@article{KrauseNeubertPietsch1991, author = {Krause, Gregor and Neubert, R. and Pietsch, R.}, title = {Elektrische Eigenschaften von Kunststoffen}, publisher = {RWTH}, address = {Aachen}, year = {1991}, language = {de} } @article{KrauseMoellerMeurer1989, author = {Krause, Gregor and M{\"o}ller, K. and Meurer, D.}, title = {Dielectric phenomena in semicrystalline polymers}, series = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 2}, journal = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 2}, pages = {215 -- 222}, year = {1989}, language = {en} } @article{KrauseMeurerKlee1988, author = {Krause, Gregor and Meurer, D. and Klee, D.}, title = {Space Charge Formation Related to the Morphology of Polymers}, series = {ISE 6 : 6th International symposium on electrets : Papers}, journal = {ISE 6 : 6th International symposium on electrets : Papers}, publisher = {IEEE}, address = {Piscataway, NY}, pages = {XIX, 688 S. : graph. Darst.}, year = {1988}, language = {en} } @article{KrauseMeurerKlee1989, author = {Krause, Gregor and Meurer, D. and Klee, D.}, title = {Space charge formation related to the morphology of polymers}, series = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3}, journal = {IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3}, pages = {215 -- 222}, year = {1989}, language = {en} } @article{KrauseKehle1993, author = {Krause, Gregor and Kehle, Uwe}, title = {Unterst{\"u}tzung des Motorhochlaufs eines Pumpspeicherkraftwerks durch Mittel der Blindleistungskompensation / Uwe Kehle, Gregor Krause}, series = {Ert{\"u}chtigung von Kraftwerken und Netzen, insbesondere in den neuen Bundesl{\"a}ndern. Energietechnische Gesellschaft am 20. und 21. Oktober 1993 in Mannheim}, journal = {Ert{\"u}chtigung von Kraftwerken und Netzen, insbesondere in den neuen Bundesl{\"a}ndern. Energietechnische Gesellschaft am 20. und 21. Oktober 1993 in Mannheim}, publisher = {VDE-Verl.}, address = {Berlin [u.a.]}, isbn = {3-8007-1967-3}, pages = {287 -- 296}, year = {1993}, language = {de} } @article{KrauseGoettlichMoelleretal.1992, author = {Krause, Gregor and G{\"o}ttlich, S. and M{\"o}ller, K. and Neubert, R.}, title = {Dielektrisches Alterungsmodell hochpolymerer Isolierstoffe / S. G{\"o}ttlich, G. Krause, K. M{\"o}ller, R. Neubert, R. Pietsch}, series = {Isoliersysteme der elektrischen Energietechnik. Lebensdauer, Diagnostik und Entwicklungstendenzen ; Vortr{\"a}ge der ETG-Fachtagung am 26. und 27. Mai 1992 in W{\"u}rzburg}, journal = {Isoliersysteme der elektrischen Energietechnik. Lebensdauer, Diagnostik und Entwicklungstendenzen ; Vortr{\"a}ge der ETG-Fachtagung am 26. und 27. Mai 1992 in W{\"u}rzburg}, publisher = {vde-Verl.}, address = {Berlin [u.a.]}, isbn = {3-8007-1828-6}, pages = {49 -- 54}, year = {1992}, language = {de} } @article{KrauseGoettlichMoelleretal.1989, author = {Krause, Gregor and G{\"o}ttlich, S. and M{\"o}ller, K. and Meurer, D.}, title = {Space Charge Phenomena in Partially Crystalline Polymers: On-Line Measurement of Charge Carrier Motion under High AC-Field Strength / G. Krause, S. G{\"o}ttlich, K. M{\"o}ller, D. Meurer}, series = {Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989}, journal = {Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989}, publisher = {IEEE}, address = {Piscataway, N.J.}, pages = {IX, 607 S.}, year = {1989}, language = {en} } @article{KrauseFruthKrauseetal.1988, author = {Krause, Gregor and Fruth, Bernhard and Krause, Gregor and Meurer, D.}, title = {Einfluß der Verarbeitungsverfahren und verarbeitungsbedingter Werkstoffzus{\"a}tze auf die dielektrischen Eigenschaften von Kunststoffen / B. Fruth, G. Krause, D. Meurer, K. M{\"o}ller}, address = {Aachen}, year = {1988}, language = {de} } @article{KrauseFruth1987, author = {Krause, Gregor and Fruth, Bernhard}, title = {Dielectric Properties of Polyolefins Stressed by High Electrical Fields. Fruth, B. ; Krause, G.}, year = {1987}, language = {en} } @article{KrauseFruth1988, author = {Krause, Gregor and Fruth, B.}, title = {Dielectric Properties of Polyolefins Stressed by High Electrical Fields / Fruth, B. ; Krause, G.}, series = {Plenary lectures and contributions presented at the International Symposium on Polymer Materials : held in San Sebastian (Donostia), Spain, 31 August - 4 September, 1987 / symposium ed. G. M. Guzm{\´a}n ; A. Santamaria}, journal = {Plenary lectures and contributions presented at the International Symposium on Polymer Materials : held in San Sebastian (Donostia), Spain, 31 August - 4 September, 1987 / symposium ed. G. M. Guzm{\´a}n ; A. Santamaria}, publisher = {Huethig \& Wepf}, address = {Basel}, isbn = {3-85739-220-7}, pages = {XIV, 629 S.