECEES) : joint event of the 15th European Conference on Earthquake Engineering and the 34th General Assembly of the European Seismological Commission : Istanbul, Turkey, 25-29 August 2014 / European Association for Earthquake Engineering (EAEE) ; Vol. 2}, booktitle = {2nd European Conference on Earthquake Engineering and Seismology 2014 (2nd ECEES) : joint event of the 15th European Conference on Earthquake Engineering and the 34th General Assembly of the European Seismological Commission : Istanbul, Turkey, 25-29 August 2014 / European Association for Earthquake Engineering (EAEE) ; Vol. 2}, publisher = {Curran Associates, Inc.}, address = {Red Hook, NY}, organization = {European Conference on Earthquake Engineering and Seismology <2, 2014, Istanbul>}, isbn = {978-1-5108-1021-1}, pages = {1556 -- 1561}, year = {2014}, language = {en} } @article{EdipGarevskiButenwegetal.2013, author = {Edip, Kemal and Garevski, Mihail and Butenweg, Christoph and Sesov, Vlatko and Cvetanovska, Julijana and Gjorgiev, Igor}, title = {Numerical simulation of geotechnical problems by coupled finite and infinite elements}, series = {Journal of civil engineering and architecture}, volume = {7}, journal = {Journal of civil engineering and architecture}, number = {1}, publisher = {David Publishing}, address = {Libertyville}, issn = {1934-7359 (E-Journal)}, pages = {68 -- 77}, year = {2013}, language = {en} } @inproceedings{EdipGarevskiButenwegetal.2014, author = {Edip, Kemal and Garevski, Mihail and Butenweg, Christoph and Sesov, Vlatko and Bojadjieva, Julijana and Gjorgjiev, Igor}, title = {Boundary effects on seismic analysis of multi-storey frames considering soil structure interaction phenomenon}, series = {Seismic design of industrial facilities : proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF-Conference) ; [Aachen, 26. - 27. September 2013] / Chair of Structural Statics and Dynamics, RWTH Aachen. Sven Klinkel ..., ed}, booktitle = {Seismic design of industrial facilities : proceedings of the International Conference on Seismic Design of Industrial Facilities (SeDIF-Conference) ; [Aachen, 26. - 27. September 2013] / Chair of Structural Statics and Dynamics, RWTH Aachen. Sven Klinkel ..., ed}, publisher = {Springer Vieweg}, address = {Wiesbaden}, organization = {International Conference on Seismic Design of Industrial Facilities <2013, Aachen>}, isbn = {978-3-658-02809-1 (Print) ; 978-3-658-02810-7}, doi = {10.1007/978-3-658-02810-7_47}, pages = {569 -- 576}, year = {2014}, language = {en} } @article{EdipSesovButenwegetal.2018, author = {Edip, K. and Sesov, V. and Butenweg, Christoph and Bojadjieva, J.}, title = {Development of coupled numerical model for simulation of multiphase soil}, series = {Computers and Geotechnics}, volume = {96}, journal = {Computers and Geotechnics}, publisher = {Elsevier}, address = {Amsterdam}, issn = {0266-352X}, doi = {10.1016/j.compgeo.2017.08.016}, pages = {118 -- 131}, year = {2018}, abstract = {In this paper, a coupled multiphase model considering both non-linearities of water retention curves and solid state modeling is proposed. The solid displacements and the pressures of both water and air phases are unknowns of the proposed model. The finite element method