TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Line Network Network (LNN): an alternative in-fixture calibration procedure JF - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 45 (1997), H. 3 Y1 - 1997 SN - 0018-9480 SP - 408 EP - 413 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - LNN( Line-Network-Network): The In-Fixture Calibration Procedure Y1 - 1993 N1 - XXIVth General Assembly of the International URSI, Kyoto SP - 149 EP - 149 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - A Generalization of the Txx Network Analyzer Self-Calibration Procedure JF - Conference proceedings : monday 24th to thursday 27th august 1992, Helsinki University of Technology, Espoo, Finland ; [the international conference and exhibition designed for the Microwave Community]. Vol. 2 Y1 - 1992 SN - 0-946821-77-1 N1 - European Microwave Conference <22, 1992, Espoo> ; Teknillinen Korkeakoulu SP - 907 EP - 912 PB - Microwave Exhibitions and Publishers CY - Tunbridge Wells ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Robuster Algorithmus zur Streuparameterbestimmung für systemfehlerkorrigierte Netzwerkanalysatoren JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 35. 1991 (1991) Y1 - 1991 SP - 555 EP - 556 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, Burkhard T1 - Error Corrected Impedance Measurements with a Network Analyzer Y1 - 1994 N1 - 1994 Conference on Precision Electromagnetic Measurements digest : 27 June - 1 July 1994, Boulder, Colorado, USA / Organized by National Institute of Standards and Technology. Ed. by Edie DeWeese SP - 125 EP - 126 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Robust Algorithms for Txx Network Analyzer Self-Calibration Procedures JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 43 (1994), H. 1 Y1 - 1994 SN - 0018-9456 SP - 18 EP - 23 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Results of network analyzer measurements with leakage errors-corrected with direct calibration techniques JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5 Y1 - 1997 SN - 0018-9456 SP - 1120 EP - 1127 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Procedures for the Determination of the Scattering Parameters for Network Analyzer Calibration JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 42 (1993), H. 2 Y1 - 1993 SN - 0018-9456 SP - 528 EP - 531 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - 15-term self-calibration methods for the error-correction of on-wafer measurements JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 46 (1997), H. 5 Y1 - 1997 SN - 0018-9456 SP - 1105 EP - 1110 ER - TY - JOUR A1 - Heuermann, Holger A1 - Schiek, B. T1 - Error corrected impedance measurements with a network analyzer JF - IEEE transactions on instrumentation and measurement : IM / Institute of Electrical and Electronics Engineers, Instrumentation and Measurement Group. 44 (1995), H. 2 Y1 - 1995 SN - 0018-9456 SP - 295 EP - 299 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash A1 - Boehm, H. T1 - Ultra Compact Multi-Mode Filter with Novel Rat-Race Inductor. Sadeghfam, Arash; Heuermann, Holger; Boehm, H. JF - Conference proceedings : 3 - 7 October 2005, CNIT la Défense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 2 Y1 - 2005 SN - 2-9600551-0-1 N1 - European Microwave Conference ; (35, 2005, Paris) ; European Microwave Week ; (2005, Paris) SP - 4 pp. PB - Horizon House Publ CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger JF - European Microwave Conference, 2008, EuMC 2008, 38th Y1 - 2008 SN - 978-2-87487-006-4 SP - 1727 EP - 1730 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Enhanced system architecture for rugged wide band data transmission / Sadeghfam, A. ; Heuermann, H. JF - European Radar Conference, 2009 : EuRAD 2009 ; Sept. 30 - Oct. 2 2009, Rome, Italy ; part of the European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association Y1 - 2009 SN - 978-2-87487-014-9 N1 - Proceedings of the 6th European Radar Conference SP - 347 EP - 350 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - On the design of multimode integrated circuits in multilayered processes / Sadeghfam, A. ; Heuermann, H. JF - European Microwave Conference, 2007, 9-12 Oct. 2007 Y1 - 2007 SN - 978-2-87487-001-9 N1 - EuMC 2007 ; European Microwave Conference ; (37 : ; 2007.10.09-12 : ; Munich) SP - 516 EP - 519 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Electrically tunable bandpass filter with integrated carrier suppression for UHF RFID systems / Sadeghfam, Arash ; Heuermann, Holger JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 306 EP - 309 ER - TY - JOUR A1 - Heuermann, Holger A1 - Sadeghfam, Arash T1 - Novel balanced inductor for compact differential systems / Sadeghfam, Arash; Heuermann, Holger JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 709 EP - 712 PB - Horizon House Publ. CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Rumiantsev, A. A1 - Schott, S. T1 - Advanced on-wafer multiport calibration methods for mono- and mixed-mode device characterization JF - On wafer characterization : 63rd ARFTG conference digest, spring 2004, 11 June 2004, Fort Worth, TX / Automatic RF Techniques Group. [Conference chair: John Cable. Publication chair: J. G. Burns] Y1 - 2004 SN - 0-7803-8371-0 N1 - Microwave Theory and Techniques Society. ; Automatic RF Techniques Group ; ARFTG conference ; (63 : ; 2004.06.11 : ; Fort Worth, Tex.) SP - 91 EP - 96 PB - IEEE Operations Center CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Peters, N. A1 - Schmitz, T. A1 - Sadeghfam, Arash T1 - Concept of Balanced Antennas with Load-Invariant Base Impedance Using a Two Element LC-Coupler. Peters, N., Schmitz, Th., Sadeghfam, A., Heuermann, H. JF - Proceedings of the European microwave association : journal of the European microwave association Y1 - 2005 SP - 117 EP - 122 PB - PLUS CY - Pisa ER - TY - JOUR A1 - Heuermann, Holger A1 - Lünebach, M. T1 - A Novel Dual-Mode-Design for Push-Push Oscillators with Improved Phase Noise Performance. Heuermann, Holger; Lünebach, M. JF - Conference proceedings : 3 - 7 October 2005, CNIT la Défense, Paris, France; [comprises the] 35th European Microwave Conference 2005 ; The European Conference on Wireless Technology 2005 ; European Radar Conference 2005 ; GAAS 2005, The European Gallium A. Vol. 1 Y1 - 2005 SN - 2-9600551-0-1 N1 - European Microwave Conference ; (35, 2005, Paris) ; European Microwave Week ; (2005, Paris) SP - 4 pp. PB - Horizon House Publ CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan A1 - Hillebrand, J. T1 - Vector-Signal-Generator with Two ¿¿-PLL's / Ibrahim, I. ; Hillebrand, J. ; Heuermann, H. JF - European Conference on Wireless Technologies, 2007. ECWT 2007 ; 8 - 10 October 2007 Munich, Germany Y1 - 2007 SN - 978-2-87487-003-3 SP - 1 EP - 4 ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan T1 - Improvements in the flicker noise reduction technique for osillator designs / Ibrahim, Irfan ; Heuermann, Holger JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - EuMC 2009 SP - 1215 EP - 1218 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Ibrahim, Irfan T1 - Novel theory and architecture of a vector signal generator implemented with two PLLs / Ibrahim, Irfan ; Heuermann, Holger JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 85 EP - 88 ER - TY - JOUR A1 - Heuermann, Holger A1 - Holtrup, Stephan T1 - Fundamentals and ignition of a microplasma at 2.45 GHZ / Holtrup, Stephan ; Heuermann, Holger JF - European Microwave Conference, 2009 : EuMC 2009 ; Sept. 29, 2009 - Oct. 1, 2009, Rome, Italy ; part of European Microwave Week (EuMW) / sponsored by EuMA, European Microwave Association ... Endorsed by IEEE Y1 - 2009 SN - 978-1-4244-4748-0 N1 - EuMC 2009 SP - 1607 EP - 1609 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger A1 - Hillebrand, Jürgen A1 - Sadeghfam, Arash T1 - Novel Concept of a Digital SigmaDelta-PLL-Phase-Shift-Modulator / Hillebrand, Jürgen ; Sadeghfam, Arash ; Heuermann, Holger Y1 - 2008 SN - 978-3-8007-3086-5 N1 - Microwave Conference (GeMIC), 2008 German SP - 123 EP - 126 ER - TY - JOUR A1 - Heuermann, Holger