}, year = {1988}, language = {en} } @article{KrauseForsythPeter1993, author = {Krause, Gregor and Forsyth, Paul A. and Peter, Till}, title = {Robuste Filter in der Energieversorgung / Paul A. Forsyth, Gregor Krause, Till Peter}, series = {ETZ. 114 (1993), H. 22}, journal = {ETZ. 114 (1993), H. 22}, pages = {1382 -- 1385}, year = {1993}, language = {de} } @article{Krause2001, author = {Krause, Gregor}, title = {Verhandeln statt Energiesparen? {\"U}ber den Umgang mit Preisnachl{\"a}ssen im Energiebereich}, series = {extrACT: Das Magazin der Fachhochschule Aachen (2001)}, journal = {extrACT: Das Magazin der Fachhochschule Aachen (2001)}, pages = {22 -- 23}, year = {2001}, language = {de} } @article{Krause1991, author = {Krause, Gregor}, title = {High Field Phenomena of Polymeric Insulation Investigated at PE Needle-Plane Specimen}, series = {Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30, 1991 / Technische Universit{\"a}t Dresden}, journal = {Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30, 1991 / Technische Universit{\"a}t Dresden}, publisher = {TU Dresden}, address = {Dresden}, year = {1991}, language = {en} } @book{Krause1991, author = {Krause, Gregor}, title = {Leitungsmechanismen und Raumladungsph{\"a}nomene in Polyolefinen bei Hochfeldbeanspruchung}, publisher = {Verl. d. Augustinus-Buchh.}, address = {Aachen}, isbn = {3-925038-97-3}, pages = {137 S. : graph. Darst.}, year = {1991}, language = {de} } @incollection{Krause2001, author = {Krause, Gregor}, title = {Brenchmarking elektrischer Energie in Zweckbauten - Aussagef{\"a}higkeit von Energiekennzahlen}, series = {Betriebliches Energiemanagement : Tagung Cottbus, 6. und 7. M{\"a}rz 2001. (VDI-Berichte ; 1593)}, booktitle = {Betriebliches Energiemanagement : Tagung Cottbus, 6. und 7. M{\"a}rz 2001. (VDI-Berichte ; 1593)}, publisher = {VDI-Verlag}, address = {D{\"u}sseldorf}, isbn = {3180915935}, pages = {413 -- 422}, year = {2001}, language = {de} } @inproceedings{Krause2002, author = {Krause, Gregor}, title = {Energiemanagement in Geb{\"a}uden}, series = {Energiemanagement in Geb{\"a}uden : 24. April 2002 : Tagung und Ausstellung}, booktitle = {Energiemanagement in Geb{\"a}uden : 24. April 2002 : Tagung und Ausstellung}, publisher = {Fachhochschule Aachen}, address = {Aachen}, pages = {1 -- 10}, year = {2002}, language = {de} } @article{KraffWredeSchoembergetal.2013, author = {Kraff, Oliver and Wrede, Karsten H. and Schoemberg, Tobias and Dammann, Philipp and Noureddine, Yacine and Orzada, Stephan and Ladd, Mark E. and Bitz, Andreas}, title = {MR safety assessment of potential RF heating from cranial fixation plates at 7 T}, series = {Medical Physics}, volume = {40}, journal = {Medical Physics}, number = {4}, publisher = {Wiley}, address = {Hoboken}, issn = {2473-4209}, doi = {10.1118/1.4795347}, pages = {042302-1 -- 042302-10}, year = {2013}, language = {en} } @article{KraffBitzKruszonaetal.2009, author = {Kraff, Oliver and Bitz, Andreas and Kruszona, Stefan and Orzada, Stephan and Schaefer, Lena C. and Theysohn, Jens M. and Maderwald, Stefan and Ladd, Mark E. and Quick, Harald H.}, title = {An eight-channel phased array RF coil for spine MR imaging at 7 T}, series = {Investigative Radiology}, volume = {44}, journal = {Investigative Radiology}, number = {11}, publisher = {Lippincott Williams \& Wilkins}, issn = {1536-0210}, doi = {10.1097/RLI.0b013e3181b24ab7}, pages = {734 -- 740}, year = {2009}, language = {en} } @article{KraffBitzDammannetal.2010, author = {Kraff, Oliver and Bitz, Andreas and Dammann, Philipp and Ladd, Susanne C. and Ladd, Mark E. and Quick, Harald H.}, title = {An eight-channel transmit/receive multipurpose coil for musculoskeletal MR imaging at 7 T}, series = {Medical Physics}, volume = {37}, journal = {Medical Physics}, number = {12}, publisher = {Wiley}, address = {Hoboken, NJ}, issn = {2473-4209}, doi = {10.1118/1.3517176}, pages = {6368 -- 6376}, year = {2010}, abstract = {Purpose: MRI plays a leading diagnostic role in assessing the musculoskeletal (MSK) system and is well established for most questions at clinically used field strengths (up to 3 T). However, there are still limitations in imaging early stages of cartilage degeneration, very fine tendons and ligaments, or in locating nerve lesions, for example. 7 T MRI of the knee has already received increasing attention in the current published literature, but there is a strong need to develop new radiofrequency (RF) coils to assess more regions of the MSK system. In this work, an eight-channel transmit/receive RF array was built as a multipurpose coil for imaging some of the thus far neglected regions. An extensive coil characterization protocol and first in vivo results of the human wrist, shoulder, elbow, knee, and ankle imaged at 7 T will be presented. Methods: Eight surface loop coils with a dimension ofurn:x-wiley:00942405:media:mp7176:mp7176-math-0001 were machined from FR4 circuit board material. To facilitate easy positioning, two coil clusters, each with four loop elements, were combined to one RF transmit/receive array. An overlapped and shifted arrangement of the coil elements was chosen to reduce the mutual inductance between neighboring coils. A phantom made of body-simulating liquid was used for tuning and matching on the bench. Afterward, the S-parameters were verified on a human wrist, elbow, and shoulder. For safety validation, a detailed compliance test was performed including full wave simulations of the RF field distribution and the corresponding specific absorption rate (SAR) for all joints. In vivo images of four volunteers were assessed with gradient echo and spin echo sequences modified to obtain optimal image contrast, full anatomic coverage, and the highest spatial resolution within a reasonable acquisition time. The performance of the RF