is used to solve the governing differential equations. The proposed method is demonstrated through simulation of seepage test and partially consolidation problem. Then, implementation of the model is done by using hypoplasticity for the solid phase and analyzing the fully saturated triaxial experiments. In integration of the constitutive law error controlling is improved and comparisons done accordingly. In this work, the advantages and limitations of the numerical model are discussed.}, language = {en} } @inproceedings{DuemmlerOetringerGoettsche2020, author = {D{\"u}mmler, Andreas and Oetringer, Kerstin and G{\"o}ttsche, Joachim}, title = {Auslegungstool zur energieeffizienten K{\"u}hlung von Geb{\"a}uden}, series = {DKV-Tagung 2020, AA IV}, booktitle = {DKV-Tagung 2020, AA IV}, pages = {1109}, year = {2020}, abstract = {Thematisch widmet sich das Projekt Coolplan- AIR der Fortentwicklung und Feldvalidierung eines Berechnungs- und Auslegungstools zur energieeffizienten K{\"u}hlung von Geb{\"a}uden mit luftgest{\"u}tzten Systemen. Neben dem Aufbau und der Weiterentwicklung von Simulationsmodellen erfolgen Vermessungen der Gesamtsysteme anhand von Praxisanlagen im Feld. Der Schwerpunkt des Projekts liegt auf der Vermessung, Simulation und Integration rein luftgest{\"u}tzter K{\"u}hltechnologien. Im Bereich der K{\"a}lteerzeugung wurden Luft- Luft- W{\"a}rmepumpen, Anlagen zur adiabaten K{\"u}hlung bzw. offene K{\"u}hlt{\"u}rme und VRF- Multisplit- Systeme (Variable Refrigerant Flow) im Feld bzw. auf dem Teststand der HSD vermessen. Die Komponentenmodelle werden in die Matlab/Simulink- Toolbox CARNOT integriert und anschließend auf Basis der zuvor erhaltenen Messdaten validiert. Einerseits erlauben die Messungen das Betriebsverhalten von Anlagenkomponenten zu analysieren. Andererseits soll mit der Vermessung im Feld gepr{\"u}ft werden, inwieweit die Simulationsmodelle, welche im Vorg{\"a}ngerprojekt aus Pr{\"u}fstandmessungen entwickelt wurden, auch f{\"u}r gr{\"o}ßere Ger{\"a}teleistungen G{\"u}ltigkeit besitzen. Die entwickelten und implementierten Systeme, bestehend aus verschiedensten Anlagenmodellen und Regelungskomponenten, werden gepr{\"u}ft und dahingehend qualifiziert, dass sie in Standard- Auslegungstools zuverl{\"a}ssig verwendet werden k{\"o}nnen. Zus{\"a}tzlich wird ein energetisches Monitoring eines H{\"o}rsaalgeb{\"a}udes am Campus J{\"u}lich durchgef{\"u}hrt, das u. a. zur Validierung der K{\"u}hllastberechnungen in g{\"a}ngigen Simulationsmodelle genutzt werden kann.}, language = {de} } @inproceedings{DoerenWernicke1983, author = {D{\"o}ren, Horst-Peter and Wernicke, K.}, title = {Auftragen von verschleißfesten stranggegossenen Hartlegierungen auf Kobaltbasis durch das WIG- und Gasschweißen}, series = {Schweißen und Schneiden '83 = Welding and Cutting '83. Vortr{\"a}ge der Großen Schweißtechnischen Tagung in Aachen vom 28. bis 30. September 1983. Veranst.: Deutscher Verband f{\"u}r Schweißtechnik (DVS). DVS-Berichte. 83}, booktitle = {Schweißen und Schneiden '83 = Welding and Cutting '83. Vortr{\"a}ge der Großen Schweißtechnischen Tagung in Aachen vom 28. bis 30. September 1983. Veranst.: Deutscher Verband f{\"u}r Schweißtechnik (DVS). DVS-Berichte. 