A1 - Harzheim, Thomas A1 - Cronenbroeck, Tobias T1 - First SIMO harmonic radar based on the SFCW concept and the HR transfer function JF - Remote sensing N2 - This paper presents a new SIMO radar system based on a harmonic radar (HR) stepped frequency continuous wave (SFCW) architecture. Simple tags that can be electronically individually activated and deactivated via a DC control voltage were developed and combined to form an MO array field. This HR operates in the entire 2.45 GHz ISM band for transmitting the illumination signal and receives at twice the stimulus frequency and bandwidth centered around 4.9 GHz. This paper presents the development, the basic theory of a HR system for the characterization of objects placed into the propagation path in-between the radar and the reflectors (similar to a free-space measurement with a network analyzer) as well as first measurements performed by the system. Further detailed measurement series will be made available later on to other researchers to develop AI and machine learning based signal processing routines or synthetic aperture radar algorithms for imaging, object recognition, and feature extraction. For this purpose, the necessary information is published in this paper. It is explained in detail why this SIMO-HR can be an attractive solution augmenting or replacing existing systems for radar measurements in production technology for material under test measurements and as a simplified MIMO system. The novel HR transfer function, which is a basis for researchers and developers for material characterization or imaging algorithms, is introduced and metrologically verified in a well traceable coaxial setup. KW - MUT measurement; scanner KW - transponder KW - SFCW KW - harmonic radar KW - nonlinear radar Y1 - 2021 U6 - https://doi.org/10.3390/rs13245088 SN - 2072-4292 N1 - This article belongs to the Special Issue "Nonlinear Junction Detection and Harmonic Radar" VL - 13 IS - 24 PB - MDPI CY - Basel ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Vergleich mehrerer Naeherungsverfahren zur Berechnung des Wellenwiderstandes von Mikrostreifenleitungen mit experimentellen Ergebnissen JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 39. 1996 (1996) Y1 - 1996 ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Direkte on-wafer-Messung des Wellenwiderstandes einer Mikrostreifenleitung JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 41. 1998 (1998) Y1 - 1998 ER - TY - JOUR A1 - Heuermann, Holger A1 - Graf, W. T1 - Direkte Messung der Dispersion des Wellenwiderstandes einer Mikrostreifenleitung JF - Kleinheubacher Berichte : Vorträge und Berichte der gemeinsamen Tagung des U.R.S.I.-Landesausschusses in der Bundesrepublik Deutschland / Hrsg.: Deutsche Telekom AG. 40. 1997 (1997) Y1 - 1997 ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, Holger T1 - Blocking structures for mixed-mode systems. / Erkens, Holger ; Heuermann, Holger JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association. Vol. 1 Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 297 EP - 300 PB - Horizon House Publ. CY - London ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - Novel RF switch concepts for differential wireless communications frontends. Erkens, H.; Heuermann, H. JF - IEEE Transactions on Microwave Theory and Techniques. 54 (2006), H. 6, Part 1 Y1 - 2006 SN - 0018-9480 SP - 2376 EP - 2382 ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - Mixed-Mode Chain Scattering Parameters: Theory and Verification JF - IEEE Transactions on Microwave Theory and Techniques N2 - Chain scattering parameters or T-parameters are a useful tool for calculating cascaded two-ports. With the increasing importance of mixed-mode S-parameters, a need for converting the T-parameters from their unbalanced form into a balanced form emerges for suiting both common and differential mode waves, as well as the mode conversion. This paper presents the derivation of the equations for transformations between mixed-mode S- and T-parameters for a mixed-mode two-port. Although