coil was additionally evaluated by in vivo B1 mapping. Results: A comparison of B1 per unit power, flip angle distribution, and anatomic images showed a fairly homogeneous excitation for the smaller joints (elbow, wrist, and ankle), while for the larger joints, the shoulder and especially the knee, B1 inhomogeneities and limited penetration depth were more pronounced. However, the greater part of the shoulder joint could be imaged.In vivo images rendered very fine anatomic details such as fascicles of the median nerve and the branching of the nerve bundles. High-resolution images of cartilage, labrum, and tendons could be acquired. Additionally, turbo spin echo (TSE) and inversion recovery sequences performed very well. Conclusions: This study demonstrates that the concept of two four-channel transmit/receive RF arrays can be used as a multipurpose coil for high-resolutionin vivo MR imaging of the musculoskeletal system at 7 T. Not only gradient echo but also typical clinical and SAR-intensive sequences such as STIR and TSE performed well. Imaging of small structures and peripheral nerves could in particular benefit from this technique.}, language = {en} } @article{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{KowalewskiBragardHueningetal.2023, author = {Kowalewski, Paul and Bragard, Michael and H{\"u}ning, Felix and De Doncker, Rik W.}, title = {An inexpensive Wiegand-sensor-based rotary encoder without rotating magnets for use in electrical drives}, series = {IEEE Transactions on Instrumentation and Measurement}, journal = {IEEE Transactions on Instrumentation and Measurement}, publisher = {IEEE}, issn = {0018-9456 (Print)}, doi = {10.1109/TIM.2023.3326166}, pages = {10 Seiten}, year = {2023}, abstract = {This paper introduces an inexpensive Wiegand-sensor-based rotary encoder that avoids rotating magnets and is suitable for electrical-drive applications. So far, Wiegand-sensor-based encoders usually include a magnetic pole wheel with rotating permanent magnets. These encoders combine the disadvantages of an increased magnet demand and a limited maximal speed due to the centripetal force acting on the rotating magnets. The proposed approach reduces the total demand of permanent magnets drastically. Moreover, the rotating part is manufacturable from a single piece of steel, which makes it very robust and cheap. This work presents the theoretical operating principle of the proposed approach and validates its benefits on a hardware prototype. The presented proof-of-concept prototype achieves a mechanical resolution of 4.5 ° by using only 4 permanent magnets, 2Wiegand sensors and a rotating steel gear wheel with 20 teeth.}, language = {en} } @article{KobusBitzUdenetal.2012, author = {Kobus, Thiele and Bitz, Andreas and Uden, Mark J. van and Lagemaat, Miram W. and Rothgang, Eva and Orzada, Stephan and Heerschap, Arend and Scheenen, Tom W. J.}, title = {In vivo 31P MR spectroscopic imaging of the human prostate at 7 T: safety and feasibility}, series = {Magnetic Resonance in Medicine}, volume = {68}, journal = {Magnetic Resonance in Medicine}, number = {6}, publisher = {Wiley-Liss}, address = {New York}, issn = {1522-2594}, doi = {10.1002/mrm.24175}, pages = {1683 -- 1695}, year = {2012}, abstract = {31P MR spectroscopic imaging of the human prostate provides information about phosphorylated metabolites that could be used for prostate cancer characterization. The sensitivity of a magnetic field strength of 7 T might enable 3D 31P MR spectroscopic imaging with relevant spatial resolution in a clinically acceptable measurement time. To this end, a 31P endorectal coil was developed and combined with an eight-channel 1H body-array coil to relate metabolic information to anatomical location. An extensive safety validation was performed to evaluate the specific absorption rate, the radiofrequency field distribution, and the temperature distribution of both coils. This validation consisted of detailed Finite Integration Technique simulations, confirmed by MR thermometry and Burn:x-wiley:07403194:media:MRM24175:tex2gif-stack-1 measurements in a phantom and in vivo temperature measurements. The safety studies demonstrated that the presence of the 31P endorectal coil had no influence on the specific absorption rate levels and temperature distribution of the external eight-channel 1H array coil. To stay within a 10 g averaged local specific absorption rate of 10 W/kg, a maximum time-averaged input power of 33 W for the 1H array coil was allowed. For transmitting with the 31P endorectal coil, our safety limit of less than 1°C temperature increase in vivo during a 15-min MR spectroscopic imaging experiment was reached at a time-averaged input power of 1.9 W. With this power setting, a second in vivo measurement was performed on a healthy volunteer. Using adiabatic excitation, 3D 31P MR spectroscopic imaging produced spectra from the entire prostate in 18 min with a spatial resolution of 4 cm3. The spectral resolution enabled the separate detection of phosphocholine, phosphoethanolamine, inorganic phosphate, and other metabolites that could play an important role in the characterization of prostate cancer.