83}, publisher = {Dt. Verl. f{\"u}r Schweißtechnik}, address = {D{\"u}sseldorf}, issn = {3-87155-388-3}, pages = {109 -- 113}, year = {1983}, language = {de} } @article{DoerenWernicke1987, author = {D{\"o}ren, Horst-Peter and Wernicke, K.}, title = {Slijtvaste lagen door oplassen met plasmapoeder}, series = {Metaal en Kunststof: MK. Universeel weekblad voor fabriek en werkplaats. 24 (1987), Nr. 23}, journal = {Metaal en Kunststof: MK. Universeel weekblad voor fabriek en werkplaats. 24 (1987), Nr. 23}, issn = {0026-0460}, pages = {76 -- 79}, year = {1987}, language = {nl} } @incollection{DoerenWernicke1985, author = {D{\"o}ren, Horst-Peter and Wernicke, K.}, title = {Einfluß der Schweißparameter beim Plasmaauftragschweißen mit Pulvern}, series = {Schweißen und Schneiden '85 = Welding and Cutting '85. Vortr{\"a}ge der Großen Schweißtechnischen Tagung in Essen vom 11. bis 13. September 1985. Veranst.: Deutscher Verband f{\"u}r Schweißtechnik (DVS). DVS-Berichte. 100}, booktitle = {Schweißen und Schneiden '85 = Welding and Cutting '85. Vortr{\"a}ge der Großen Schweißtechnischen Tagung in Essen vom 11. bis 13. September 1985. Veranst.: Deutscher Verband f{\"u}r Schweißtechnik (DVS). DVS-Berichte. 100}, publisher = {Dt. Verl. f{\"u}r Schweißtechnik (DVS)}, address = {D{\"u}sseldorf}, isbn = {3-87155-405-7}, pages = {72 -- 76}, year = {1985}, language = {de} } @incollection{DoerenPlaschkaPohl1987, author = {D{\"o}ren, Horst-Peter and Plaschka, K. and Pohl, M.}, title = {Die Untersuchung von Schutzgasschweißdr{\"a}hten mit Hilfe des Rasterelektronenmikroskops}, series = {Fortschritte in der Metallographie. Berichte der 7. Internationalen Metallographie-Tagung Leoben 15. bis 17. Oktober 1986. Sonderb{\"a}nde der Praktischen Metallographie. 18}, booktitle = {Fortschritte in der Metallographie. Berichte der 7. Internationalen Metallographie-Tagung Leoben 15. bis 17. Oktober 1986. Sonderb{\"a}nde der Praktischen Metallographie. 18}, publisher = {Riederer}, address = {Stuttgart}, issn = {0343-3579}, pages = {333 -- 345}, year = {1987}, language = {de} } @inproceedings{DoerenMolitorErtl1996, author = {D{\"o}ren, Horst-Peter and Molitor, M. and Ertl, Karl-Heinz}, title = {Problematik der H{\"a}rtemessung an pulverflammgespritzten Verschleißschutzschichten mit Hilfe mobiler, dynamischer H{\"a}rtepr{\"u}fverfahren}, series = {Thermische Spritzkonferenz : TS 96 ; Vortr{\"a}ge und Posterbeitr{\"a}ge. Essen 6. bis 8. M{\"a}rz 1996. DVS-Berichte. Bd. 175}, booktitle = {Thermische Spritzkonferenz : TS 96 ; Vortr{\"a}ge und Posterbeitr{\"a}ge. Essen 6. bis 8. M{\"a}rz 1996. DVS-Berichte. Bd. 175}, editor = {Lugscheider, Erich}, publisher = {DVS-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-87155-480-4}, pages = {249 -- 254}, year = {1996}, language = {de} } @inproceedings{DoerenLohrmannWernicke1986, author = {D{\"o}ren, Horst-Peter and Lohrmann, G. R. and Wernicke, K.}, title = {Plasma-Auftragschweißen mit Metallpulvern und Einsatzm{\"o}glichkeiten in der Kerntechnik}, series = {Schweissen in der Kerntechnik : Vortr{\"a}ge : internationales Kolloquium. 5 = Welding in nuclear engineering: international conference. 5 = Le soudage dans la technique nucleaire: colloque international. 