derived in a way very similar to monomode T-parameters, no simplifications were necessary. Measurement results exemplify the quality of the T-parameter transformation under real-life conditions. Y1 - 2007 SN - 0018-9480 U6 - https://doi.org/10.1109/TMTT.2007.902587 VL - 55 IS - 8 SP - 1704 EP - 1708 PB - IEEE CY - New York ER - TY - JOUR A1 - Heuermann, Holger A1 - Erkens, H. T1 - EVM- und BER-optimierter differentieller Einseitenbandmodulator / Erkens, H., Heuermann, H. JF - German Microwave Conference - GeMiC 2005 - : conference proceedings ; University of Ulm, April 5 - 7, 2005 [Elektronische Ressource] / ed.: Wolfgang Menzel. IMA, VDE ... Y1 - 2005 SN - 3-00-015423-X N1 - German Microwave Conference <2005, Ulm> PB - Univ CY - Ulm ER - TY - JOUR A1 - Heuermann, Holger A1 - Emmrich, Thomas A1 - Bongartz, Simon T1 - Microwave spark plug to support ignitions with high compression ratios JF - IEEE Transactions on Plasma Science N2 - Upcoming gasoline engines should run with a larger number of fuels beginning from petrol over methanol up to gas by a wide range of compression ratios and a homogeneous charge. In this article, the microwave (MW) spark plug, based on a high-speed frequency hopping system, is introduced as a solution, which can support a nitrogen compression ratio up to 1:39 in a chamber and more. First, an overview of the high-speed frequency hopping MW ignition and operation system as well as the large number of applications are presented. Both gives an understanding of this new base technology for MW plasma generation. Focus of the theoretical part is the explanation of the internal construction of the spark plug, on the achievable of the high voltage generation as well as the high efficiency to hold the plasma. In detail, the development process starting with circuit simulations and ending with the numerical multiphysics field simulations is described. The concept is evaluated with a reference prototype covering the frequency range between 2.40 and 2.48 GHz and working over a large power range from 20 to 200 W. A larger number of different measurements starting by vector hot-S11 measurements and ending by combined working scenarios out of hot temperature, high pressure and charge motion are winding up the article. The limits for the successful pressure tests were given by the pressure chamber. Pressures ranged from 1 to 39 bar and charge motion up to 25 m/s as well as temperatures from 30◦ to 125◦. KW - Automotive application KW - ignition KW - microplasma KW - microwave (MW) plasma KW - plasma jet Y1 - 2022 U6 - https://doi.org/10.1109/TPS.2022.3183690 SN - 1939-9375 IS - Early Access SP - 1 EP - 6 PB - IEEE ER - TY - JOUR A1 - Heuermann, Holger A1 - Baumann, F.-M. A1 - Fauth, G. A1 - Albert, M. T1 - Results of Network Analyzer Measurements with Leakage Errors Corrected with the TMS-15-Term Procedure JF - On-Line Moisture Analysis of Raw Coal Y1 - 1994 N1 - 1993 International Symposium on On-Line Analysis of Coal : Vienna ; [proceedings]. SP - 1361 EP - 1364 ER - TY - JOUR A1 - Heuermann, Holger T1 - Sure Methods of On-Wafer Scattering Parameter Measurements with Self-Calibration Procedures Y1 - 1996 N1 - 46th ARFTG conference digest : November 30 - December 1. 1995, Safari Resort, Scottsdale, Arizona / Automatic RF Techniques Group. [Publ. chairman: Ed. Godshalk] SP - 136 EP - 145 ER - TY - JOUR A1 - Heuermann, Holger T1 - GSOLT: the calibration procedure for all multi-port vector network analyzers JF - IEEE MTT-S International Microwave Symposium digest : Philadelphia, Pennsylvania, 8 - 13 June 2003 ; [including: 2003 International Microwave Symposium digest, vol. 1-3, RF Integrated Circuit Symposium digest, Automatic RF Techniques Group Symposium digest . Vol. 3 Y1 - 2003 SN - 0-780-37696-X N1 - Nebent.: 2003 IEEE MTT-S International Microwave Symposium SP - 1815 EP - 1818 PB - IEEE CY - Piscataway, NJ ER - TY - JOUR A1 - Heuermann, Holger T1 - Microwave On-Wafer Measurements with Activ Needle Probe Tips Y1 - 1997 N1 - 47th ARFTG Conference digest : June 20 - 21, 1996, Moscone Convention Center, San Francisco, California / Automatic RF Techniques Group. [Publication chair: Ed Godshalk SP - 208 EP - 214 ER - TY - JOUR A1 - Heuermann, Holger T1 - Multiport S-parameter calculation from two-port network analyzer measurements with or without switch matrix JF - ARFTG Conference, 2006 67th, San Francisco, CA Y1 - 2006 SN - 978-0-7803-9529-9 SP - 219 EP - 222 ER - TY - JOUR A1 - Heuermann, Holger T1 - Verringerung des Phasenrauschens von Oszillatoren durch Dual-Mode-Resonatoren JF - HF-Report. 