}, language = {en} } @article{KlompBitzHeerschapetal.2009, author = {Klomp, D. W. J. and Bitz, Andreas and Heerschap, A. and Scheenen, T. W. J.}, title = {Proton spectroscopic imaging of the human prostate at 7 T}, series = {NMR in Biomedicine}, volume = {22}, journal = {NMR in Biomedicine}, number = {5}, issn = {1099-1492}, doi = {10.1002/nbm.1360}, pages = {495 -- 501}, year = {2009}, language = {en} } @article{KlingeWilkeMuehl2012, author = {Klinge, Uwe and Wilke, Ralf and M{\"u}hl, Thomas}, title = {Auswahl der Herniennetze nach der "effektiven Porosit{\"a}t" - warum das Gewicht weniger wichtig ist}, series = {Chirurgische Allgemeine : CHAZ ; Zeitung f{\"u}r Klinik und Praxis}, volume = {13}, journal = {Chirurgische Allgemeine : CHAZ ; Zeitung f{\"u}r Klinik und Praxis}, number = {12}, publisher = {Kaden}, address = {Mannheim}, isbn = {1615-5378}, pages = {297 -- 301}, year = {2012}, language = {de} } @article{KlingeOttoMuehl2015, author = {Klinge, Uwe and Otto, Jens and M{\"u}hl, Thomas}, title = {High Structural Stability of Textile Implants Prevents Pore Collapse and Preserves Effective Porosity at Strain}, series = {BioMed Research International}, volume = {2015}, journal = {BioMed Research International}, issn = {2314-6133 (Print)}, doi = {10.1155/2015/953209}, pages = {7 pages}, year = {2015}, language = {en} } @inproceedings{KirschMatareFerreinetal.2020, author = {Kirsch, Maximilian and Matar{\´e}, Victor and Ferrein, Alexander and Schiffer, Stefan}, title = {Integrating golog++ and ROS for Practical and Portable High-level Control}, series = {12th International Conference on Agents and Artificial Intelligence}, booktitle = {12th International Conference on Agents and Artificial Intelligence}, doi = {10.5220/0008984406920699}, year = {2020}, language = {en} } @inproceedings{KallweitFerreinScholletal.2014, author = {Kallweit, Stephan and Ferrein, Alexander and Scholl, Ingrid and Reichert, Walter}, title = {Mobile Autonome Systeme in der Lehre, am Beispiel der ROS Summer School}, series = {Tagungsband AALE 2014 : das Forum f{\"u}r Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 11. Fachkonferenz, Regensburg ; [11. Konferenz f{\"u}r Angewandte Automatisierungstechnik in Lehre und Entwicklung / Ostbayerische Technische Hochschule Regensburg; VFAALE, Verein der Freunde und F{\"o}rderer der Angewandten Automatisierungstechnik]}, booktitle = {Tagungsband AALE 2014 : das Forum f{\"u}r Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 11. Fachkonferenz, Regensburg ; [11. Konferenz f{\"u}r Angewandte Automatisierungstechnik in Lehre und Entwicklung / Ostbayerische Technische Hochschule Regensburg; VFAALE, Verein der Freunde und F{\"o}rderer der Angewandten Automatisierungstechnik]}, publisher = {Dt. Industrieverl.}, address = {M{\"u}nchen}, isbn = {978-3-8356-7142-3}, pages = {157 -- 163}, year = {2014}, language = {de} } @article{JensKaldenhoffKirschnerHermannsetal.2014, author = {Jens, Otto and Kaldenhoff, E. and Kirschner-Hermanns, R. and M{\"u}hl, Thomas and Klinge, Uwe}, title = {Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates}, series = {Journal of biomedical materials research. Part A}, volume = {102}, journal = {Journal of biomedical materials research. Part A}, number = {4}, publisher = {Wiley}, address = {New York}, issn = {1552-4965}, doi = {10.1002/jbm.a.34767}, pages = {1079 -- 1084}, year = {2014}, abstract = {Use of textile structures for reinforcement of pelvic floor structures has to consider mechanical forces to the implant, which are quite different to the tension free conditions of the abdominal wall. Thus, biomechanical analysis of textile devices has to include the impact of strain on stretchability and effective porosity. Prolift® and Prolift + M®, developed for tension free conditions, were tested by measuring stretchability and effective porosity applying mechanical strain. For comparison, we used Dynamesh-PR4®, which was designed for pelvic floor repair to withstand mechanical strain. Prolift® at rest showed moderate porosity with little stretchability but complete loss of effective porosity at strain of 4.9 N/cm. Prolift + M® revealed an increased porosity at rest, but at strain showed high stretchability, with subsequent loss of effective porosity at strain of 2.5 N/cm. Dynamesh PR4® preserved its high porosity even under strain, but as consequence of limited stretchability. Though in tension free conditions Prolift® and Prolift + M® can be considered as large pore class I meshes, application of mechanical strain rapidly lead to collapse of pores. The loss of porosity at mechanical stress can be prevented by constructions with high structural stability. Assessment of porosity under strain was found helpful to define requirements for pelvic floor devices. Clinical studies have to prove whether devices with high porosity as well as high structural stability can improve the patients' outcome.