TY - JOUR A1 - Krause, Gregor A1 - Rodriguez, Jackson A1 - Stopic, Srecko A1 - Friedrich, Bernd T1 - Feasibility assessment of electrocoagulation towards a new sustainable wastewater treatment / Rodriguez, Jackson ; Stopic, Srecko ; Krause Gregor ; Friedrich, Bernd JF - Environmental Science and Pollution Research. 14 (2007), H. 7 Y1 - 2007 SN - 0944-1344 SP - 477 EP - 482 ER - TY - JOUR A1 - Krause, Gregor A1 - Peifer, Hermann-Josef A1 - Rütten, Jan T1 - Wo bleibt das intelligente Haus? JF - Elektor (2001) Y1 - 2001 N1 - Printausgabe in Bibliothek Eupener Str.: 23 Z 091 SP - 38 EP - 42 ER - TY - JOUR A1 - Krause, Gregor A1 - Neubert, R. A1 - Pietsch, R. T1 - Investigations of Electrical Aging in Polymers under High AC-Field Strength JF - 1990 annual report : October 28 - October 31, 1990 / sponsored by the IEEE Dielectrics and Electrical Insulation Society Y1 - 1990 N1 - Conference on Electrical Insulation and Dielectric Phenomena ; (59, 1990, Pocono Manor, Pa.) PB - IEEE Service Center CY - Piscataway, N.J ER - TY - JOUR A1 - Krause, Gregor A1 - Neubert, R. A1 - Pietsch, R. T1 - Elektrische Eigenschaften von Kunststoffen Y1 - 1991 N1 - Abschlußbericht 1991 Sonderforschungsbereich 106. RWTH Aachen. "Korrelation von Fertigung und Bauteileigenschaften bei Kunststoffen" PB - RWTH CY - Aachen ER - TY - JOUR A1 - Krause, Gregor A1 - Möller, K. A1 - Meurer, D. T1 - Dielectric phenomena in semicrystalline polymers JF - IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 2 Y1 - 1989 N1 - Digital Object Identifier 10.1109/14.90276 SP - 215 EP - 222 ER - TY - JOUR A1 - Krause, Gregor A1 - Meurer, D. A1 - Klee, D. T1 - Space Charge Formation Related to the Morphology of Polymers JF - ISE 6 : 6th International symposium on electrets : Papers Y1 - 1988 N1 - International Symposium on Electrets <6, 1988, Oxford> PB - IEEE CY - Piscataway, NY ER - TY - JOUR A1 - Krause, Gregor A1 - Meurer, D. A1 - Klee, D. T1 - Space charge formation related to the morphology of polymers JF - IEEE Transaction on Electrical Insulation. Vol. 24 (1989), H. No. 3 Y1 - 1989 N1 - Digital Object Identifier 10.1109/14.30883 SP - 215 EP - 222 ER - TY - JOUR A1 - Krause, Gregor A1 - Kehle, Uwe T1 - Unterstützung des Motorhochlaufs eines Pumpspeicherkraftwerks durch Mittel der Blindleistungskompensation / Uwe Kehle, Gregor Krause JF - Ertüchtigung von Kraftwerken und Netzen, insbesondere in den neuen Bundesländern. Energietechnische Gesellschaft am 20. und 21. Oktober 1993 in Mannheim Y1 - 1993 SN - 3-8007-1967-3 N1 - ETG-Fachbericht ; 47 SP - 287 EP - 296 PB - VDE-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Krause, Gregor A1 - Göttlich, S. A1 - Möller, K. A1 - Neubert, R. T1 - Dielektrisches Alterungsmodell hochpolymerer Isolierstoffe / S. Göttlich, G. Krause, K. Möller, R. Neubert, R. Pietsch JF - Isoliersysteme der elektrischen Energietechnik. Lebensdauer, Diagnostik und Entwicklungstendenzen ; Vorträge der ETG-Fachtagung am 26. und 27. Mai 1992 in Würzburg Y1 - 1992 SN - 3-8007-1828-6 N1 - ETG-Fachbericht ; 40 SP - 49 EP - 54 PB - vde-Verl. CY - Berlin [u.a.] ER - TY - JOUR A1 - Krause, Gregor A1 - Göttlich, S. A1 - Möller, K. A1 - Meurer, D. T1 - Space Charge Phenomena in Partially Crystalline Polymers: On-Line Measurement of Charge Carrier Motion under High AC-Field Strength / G. Krause, S. Göttlich, K. Möller, D. Meurer JF - Proceedings of the 3rd International Conference on Conduction and Breakdown in Solid Dielectrics : Trondheim, Norway ... 