20 (2006), H. 5-6 Y1 - 2006 SN - 1431-827X SP - 43 EP - 48 ER - TY - JOUR A1 - Heuermann, Holger T1 - Praezise Streuparametermessungen sind der Schluessel zur Modellierung elektrischer Schaltungen JF - Neues von Rohde & Schwarz (1997) Y1 - 1997 SP - 22 EP - 23 ER - TY - JOUR A1 - Heuermann, Holger T1 - Fehlerkorrigierte Mehrtormessungen für frequenzumsetzende Komponenten mit NonLin-S JF - HF-Report : Hochfrequenztechnik, Optoelektronik, Mikrowellentechnik, Kommunikationstechnik. 22 (2008), H. 4 Y1 - 2008 SN - 1431-827X SP - 39 EP - 44 ER - TY - JOUR A1 - Heuermann, Holger T1 - A 14 W SPST Switch with Four PIN-Diodes In a 0402-SMD-Package Y1 - 2008 SN - 978-3-8007-3086-5 N1 - Microwave Conference (GeMIC), 2008 German SP - 318 EP - 321 ER - TY - JOUR A1 - Heuermann, Holger T1 - A Synthesis Technique for Mono- and Mixed-Mode Symmetrical Filter JF - Conference proceedings : Tuesday 12th, Wednesday 13th and Thursday 14th October, [RAI International Exhibition and Congress Centre, Amsterdam ; part of European Microwave Week 2004] / EuMA, European Microwave Association . Vol. 1 Y1 - 2004 SN - 1-580-53992-0 N1 - European Microwave Conference ; (34, 2004, Amsterdam) ; European Microwave Week ; (7, 2004, Amsterdam) SP - 309 EP - 312 PB - Horizon House Publ CY - London ER - TY - JOUR A1 - Heuermann, Holger T1 - Selbstkalibrierverfahren zur Systemfehlerkorrektur von Streuparametermessungen auf Halbleitersubstraten JF - Mikrowellen und Optronik : Kongreßunterlagen = Microwaves and optronics / MIOP '95, 8. Kongreßmesse für Hochfrequenztechnik, Messehalle Sindelfingen, 30. Mai - 1. Juni 1995. [Hrsg.: Network GmbH] Y1 - 1995 SN - 3-924651-45-0 N1 - MIOP ; (8, 1995, Sindelfingen) SP - 23 EP - 29 CY - Hagenburg ER - TY - JOUR A1 - Heuermann, Holger T1 - LZY: A Self-Calibration Approach in Competition to the LRM Method for On-Wafer Measurements Y1 - 1995 N1 - 45th ARFTG Conference digest, Spring 1995 : [conference topic: Testing and design of RFIC'S], May 19, 1995, Orange County Convention Center, Orlando, Florida / Automatic RF Techniques Group. Publications chairman: Ed Godshalk; ARFTG Conference digest ; 4 SP - 129 EP - 136 ER - TY - JOUR A1 - Heuermann, Holger T1 - Dual mode radio: A new tranceiver architecture for UWB and 60 GHz-applications JF - European Conference on Wireless Technology, 2008. EuWiT 2008. Y1 - 2008 SN - 978-2-87487-008-8 SP - 147 EP - 150 ER - TY - JOUR A1 - Heuermann, Holger T1 - Leerläufe als postulierte Kalibrierstandards fuer Messungen auf planaren Schaltungen JF - tm - Technisches Messen. 64. 1997 (1997), H. 6 Y1 - 1997 SP - 230 EP - 237 ER - TY - JOUR A1 - Heuermann, Holger T1 - Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements JF - IEEE Transactions on Microwave Theory and Techniques. 56 (2008), H. 11, 1 Y1 - 2008 SN - 0018-9480 SP - 2505 EP - 2510 ER - TY - JOUR A1 - Heuermann, Holger T1 - Calibration procedures with series impedances and unknown lines simplify on-wafer measurements JF - IEEE transactions on microwave theory and techniques : MTT ; a publication of the IEEE Microwave Theory and Techniques Society. 