}, language = {en} } @techreport{JaekelKleinBarthetal.1996, author = {Jaekel, C. and Klein, C. and Barth, R. and Roskos, H. and Kyas, G. and Schroeer, M. and H{\"u}ning, Felix}, title = {Dynamik von Nichtgleichgewichtszustaenden in Hochtemperatursupraleitern Abschlussbericht}, pages = {47 Seiten}, year = {1996}, abstract = {Im Projekt wurden mit Hilfe zeitaufgeloester optischer Messtechniken Relaxations-Dynamiken von optisch angeregten Ladungstraegern und Hochfrequenzeigenschaften von Hochtemperatursupraleitern untersucht. Oberhalb der Sprungtemperatur wurden die Elektron-Phonon-Kopplungskonstanten fuer YBCO und BSCCO bestimmt. Dabei wurde erstmalig ein direkter Zusammenhang zwischen der Sprungtemperatur und der Kopplungstaerke gefunden. Der Kopplungsmechanismus enthaelt sowohl phononische als auch elektronische (spindynamische) Anteile. Unterhalb von T_c wird die Dynamik durch Aufbrechen und Rekombination von Cooper-Paaren bestimmt. Bei den Arbeiten zu den kohaerenten Phononen wurde ein Modell entwickelt, das das 'Anwerfen' der Phononen und das Amplitudenverhalten unterhalb der Sprungtemperatur erklaert. Als begleitende Untersuchungen wurden breitbandige Hochfrequenz-Messungen vorgenommen. Die Methode erlaubt die Untersuchung von Ladungstraegerdichten und von Streumechanismen. Erstmalig wurde in verspannten YBCO-Duennfilmen eine starke temperaturabhaengige Resonanz-Absorption beobachtet, die als Josephson-Plasmaresonanz an intrinsischen Kontakten identifiziert werden konnte. Die Nutzbarkeit dieser Kontakte fuer Bauelemente wurde durch einen Mikrowellendetektor demonstriert. Durch den Nachweis von emittierter gepulster Strahlung aus einer stromdurchflossenen supraleitenden Bruecke nach optischer Anregung wurde erstmals die Einsatzmoeglichkeit von HTSL fuer schnelle optische Schalter demonstriert. Es wurde gezeigt, dass die Schaltgeschwindigkeit eine direkte Folge der Ladungstraegerdynamik ist.}, language = {de} } @incollection{IbanezSanchezWolf2020, author = {Ibanez-Sanchez, Gema and Wolf, Martin}, title = {Interactive Process Mining-Induced Change Management Methodology for Healthcare}, series = {Interactive Process Mining in Healthcare}, booktitle = {Interactive Process Mining in Healthcare}, publisher = {Springer}, address = {Cham}, isbn = {978-3-030-53993-1 (Online)}, doi = {10.1007/978-3-030-53993-1_16}, pages = {267 -- 293}, year = {2020}, abstract = {The adoption of the Digital Health Transformation is a tremendous paradigm change in health organizations, which is not a trivial process in reality. For that reason, in this chapter, it is proposed a methodology with the objective to generate a changing culture in healthcare organisations. Such a change culture is essential for the successful implementation of any supporting methods like Interactive Process Mining. It needs to incorporate (mostly) new ways of team-based and evidence-based approaches for solving structural problems in a digital healthcare environment.}, language = {en} } @article{HueningWilkeNakielskietal.1997, author = {H{\"u}ning, Felix and Wilke, I. and Nakielski, G. and Kotzler, J.}, title = {Dynamic conductivity of YBCO thin films from low to very high frequencies / Wilke, I. ; Nakielski, G. ; Kotzler, J. ; Subke, K. O. ; Jaekel, C. ; H{\"u}ning, F. ; Roskos, H. G. ; Kurz, Heinrich}, series = {Applied superconductivity 1997 : proceedings of EUCAS 1997, the Third European Conference on Applied Superconductivity, held in the Netherlands, 30 June - 3 July 1997 / ed. by H. Rogalla}, journal = {Applied superconductivity 1997 : proceedings of EUCAS 1997, the Third European Conference on Applied Superconductivity, held in the Netherlands, 30 June - 3 July 1997 / ed. by H. Rogalla}, publisher = {IOP}, address = {Bristol}, isbn = {0-7503-0487-1}, pages = {121 -- 124}, year = {1997}, language = {en} } @inproceedings{HueningWacheMagiera2021, author = {H{\"u}ning, Felix and Wache, Franz-Josef and Magiera, David}, title = {Redundant bus systems using dual-mode radio}, series = {Proceedings of Sixth International Congress on Information and Communication Technology}, booktitle = {Proceedings of Sixth International Congress on Information and Communication Technology}, publisher = {Springer}, address = {Singapore}, isbn = {978-981-16-2379-0}, doi = {10.1007/978-981-16-2380-6_73}, pages = {835 -- 842}, year = {2021}, abstract = {Communication via serial bus systems, like CAN, plays an important role for all kinds of embedded electronic and mechatronic systems. To cope up with the requirements for functional safety of safety-critical applications, there is a need to enhance the safety features of the communication systems. One measure to achieve a more robust communication is to add redundant data transmission path to the applications. In general, the communication of real-time embedded systems like automotive applications is tethered, and the redundant data transmission lines are also tethered, increasing the size of the wiring harness and the weight of the system. A radio link is preferred as a redundant transmission line as it uses a complementary transmission medium compared to the wired solution and in addition reduces wiring harness size and weight. Standard wireless links like Wi-Fi or Bluetooth cannot meet the requirements for real-time capability with regard to bus communication. Using the new dual-mode radio enables a redundant transmission line meeting all requirements with regard to real-time capability, robustness and transparency for the data bus. In addition, it provides a complementary transmission medium with regard to commonly used tethered links. A CAN bus system is used to demonstrate the redundant data transfer via tethered and wireless CAN.