5 : N{\"u}rnberg, 26.11.86-28.11.86. DVS-Berichte. Bd. 106}, booktitle = {Schweissen in der Kerntechnik : Vortr{\"a}ge : internationales Kolloquium. 5 = Welding in nuclear engineering: international conference. 5 = Le soudage dans la technique nucleaire: colloque international. 5 : N{\"u}rnberg, 26.11.86-28.11.86. DVS-Berichte. Bd. 106}, publisher = {Dt. Verl. f{\"u}r Schweißtechnik}, address = {D{\"u}sseldorf}, isbn = {3-87155-411-1}, pages = {129 -- 133}, year = {1986}, language = {de} } @inproceedings{DoerenKroeschel1991, author = {D{\"o}ren, Horst-Peter and Kr{\"o}schel, R.}, title = {Plasma-Spritzen}, series = {Schweisszusatzwerkstoffe : Fortschritte, Erfahrungen, Tendenzen. 2. Aachener Schweisstechnik-Kolloquium, 7. bis 8. M{\"a}rz 1991}, booktitle = {Schweisszusatzwerkstoffe : Fortschritte, Erfahrungen, Tendenzen. 2. Aachener Schweisstechnik-Kolloquium, 7. bis 8. M{\"a}rz 1991}, editor = {Dilthey, Ulrich}, publisher = {VDI-Verl.}, address = {D{\"u}sseldorf}, isbn = {3-18-140802-6}, pages = {147 -- 167}, year = {1991}, language = {de} } @incollection{Doeren1998, author = {D{\"o}ren, Horst-Peter}, title = {Aktuelle Fragen zur Schweißmetallurgie. Neue Werkstoffe und ihre schweißtechnische Verarbeitung = Current questions on welding metallurgy}, series = {Jahrbuch Schweißtechnik '99}, booktitle = {Jahrbuch Schweißtechnik '99}, publisher = {DVS-Verlag}, address = {D{\"u}sseldorf}, isbn = {3-87155-745-5}, pages = {77 -- 85}, year = {1998}, language = {de} } @inproceedings{Doeren1988, author = {D{\"o}ren, Horst-Peter}, title = {The examination of surfaces of cold rolled wire for gas-shielded arc-welding}, series = {WAI/BISPA joint conference : proceedings. Joint conference of Wire Association International and the British Independent Steel Producers Association (WAI/BISPA) : 26 - 27. 09. 1988, Stratford-upon-Avon}, booktitle = {WAI/BISPA joint conference : proceedings. Joint conference of Wire Association International and the British Independent Steel Producers Association (WAI/BISPA) : 26 - 27. 09. 1988, Stratford-upon-Avon}, address = {Guilford, Conn.}, organization = {Wire Association International}, pages = {102 -- 112}, year = {1988}, language = {en} } @incollection{Doeren2008, author = {D{\"o}ren, Horst-Peter}, title = {Schweißtechnische Verarbeitung nichtrostender St{\"a}hle}, series = {Rostfreie St{\"a}hle. Grundwissen, Konstruktions- und Verarbeitungshinweise}, booktitle = {Rostfreie St{\"a}hle. Grundwissen, Konstruktions- und Verarbeitungshinweise}, editor = {G{\"u}mpel, Paul}, publisher = {Expert Verlag}, address = {Renningen}, isbn = {978-3-8169-2689-4}, pages = {140 -- 174}, year = {2008}, language = {de} } @incollection{Doeren1987, author = {D{\"o}ren, Horst-Peter}, title = {Nichtrostende St{\"a}hle}, series = {Jahrbuch Schweißtechnik. 1988}, booktitle = {Jahrbuch Schweißtechnik. 1988}, publisher = {Dt. Verl. f{\"u}r Schweißtechnik (DVS)}, address = {D{\"u}sseldorf}, isbn = {0935-0292}, pages = {188 -- 203}, year = {1987}, language = {de} } @article{Doeren1987, author = {D{\"o}ren, Horst-Peter}, title = {Pulver-Auftragschweissen / Hoher Automatisierungsgrad des Plasmaverfahrens. Harte Panzerung aus dem Argon-Strahl.