1989 Y1 - 1989 N1 - International Conference on Conduction and Breakdown in Solid Dielectrics <3, 1989, Trondheim> PB - IEEE CY - Piscataway, N.J. ER - TY - JOUR A1 - Krause, Gregor A1 - Fruth, Bernhard A1 - Krause, Gregor A1 - Meurer, D. T1 - Einfluß der Verarbeitungsverfahren und verarbeitungsbedingter Werkstoffzusätze auf die dielektrischen Eigenschaften von Kunststoffen / B. Fruth, G. Krause, D. Meurer, K. Möller Y1 - 1988 N1 - Ergebnisbericht 1986-87-88 Sonderforschungsbereich 106 RWTH Aachen: "Korrelation von Fertigung und Bauteileeigenschaften bei Kunststoffen" CY - Aachen ER - TY - JOUR A1 - Krause, Gregor A1 - Fruth, Bernhard T1 - Dielectric Properties of Polyolefins Stressed by High Electrical Fields. Fruth, B. ; Krause, G. Y1 - 1987 N1 - Fifth International Symposium on High Voltage Engineering : Proceedings; Braunschweig, Stadthalle, August, 24-28, 1987 / International Symposium on High Voltage Engineering <5, 1987, Braunschweig> ER - TY - JOUR A1 - Krause, Gregor A1 - Fruth, B. T1 - Dielectric Properties of Polyolefins Stressed by High Electrical Fields / Fruth, B. ; Krause, G. JF - 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. Guzmán ; A. Santamaria Y1 - 1988 SN - 3-85739-220-7 N1 - International Symposium on Polymer Materials <1987, San Sebastián, Golfo de Vizcaya> PB - Huethig & Wepf CY - Basel ER - TY - JOUR A1 - Krause, Gregor A1 - Forsyth, Paul A. A1 - Peter, Till T1 - Robuste Filter in der Energieversorgung / Paul A. Forsyth, Gregor Krause, Till Peter JF - ETZ. 114 (1993), H. 22 Y1 - 1993 N1 - Printausgabe: Aachen Eupener Str.: 23 Z 133; Jülich: 63 ZS 035 SP - 1382 EP - 1385 ER - TY - JOUR A1 - Krause, Gregor T1 - High Field Phenomena of Polymeric Insulation Investigated at PE Needle-Plane Specimen JF - Seventh International Symposium on High Voltage Engineering : Dresden, August 26 - 30, 1991 / Technische Universität Dresden Y1 - 1991 N1 - International Symposium on High Voltage Engineering ; (7, 1991, Dresden); International Symposium on High Voltage Engineering (ISH) ; (7 : ; 1991.08.26-30 : ; Dresden) PB - TU Dresden CY - Dresden ER - TY - JOUR A1 - Krause, Gregor T1 - Verhandeln statt Energiesparen? Über den Umgang mit Preisnachlässen im Energiebereich JF - extrACT: Das Magazin der Fachhochschule Aachen (2001) Y1 - 2001 SP - 22 EP - 23 ER - TY - JOUR A1 - Kraff, Oliver A1 - Wrede, Karsten H. A1 - Schoemberg, Tobias A1 - Dammann, Philipp A1 - Noureddine, Yacine A1 - Orzada, Stephan A1 - Ladd, Mark E. A1 - Bitz, Andreas T1 - MR safety assessment of potential RF heating from cranial fixation plates at 7 T JF - Medical Physics Y1 - 2013 U6 - https://doi.org/10.1118/1.4795347 SN - 2473-4209 VL - 40 IS - 4 SP - 042302-1 EP - 042302-10 PB - Wiley CY - Hoboken ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Kruszona, Stefan A1 - Orzada, Stephan A1 - Schaefer, Lena C. A1 - Theysohn, Jens M. A1 - Maderwald, Stefan A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel phased array RF coil for spine MR imaging at 7 T JF - Investigative Radiology Y1 - 2009 U6 - https://doi.org/10.1097/RLI.0b013e3181b24ab7 SN - 1536-0210 VL - 44 IS - 11 SP - 734 EP - 740 PB - Lippincott Williams & Wilkins ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Dammann, Philipp A1 - Ladd, Susanne C. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - An eight-channel transmit/receive multipurpose coil for musculoskeletal MR imaging at 7 T JF - Medical Physics N2 - 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. Y1 - 2010 U6 - https://doi.org/10.1118/1.3517176 SN - 2473-4209 VL - 37 IS - 12 SP - 6368 EP - 6376 PB - Wiley CY - Hoboken, NJ ER - TY - JOUR A1 - Kraff, Oliver A1 - Bitz, Andreas A1 - Breyer, Tobias A1 - Kruszona, Stefan A1 - Maderwald, Stefan A1 - Brote, Irina A1 - Gizewski, Elke R. A1 - Ladd, Mark E. A1 - Quick, Harald H. T1 - A transmit/receive radiofrequency array for imaging the carotid arteries at 7 Tesla: coil design and first in vivo results JF - Investigative Radiology N2 - 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. Y1 - 2011 U6 - https://doi.org/10.1097/RLI.0b013e318206cee4 SN - 1536-0210 VL - 46 IS - 4 SP - 246 EP - 254 PB - Wolters Kluwer CY - Köln ER - TY - JOUR A1 - Kowalewski, Paul A1 - Bragard, Michael A1 - Hüning, Felix A1 - De Doncker, Rik W. T1 - An inexpensive Wiegand-sensor-based rotary encoder without rotating magnets for use in electrical drives JF - IEEE Transactions on Instrumentation and Measurement N2 - 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. KW - Rotary encoder KW - Wiegand sensor Y1 - 2023 U6 - https://doi.org/10.1109/TIM.2023.3326166 SN - 0018-9456 (Print) SN - 1557-9662 (Online) VL - 72 SP - 10 Seiten PB - IEEE CY - New York ER - TY - JOUR A1 - Kobus, Thiele A1 - Bitz, Andreas A1 - Uden, Mark J. van A1 - Lagemaat, Miram W. A1 - Rothgang, Eva A1 - Orzada, Stephan A1 - Heerschap, Arend A1 - Scheenen, Tom W. J. T1 - In vivo 31P MR spectroscopic imaging of the human prostate at 7 T: safety and feasibility JF - Magnetic Resonance in Medicine N2 - 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. Y1 - 2012 U6 - https://doi.org/10.1002/mrm.24175 SN - 1522-2594 VL - 68 IS - 6 SP - 1683 EP - 1695 PB - Wiley-Liss CY - New York ER - TY - JOUR A1 - Kob, Malte A1 - Frauenrath, Tobias T1 - A system for parallel measurement of glottis opening and larynx position JF - Biomedical Signal Processing and Control N2 - The simultaneous assessment of glottal dynamics and larynx position can be beneficial for the diagnosis of disordered voice or speech production and swallowing. Up to now, methods either concentrate on assessment of the glottis opening using optical, acoustical or electrical (electroglottography, EGG) methods, or on visualisation of the larynx position using ultrasound, computer tomography or magnetic resonance imaging techniques. The method presented here makes use of a time-multiplex measurement approach of space-resolved transfer impedances through the larynx. The fast sequence of measurements allows a quasi simultaneous assessment of both larynx position and EGG signal using up to 32 transmit–receive signal paths. The system assesses the dynamic opening status of the glottis as well as the vertical and back/forward motion of the larynx. Two electrode-arrays are used for the measurement of the electrical transfer impedance through the neck in different directions. From the acquired data the global and individual conductivity is calculated as well as a 2D point spatial representation of the minimum impedance. The position information is shown together with classical EGG signals allowing a synchronous visual assessment of glottal area and larynx position. A first application to singing voice analysis is presented that indicate a high potential of the method for use as a non-invasive tool in the diagnosis of voice, speech, and swallowing disorders. KW - EGG KW - Transfer impedance KW - Tomography KW - Larynx position KW - Voice assessment Y1 - 2009 U6 - https://doi.org/10.1016/j.bspc.2009.03.004 SN - 1746-8108 VL - 4 IS - 3 SP - 221 EP - 228 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Klomp, D. W. J. A1 - Bitz, Andreas A1 - Heerschap, A. A1 - Scheenen, T. W. J. T1 - Proton spectroscopic imaging of the human prostate at 7 T JF - NMR in Biomedicine Y1 - 2009 U6 - https://doi.org/10.1002/nbm.1360 SN - 1099-1492 VL - 22 IS - 5 SP - 495 EP - 501 ER - TY - JOUR A1 - Klinge, Uwe A1 - Wilke, Ralf A1 - Mühl, Thomas T1 - Auswahl der Herniennetze nach der “effektiven Porosität” - warum das Gewicht weniger wichtig ist JF - Chirurgische Allgemeine : CHAZ ; Zeitung für Klinik und Praxis Y1 - 2012 SN - 1615-5378 VL - 13 IS - 12 SP - 297 EP - 301 PB - Kaden CY - Mannheim ER - TY - JOUR A1 - Klinge, Uwe A1 - Otto, Jens A1 - Mühl, Thomas T1 - High Structural Stability of Textile Implants Prevents Pore Collapse and Preserves Effective Porosity at Strain JF - BioMed Research International Y1 - 2015 U6 - https://doi.org/10.1155/2015/953209 SN - 2314-6133 (Print) SN - 2314-6141 (Online) N1 - Article ID: 953209 VL - 2015 ER - TY - JOUR A1 - Jens, Otto A1 - Kaldenhoff, E. A1 - Kirschner-Hermanns, R. A1 - Mühl, Thomas A1 - Klinge, Uwe T1 - Elongation of textile pelvic floor implants under load is related to complete loss of effective porosity, thereby favoring incorporation in scar plates JF - Journal of biomedical materials research. Part A N2 - 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. Y1 - 2014 U6 - https://doi.org/10.1002/jbm.a.34767 SN - 1552-4965 VL - 102 IS - 4 SP - 1079 EP - 1084 PB - Wiley CY - New York ER - TY - JOUR A1 - Hüning, Felix A1 - Wilke, I. A1 - Nakielski, G. A1 - Kotzler, J. T1 - Dynamic conductivity of YBCO thin films from low to very high frequencies / Wilke, I. ; Nakielski, G. ; Kotzler, J. ; Subke, K. O. ; Jaekel, C. ; Hüning, F. ; Roskos, H. G. ; Kurz, Heinrich JF - 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 Y1 - 1997 SN - 0-7503-0487-1 N1 - Institute of Physics conference series 158 SP - 121 EP - 124 PB - IOP CY - Bristol ER - TY - JOUR A1 - Hüning, Felix A1 - Sparta, K. A1 - Redhammer, G. J. A1 - Roussel, P. T1 - Structural Phase Transition in the 2D Spin Dimer Compound SrCu2(BO3)2 / Sparta, K. ; Redhammer, G. J. ; Roussel, P. ; Heger, G. ; Roth, G. ; Ionescu, A. Lemmens, P. ; Grove, M. ; Güntherrodt, G. ; Hüning, F. ; Lueken, H. ; Kageyama, H. ; Onizuka, K ; Ueda JF - The European Physical Journal B - Condensed Matter and Complex Systems. 19 (2001), H. 4 Y1 - 2001 SN - 1434-6036 SP - 507 EP - 516 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Luken, Heiko A1 - Schilder, Herbert A1 - Eifert, Thomas T1 - Magnetochemistry: Compounds and Concepts / Lueken, Heiko ; Schilder, Herbert ; Eifert, Thomas ; Handrick, Klaus ; Hüning, Felix JF - Advances in Solid State Physics. 201 (2001) Y1 - 2001 SP - 515 EP - 532 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Leineweber, A. A1 - Jacobs, H. A1 - Lueken, H. T1 - ε-Fe3N: magnetic structure, magnetization and temperature dependent disorder of nitrogen / Leineweber, A. ; Jacobs, H. ; Hüning, F. ; Lueken, H. ; Schilder, H. ; Kockelmann, W. JF - Journal of Alloys and Compounds. 