}, language = {en} } @inproceedings{HueningStuettgen2021, author = {H{\"u}ning, Felix and St{\"u}ttgen, Marcel}, title = {Work in Progress: Interdisciplinary projects in times of COVID-19 crisis - challenges, risks and chances}, series = {2021 IEEE Global Engineering Education Conference (EDUCON)}, booktitle = {2021 IEEE Global Engineering Education Conference (EDUCON)}, doi = {10.1109/EDUCON46332.2021.9454006}, pages = {1175 -- 1179}, year = {2021}, language = {en} } @article{HueningSpartaRedhammeretal.2001, author = {H{\"u}ning, Felix and Sparta, K. and Redhammer, G. J. and Roussel, P.}, title = {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. ; G{\"u}ntherrodt, G. ; H{\"u}ning, F. ; Lueken, H. ; Kageyama, H. ; Onizuka, K ; Ueda}, series = {The European Physical Journal B - Condensed Matter and Complex Systems. 19 (2001), H. 4}, journal = {The European Physical Journal B - Condensed Matter and Complex Systems. 19 (2001), H. 4}, publisher = {-}, isbn = {1434-6036}, pages = {507 -- 516}, year = {2001}, language = {en} } @inproceedings{HueningMund2023, author = {H{\"u}ning, Felix and Mund, Cindy}, title = {Integration of agile development in standard labs}, series = {51st Annual Conference of the European Society for Engineering Education (SEFI)}, booktitle = {51st Annual Conference of the European Society for Engineering Education (SEFI)}, doi = {10.21427/NK4Z-WS73}, pages = {11 Seiten}, year = {2023}, abstract = {In addition to the technical content, modern courses at university should also teach professional skills to enhance the competencies of students towards their future work. The competency driven approach including technical as well as professional skills makes it necessary to find a suitable way for the integration into the corresponding module in a scalable and flexible manner. Agile development, for example, is essential for the development of modern systems and applications and makes use of dedicated professional skills of the team members, like structured group dynamics and communication, to enable the fast and reliable development. This paper presents an easy to integrate and flexible approach to integrate Scrum, an agile development method, into the lab of an existing module. Due to the different role models of Scrum the students have an individual learning success, gain valuable insight into modern system development and strengthen their communication and organization skills. The approach is implemented and evaluated in the module Vehicle Systems, but it can be transferred easily to other technical courses as well. The evaluation of the implementation considers feedback of all stakeholders, students, supervisor and lecturers, and monitors the observations during project lifetime.}, language = {en} } @article{HueningLukenSchilderetal.2001, author = {H{\"u}ning, Felix and Luken, Heiko and Schilder, Herbert and Eifert, Thomas}, title = {Magnetochemistry: Compounds and Concepts / Lueken, Heiko ; Schilder, Herbert ; Eifert, Thomas ; Handrick, Klaus ; H{\"u}ning, Felix}, series = {Advances in Solid State Physics. 201 (2001)}, journal = {Advances in Solid State Physics. 201 (2001)}, publisher = {-}, pages = {515 -- 532}, year = {2001}, language = {en} } @article{HueningLeineweberJacobsetal.1999, author = {H{\"u}ning, Felix and Leineweber, A. and Jacobs, H. and Lueken, H.}, title = {ε-Fe3N: magnetic structure, magnetization and temperature dependent disorder of nitrogen / Leineweber, A. ; Jacobs, H. ; H{\"u}ning, F. ; Lueken, H. ; Schilder, H. ; Kockelmann, W.}, series = {Journal of Alloys and Compounds. 288 (1999), H. 1-2}, volume = {288}, journal = {Journal of Alloys and Compounds. 288 (1999), H. 1-2}, number = {1-2}, publisher = {Elsevier}, address = {Amsterdam}, isbn = {1873-4669}, pages = {79 -- 87}, year = {1999}, abstract = {ε-Fe3N has been investigated by time-of-flight neutron diffraction (temperature range 4.2-618 K) and SQUID magnetometry (2-700 K, B≤5 T). A ferromagnetic spin structure is observed with magnetic moments oriented perpendicular to the c-axis of the hexagonal nuclear structure. The magnetic saturation moment of iron is 2.2 μB at 4.2 K from neutron diffraction and 2.0 μB from magnetic measurements and decreases in a Brillouin-like manner on heating to TC=575 K. Above 450 K an increasing but reversible disorder of the nitrogen partial structure is observed.}, language = {en} } @article{HueningLeineweberJacobsetal.2001, author = {H{\"u}ning, Felix and Leineweber, A. and Jacobs, H. and Lueken, H.}, title = {Nitrogen Ordering and ferromagnetic properties of -Fe3N1+x (0.10  x  0.39) and -Fe3(N0.80C0.20)1.38 / Leineweber, A. ; Jacobs, H. ; H{\"u}ning, F. ; Lueken, H. ; Kockelmann, W.}, series = {Journal of Alloys and Compounds. 316 (2001), H. 1-2}, journal = {Journal of Alloys and Compounds. 316 (2001), H. 1-2}, publisher = {-}, isbn = {1873-4669}, pages = {21 -- 38}, year = {2001}, language = {en} } @article{HueningJaekelFrancoisetal.1996, author = {H{\"u}ning, Felix and Jaekel, C. and Francois, I. and Kyas, G.}, title = {Microwave surface impedance measurements on high-Tc superconductors / Jaekel, C. ; Francois, I. ; Kyas, G. ; H{\"u}ning, F. ; Roskos, H. G. ; Borghs, G. ; Kurz, H.