}, series = {Handelsblatt. Nr. 212 vom 4.11.1987}, journal = {Handelsblatt. Nr. 212 vom 4.11.1987}, pages = {b15}, year = {1987}, language = {de} } @incollection{Doeren1990, author = {D{\"o}ren, Horst-Peter}, title = {Das Schweißen von Austenit-Ferrit-Verbindungen}, series = {Jahrbuch Schweißtechnik. 1991}, booktitle = {Jahrbuch Schweißtechnik. 1991}, publisher = {DVS-Verlag}, address = {D{\"u}sseldorf}, isbn = {3-87155-725-0}, pages = {57 -- 63}, year = {1990}, language = {de} } @book{Doeren2004, author = {D{\"o}ren, Horst-Peter}, title = {F{\"u}getechnik, Schweißtechnik / Horst-Peter D{\"o}ren (Hrsg.).- 6. Aufl.}, publisher = {DVS Verl.}, address = {D{\"u}sseldorf}, isbn = {3-87155-786-2}, pages = {392 S.}, year = {2004}, language = {de} } @book{Doeren2007, author = {D{\"o}ren, Horst-Peter}, title = {F{\"u}getechnik, Schweißtechnik / Horst-Peter D{\"o}ren (Hrsg.).- 7., aktualis. Aufl.}, publisher = {DVS Verl.}, address = {D{\"u}sseldorf}, isbn = {978-3-87155-907-5}, pages = {392 S.}, year = {2007}, language = {de} } @book{Doeren1977, author = {D{\"o}ren, Horst-Peter}, title = {Anwendung von AlN- bzw. AlN-Al2O3-Mischungen als Festelektrolyt in Eisenschmelzen bei 1640° C}, address = {Aachen}, pages = {52 S., 33 Bl. : Ill.}, year = {1977}, language = {de} } @book{Doeren2012, author = {D{\"o}ren, Horst-Peter}, title = {F{\"u}getechnik, Schweißtechnik. Horst-Peter D{\"o}ren (Hrsg.).- 8., aktualis. und erw. Aufl.}, publisher = {DVS Media}, address = {D{\"u}sseldorf}, isbn = {978-3-87155-999-0}, pages = {411 S.: Ill., graph. Darst.}, year = {2012}, language = {de} } @inproceedings{DuranParedesMottaghyHerrmannetal.2020, author = {Duran Paredes, Ludwin and Mottaghy, Darius and Herrmann, Ulf and Groß, Rolf Fritz}, title = {Online ground temperature and soil moisture monitoring of a shallow geothermal system with non-conventional components}, series = {EGU General Assembly 2020}, booktitle = {EGU General Assembly 2020}, year = {2020}, abstract = {We present first results from a newly developed monitoring station for a closed loop geothermal heat pump test installation at our campus, consisting of helix coils and plate heat exchangers, as well as an ice-store system. There are more than 40 temperature sensors and several soil moisture content sensors distributed around the system, allowing a detailed monitoring under different operating conditions.In the view of the modern development of renewable energies along with the newly concepts known as Internet of Things and Industry 4.0 (high-tech strategy from the German government), we created a user-friendly web application, which will connect the things (sensors) with the open network (www). Besides other advantages, this allows a continuous remote monitoring of the data from the numerous sensors at an arbitrary sampling rate.Based on the recorded data, we will also present first results from numerical simulations, taking into account all relevant heat transport processes.The aim is to improve the understanding of these processes and their influence on the thermal behavior of shallow geothermal systems in the unsaturated zone. This will in turn facilitate the prediction of the performance of these systems and therefore yield an improvement in their dimensioning when designing a specific shallow geothermal installation.}, language = {en} }