288 (1999), H. 1-2 N2 - 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. Y1 - 1999 SN - 1873-4669 VL - 288 IS - 1-2 SP - 79 EP - 87 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Hüning, Felix A1 - Leineweber, A. A1 - Jacobs, H. A1 - Lueken, H. T1 - Nitrogen Ordering and ferromagnetic properties of -Fe3N1+x (0.10  x  0.39) and -Fe3(N0.80C0.20)1.38 / Leineweber, A. ; Jacobs, H. ; Hüning, F. ; Lueken, H. ; Kockelmann, W. JF - Journal of Alloys and Compounds. 316 (2001), H. 1-2 Y1 - 2001 SN - 1873-4669 SP - 21 EP - 38 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Jaekel, C. A1 - Francois, I. A1 - Kyas, G. T1 - Microwave surface impedance measurements on high-Tc superconductors / Jaekel, C. ; Francois, I. ; Kyas, G. ; Hüning, F. ; Roskos, H. G. ; Borghs, G. ; Kurz, H. JF - Czechoslovak Journal of Physics. 46 (1996), H. Suppl. 2 Y1 - 1996 SN - 1572-9486 IS - 46 SP - 1117 EP - 1118 PB - Springer Science+Business Media CY - Dordrecht ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef A1 - Jajo, Rami Audisho T1 - A new wireless sensor interface using dual-mode radio JF - Journal of Sensors and Sensor Systems : JSSS N2 - 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. Y1 - 2018 U6 - https://doi.org/10.5194/jsss-7-507-2018 VL - Volume 7 IS - 2 SP - 507 EP - 515 PB - Copernicus Publ. CY - Göttingen ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef T1 - Wireless CAN without WLAN or Bluetooth JF - CAN Newsletter N2 - 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. Y1 - 2018 IS - December 2018 SP - 44 EP - 46 ER - TY - JOUR A1 - Hüning, Felix A1 - Heuermann, Holger A1 - Wache, Franz-Josef T1 - Wireless CAN JF - Etz: Elektrotechnik & Automation N2 - In modernen elektronischen und mechatronischen Systemen, z. B. im industriellen oder automobil Bereich, kommunizieren eingebettete Steuergeräte und Sensoren vielfach über Bussysteme wie CAN oder LIN. Die Kommunikation findet in der Regel drahtgebunden statt, so dass der Kabelbaum für die Kommunikation sehr groß werden kann. Daher ist es naheliegend, Leitungen und dazugehörige Stecker, z. B. für nicht-sicherheitskritische Komfortsysteme, einzusparen und diese durch gerichtete Funkstrecken für kurze Entfernungen zu ersetzen. Somit könnten Komponenten wie ECUs oder Sensoren kabel- und steckerlos in ein Bussystem integriert werden. Zudem ist eine einfache galvanische und mechanische Trennung zu erreichen. Funkübertragung wird bei diesen Bussystemen derzeit nicht eingesetzt, da insbesondere die Echtzeitfähigkeit 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 Möglichkeit, dass sie ausspioniert werden können und so sensible Daten entwendet werden können. In dieser Arbeit wird eine alternative Realisierung zu den bestehenden Funksystemen vorgestellt, die aus wenigen Komponenten aufzubauen ist. Es ist eine protokolllose, echtzeitfähige Übertragung möglich und somit die transparente Integration in ein Bussystem wie CAN. Y1 - 2018 SN - 0170-1711 VL - 139 IS - 10 SP - 22 EP - 26 PB - VDE-Verlag CY - Wuppertal ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Lueken, H. A1 - Schmidt, P. T1 - High-temperature series expansion of the magnetic susceptibility of extended magnetic systems in a complete computer implementation / Eifert, T. ; Hüning, F. ; Lueken, H. ; Schmidt, P. ; Thiele, G. JF - Chemical Physics Letters. 364 (2002), H. 1-2 Y1 - 2002 SN - 0009-2614 SP - 69 EP - 74 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Handrick, K. A1 - Neuhausen, U. T1 - Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; Hüning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H. JF - Zeitschrift für Anorganische und Allgemeine Chemie (ZAAC) - Journal of Inorganic and General Chemistry . 