}, series = {Czechoslovak Journal of Physics. 46 (1996), H. Suppl. 2}, journal = {Czechoslovak Journal of Physics. 46 (1996), H. Suppl. 2}, number = {46}, publisher = {Springer Science+Business Media}, address = {Dordrecht}, isbn = {1572-9486}, pages = {1117 -- 1118}, year = {1996}, language = {en} } @article{HueningHeuermannWacheetal.2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef and Jajo, Rami Audisho}, title = {A new wireless sensor interface using dual-mode radio}, series = {Journal of Sensors and Sensor Systems : JSSS}, volume = {Volume 7}, journal = {Journal of Sensors and Sensor Systems : JSSS}, number = {2}, publisher = {Copernicus Publ.}, address = {G{\"o}ttingen}, doi = {10.5194/jsss-7-507-2018}, pages = {507 -- 515}, year = {2018}, abstract = {The integration of sensors is one of the major tasks in embedded, control and "internet of things" (IoT) applications. For the integration mainly digital interfaces are used, starting from rather simple pulse-width modulation (PWM) interface to more complex interfaces like CAN (Controller Area Network). Even though these interfaces are tethered by definition, a wireless realization is highly welcome in many applications to reduce cable and connector cost, increase the flexibility and realize new emerging applications like wireless control systems. Currently used wireless solutions like Bluetooth, WirelessHART or IO-Link Wireless use dedicated communication standards and corresponding higher protocol layers to realize the wireless communication. Due to the complexity of the communication and the protocol handling, additional latency and jitter are introduced to the data communication that can meet the requirements for many applications. Even though tunnelling of other bus data like CAN data is generally also possible the latency and jitter prevent the tunnelling from being transparent for the bus system. Therefore a new basic technology based on dual-mode radio is used to realize a wireless communication on the physical layer only, enabling a reliable and real-time data transfer. As this system operates on the physical layer it is independent of any higher layers of the OSI (open systems interconnection) model. Hence it can be used for several different communication systems to replace the tethered physical layer. A prototype is developed and tested for real-time wireless PWM, SENT (single-edge nibble transmission) and CAN data transfer with very low latency and jitter.}, language = {en} } @inproceedings{HueningHeuermannWache2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef}, title = {Wireless CAN}, series = {Tagungsband AALE 2018 : das Forum f{\"u}r Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 15. Fachkonferenz, Regensburg ; [15. Konferenz f{\"u}r Angewandte Automatisierungstechnik in Lehre und Entwicklung / TH K{\"o}ln; VFAALE, Verein der Freunde und F{\"o}rderer der Angewandten Automatisierungstechnik]}, booktitle = {Tagungsband AALE 2018 : das Forum f{\"u}r Fachleute der Automatisierungstechnik aus Hochschulen und Wirtschaft ; 15. Fachkonferenz, Regensburg ; [15. Konferenz f{\"u}r Angewandte Automatisierungstechnik in Lehre und Entwicklung / TH K{\"o}ln; VFAALE, Verein der Freunde und F{\"o}rderer der Angewandten Automatisierungstechnik]}, publisher = {VDE Verlag}, pages = {135 -- 144}, year = {2018}, abstract = {Das vorgestellte System zu Wireless CAN bietet die M{\"o}glichkeit, CAN kabellos zu {\"u}bertragen. Beide vorgestellten und entwickelten Konzepte funktionieren korrekt und erm{\"o}glichen den Auf-bau von kabellosen CAN Schnittstellen. Durch den kleinen Aufbau kann diese Technologie auch f{\"u}r eingebettete Systeme verwendet werden. Zudem bietet dieser Ansatz die M{\"o}glichkeit, durch die Entwicklung von geeigneten ICs die Gr{\"o}ße des Systems bis auf Bauteilgr{\"o}ße zu reduzieren, um eine noch bessere Integration in eingebettete Systeme zu erm{\"o}glichen. Dadurch wird die Technologie attraktiv f{\"u}r Einsatzgebiete, wo die oben aufgelisteten Vorteile zum Tragen kommen k{\"o}nnen. Diese Einsatzgebiete k{\"o}nnen sowohl im Automobil als auch im Industriebereich liegen.}, language = {de} } @article{HueningHeuermannWache2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef}, title = {Wireless CAN}, series = {Etz: Elektrotechnik \& Automation}, volume = {139}, journal = {Etz: Elektrotechnik \& Automation}, number = {10}, publisher = {VDE-Verlag}, address = {Wuppertal}, issn = {0170-1711}, pages = {22 -- 26}, year = {2018}, abstract = {In modernen elektronischen und mechatronischen Systemen, z. B. im industriellen oder automobil Bereich, kommunizieren eingebettete Steuerger{\"a}te und Sensoren vielfach {\"u}ber Bussysteme wie CAN oder LIN. Die Kommunikation findet in der Regel drahtgebunden statt, so dass der Kabelbaum f{\"u}r die Kommunikation sehr groß werden kann. Daher ist es naheliegend, Leitungen und dazugeh{\"o}rige Stecker, z. B. f{\"u}r nicht-sicherheitskritische Komfortsysteme, einzusparen und diese durch gerichtete Funkstrecken f{\"u}r kurze Entfernungen zu ersetzen. Somit k{\"o}nnten Komponenten wie ECUs oder Sensoren kabel- und steckerlos in ein Bussystem integriert