632 (2006), H. 4 Y1 - 2006 SN - 1521-3749 SP - 521 EP - 529 PB - - ER - TY - JOUR A1 - Hüning, Felix A1 - Eifert, T. A1 - Handrick, K. A1 - Neuhausen, U. T1 - Computational Magnetochemistry: Complementary Quantum Mechanical Tools / Eifert, T. ; Handrick, K. ; Hüning, F. ; Neuhausen, U. ; Schilder, H. ; Lueken, H. JF - 20 Jahre Wilhelm-Klemm-Stiftung / Kuratorium der Wilhelm-Klemm-Stiftung (Hrsg.) Y1 - 2006 SN - 978-3-8322-5520-6 SP - 193ff PB - Shaker CY - Aachen ER - TY - JOUR A1 - Hüning, Felix A1 - De Matteis, Stefan T1 - Entwicklung eines taktilen HMI für sehbehinderte und blinde Nutzerinnen und Nutzer JF - Blind - sehbehindert Y1 - 2020 SN - 0176-7836 VL - 140 IS - 2 SP - 9 EP - 19 PB - Edition Bentheim CY - Würzburg ER - TY - JOUR A1 - Hüning, Felix A1 - Backes, Andreas T1 - Direct observation of large Barkhausen jump in thin Vicalloy wires JF - IEEE Magnetics Letters Y1 - 2020 SN - 1949-307X U6 - https://doi.org/10.1109/LMAG.2020.3046411 VL - 11 IS - Art. 2506504 SP - 1 EP - 4 PB - IEEE CY - New York, NY ER - TY - JOUR A1 - Hüning, Felix T1 - Hart im Nehmen : Low-Voltage-Powermosfets mit Super-Junction-1-Technologie optimieren JF - Elektronik-Journal. 44 (2009), H. 12 Y1 - 2009 SN - 0013-5674 SP - 36 EP - 38 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Die Anforderungen steigen : Entwicklungstrends bei MOSFETs für den Automobilbereich JF - Elektronik-Industrie. 39 (2008), H. 5 Y1 - 2008 SN - 0174-5522 SP - 74 EP - 76 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Robusti affidabili per le Sfide dell’automotive JF - Selezione di Elettronica (2008) Y1 - 2008 SP - 116 EP - 117 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Mosfet ottimizzati per l’automotive JF - Selezione di Elettronica (2009) Y1 - 2009 SP - 115 EP - 117 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Entwicklungstrends bei MOSFETs für den Automobilbereich JF - Elektronik-Industrie . 39 (2008), H. 5 Y1 - 2008 SN - 0174-5522 SP - 74 EP - 76 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - SMD packages for PowerMOSFETs in automotive applications – developments and trends JF - Automotive Designline Europe (2009) Y1 - 2009 PB - - ER - TY - JOUR A1 - Hüning, Felix T1 - Using Trench PowerMOSFETs in Linear Mode JF - Power Electronics Europe (2012) N2 - If we think about applications for modern Power MOSFETs using trench technology, running them in linear mode may not be top of the priority list. Yet there are multiple uses for Trench Power MOSFETs in linear mode. In fact, even turning the device on and off in switching applications is a form of linear operation. Also, these components can be run in linear mode to protect the device against voltage surges. This article will illustrate the factors that need to be considered for linear operation and show how Trench Power MOSFETs are suited to it. Y1 - 2012 SN - 1748-3530 SP - 27 EP - 29 PB - DFA Media CY - Tonbridge ER - TY - JOUR A1 - Hüning, Felix T1 - PowerMOSFETs in ANL2-Technologie : Ansteuerungen bis in den kW-Bereich mit wenig Verlustleistung und Platzbedarf JF - Elektronik-Industrie Y1 - 2011 SN - 0174-5522 VL - 42 IS - 10 SP - 36 EP - 39 PB - Hüthig CY - Heidelberg ER - TY - JOUR A1 - Hüning, Felix T1 - Nachrüstmöglichkeiten von Dieselfahrzeugen aus technischer Sicht JF - Zeitschrift für Verkehrsrecht : NZV Y1 - 2019 IS - 1 SP - 27 EP - 32 PB - C.H.Beck ER -