werden. Zudem ist eine einfache galvanische und mechanische Trennung zu erreichen. Funk{\"u}bertragung wird bei diesen Bussystemen derzeit nicht eingesetzt, da insbesondere die Echtzeitf{\"a}higkeit und die Robustheit der vorhandenen Funksysteme nicht den Anforderungen der Anwendungen entspricht. Zudem sind bestehende Funksysteme wie WLAN oder Bluetooth im Vergleich zur konventionellen Verkabelung teuer und es besteht hierbei die M{\"o}glichkeit, dass sie ausspioniert werden k{\"o}nnen und so sensible Daten entwendet werden k{\"o}nnen. In dieser Arbeit wird eine alternative Realisierung zu den bestehenden Funksystemen vorgestellt, die aus wenigen Komponenten aufzubauen ist. Es ist eine protokolllose, echtzeitf{\"a}hige {\"U}bertragung m{\"o}glich und somit die transparente Integration in ein Bussystem wie CAN.}, language = {de} } @article{HueningHeuermannWache2018, author = {H{\"u}ning, Felix and Heuermann, Holger and Wache, Franz-Josef}, title = {Wireless CAN without WLAN or Bluetooth}, series = {CAN Newsletter}, journal = {CAN Newsletter}, number = {December 2018}, pages = {44 -- 46}, year = {2018}, abstract = {In two developed concepts, dual-mode radio enables CAN participants to be integrated wirelessly into a CAN network. Constructed from a few components, a protocol-free, real-time transmission and thus transparent integration into CAN is provided.}, language = {en} } @article{HueningEifertLuekenetal.2002, author = {H{\"u}ning, Felix and Eifert, T. and Lueken, H. and Schmidt, P.}, title = {High-temperature series expansion of the magnetic susceptibility of extended magnetic systems in a complete computer implementation / Eifert, T. ; H{\"u}ning, F. ; Lueken, H. ; Schmidt, P. ; Thiele, G.}, series = {Chemical Physics Letters. 364 (2002), H. 1-2}, journal = {Chemical Physics Letters. 364 (2002), H. 1-2}, publisher = {-}, isbn = {0009-2614}, pages = {69 -- 74}, year = {2002}, language = {en} } @article{HueningEifertHandricketal.2006, author = {H{\"u}ning, Felix and Eifert, T. and Handrick, K. and Neuhausen, U.}, title = {Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; H{\"u}ning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H.}, series = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie (ZAAC) - Journal of Inorganic and General Chemistry . 632 (2006), H. 4}, journal = {Zeitschrift f{\"u}r Anorganische und Allgemeine Chemie (ZAAC) - Journal of Inorganic and General Chemistry . 632 (2006), H. 4}, publisher = {-}, isbn = {1521-3749}, pages = {521 -- 529}, year = {2006}, language = {en} } @article{HueningEifertHandricketal.2006, author = {H{\"u}ning, Felix and Eifert, T. and Handrick, K. and Neuhausen, U.}, title = {Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; H{\"u}ning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H.}, series = {20 Jahre Wilhelm-Klemm-Stiftung / Kuratorium der Wilhelm-Klemm-Stiftung (Hrsg.)}, journal = {20 Jahre Wilhelm-Klemm-Stiftung / Kuratorium der Wilhelm-Klemm-Stiftung (Hrsg.)}, publisher = {Shaker}, address = {Aachen}, isbn = {978-3-8322-5520-6}, pages = {193ff}, year = {2006}, language = {en} } @article{HueningDeMatteis2020, author = {H{\"u}ning, Felix and De Matteis, Stefan}, title = {Entwicklung eines taktilen HMI f{\"u}r sehbehinderte und blinde Nutzerinnen und Nutzer}, series = {Blind - sehbehindert}, volume = {140}, journal = {Blind - sehbehindert}, number = {2}, publisher = {Edition Bentheim}, address = {W{\"u}rzburg}, issn = {0176-7836}, pages = {9 -- 19}, year = {2020}, language = {de} } @article{HueningBackes2020, author = {H{\"u}ning, Felix and Backes, Andreas}, title = {Direct observation of large Barkhausen jump in thin Vicalloy wires}, series = {IEEE Magnetics Letters}, volume = {11}, journal = {IEEE Magnetics Letters}, number = {Art. 2506504}, publisher = {IEEE}, address = {New York, NY}, isbn = {1949-307X}, doi = {10.1109/LMAG.2020.3046411}, pages = {1 -- 4}, year = {2020}, language = {en} } @misc{HueningBackes2022, author = {H{\"u}ning, Felix and Backes, Andreas}, title = {Wiegand-Modul}, year = {2022}, abstract = {Ein Wiegand-Modul (110;210;310) umfassend- eine Sensorspule (112;212;312),- einen ersten Wiegand-Draht (116a;216a;316a), der zumindest teilweise innerhalb der Sensorspule (112;212;312) angeordnet ist, und- einen zweiten Wiegand-Draht (116b;216b;316b), der zumindest teilweise innerhalb der Sensorspule (112;212;312) angeordnet ist und sich im Wesentlichen parallel zu dem ersten Wiegand-Draht (116a;216a;316a) erstreckt, ist bekannt.Um eine effiziente Ausnutzung der durch die Ummagnetisierung der Wiegand-Dr{\"a}hte (116a,116b;216a,216b;316a,316b) in die Sensorspule (112;212;312) induzierten elektrischen Energie zu erm{\"o}glichen, sind der erste Wiegand-Draht (116a;216a;316a) und der zweite Wiegand-Draht (116b;216b;316b) bezogen auf eine axiale Richtung der Sensorspule (112;212;312) versetzt zueinander angeordnet.}, language = {de} } @article{Huening2008, author = {H{\"u}ning, Felix}, title = {Die Anforderungen steigen : Entwicklungstrends bei MOSFETs f{\"u}r den Automobilbereich}, series = {Elektronik-Industrie. 39 (2008), H. 5}, journal = {Elektronik-Industrie. 39 (2008), H. 5}, publisher = {-}, isbn = {0174-5522}, pages = {74 -- 76}, year = {2008}, language = {de} }