47 (1999), H. 1 Y1 - 1999 SN - 0018-9480 SP - 1 EP - 5 ER - TY - JOUR A1 - Herzwurm, Georg A1 - Krams, Benedikt A1 - Pietsch, Wolfram A1 - Schockert, Sixten T1 - Report from the 3rd international workshop on requirements prioritization for customer oriented software development (RePriCo’12) JF - ACM SIGSOFT Software Engineering Notes N2 - Prioritization is an essential task within requirements engineering to cope with complexity and to establish focus properly. The 3rd Workshop on Requirements Prioritization for customer oriented Software Development (RePriCo’12) focused on requirements prioritization and adjacent themes in the context of customer oriented development of bespoke and standard software. Five submissions have been accepted for the proceedings and for presentation. The report summarizes and points out key findings. KW - Requirements relations KW - Discourse ethics KW - Tool support KW - Consensus KW - Requirements prioritization Y1 - 2012 U6 - https://doi.org/10.1145/2237796.2237817 SN - 0163-5948 VL - 37 IS - 4 SP - 32 EP - 34 PB - Association for Computing Machinery CY - New York ER - TY - JOUR A1 - Herzwurm, Georg A1 - Fehlmann, Thomas A1 - Pietsch, Wolfram A1 - Schockert, Sixten T1 - Der Qualität ein Haus. Best-Practice-Analyse des Quality Function Deployments JF - Qualität und Zuverlässigkeit : QZ Y1 - 2011 SN - 0720-1214 VL - 56 IS - 8 SP - 23 EP - 27 PB - Hanser CY - München ER - TY - JOUR A1 - Herzog, Hans A1 - Pietrzyk, Uwe A1 - Shah, N. Jon A1 - Ziemons, Karl T1 - The current state, challenges and perspectives of MR-PET JF - Neuroimage N2 - Following the success of PET/CT during the last decade and the recent increasing proliferation of SPECT/CT, another hybrid imaging instrument has been gaining more and more interest: MR-PET. First combined, simultaneous PET and MR studies carried out in small animals demonstrated the feasibility of the new approach. Concurrently, some prototypes of an MR-PET scanner for simultaneous human brain studies have been built, their performance is being tested and preliminary applications have already been shown. Through this pioneering work, it has become clear that advances in the detector design are necessary for further optimization. Recently, the different issues related to the present state and future prospects of MR-PET were presented and discussed during an international 2-day workshop at the Forschungszentrum Jülich, Germany, held after, and in conjunction with, the 2008 IEEE Nuclear Science Symposium and Medical Imaging Conference in Dresden, Germany on October 27–28, 2008. The topics ranged from small animal MR-PET imaging to human MR-BrainPET imaging, new detector developments, challenges/opportunities for ultra-high field MR-PET imaging and considerations of possible future research and clinical applications. This report presents a critical summary of the contributions made to the workshop. Y1 - 2010 U6 - https://doi.org/10.1016/j.neuroimage.2009.10.036 SN - 1053-8119 VL - 49 IS - 3 SP - 2072 EP - 2082 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Herssens, Nolan A1 - Cowburn, James A1 - Albracht, Kirsten A1 - Braunstein, Bjoern A1 - Cazzola, Dario A1 - Colyer, Steffi A1 - Minetti, Alberto E. A1 - Pavei, Gaspare A1 - Rittweger, Jörn A1 - Weber, Tobias A1 - Green, David A. ED - Cattaneo, Luigi T1 - Movement in low gravity environments (MoLo) programme – the MoLo-L.O.O.P. study protocol JF - PLOS ONE / Public Library of Science N2 - Exposure to prolonged periods in microgravity is associated with deconditioning of the musculoskeletal system due to chronic changes in mechanical stimulation. Given astronauts will operate on the Lunar surface for extended periods of time, it is critical to quantify both external (e.g., ground reaction forces) and internal (e.g., joint reaction forces) loads of relevant movements performed during Lunar missions. Such knowledge is key to predict musculoskeletal deconditioning and determine appropriate exercise countermeasures associated with extended exposure to hypogravity. Y1 - 2022 U6 - https://doi.org/10.1371/journal.pone.0278051 SN - 1932-6203 VL - 17 IS - 11 PB - Plos CY - San Francisco ER - TY - JOUR A1 - Herrmann, Ulf A1 - Schwarzenbart, Marc A1 - Dittmann-Gabriel, Sören A1 - May, Martin T1 - Hochtemperatur-Wärmespeicher für die Strom- und Wärmewende JF - Solarzeitalter : Politik, Kultur und Ökonomie erneuerbarer Energien Y1 - 2019 SN - 0937-3802 VL - 31 IS - 2 SP - 18 EP - 23 ER - TY - JOUR A1 - Herrmann, Ulf A1 - Schwarzenbart, Marc A1 - Dittmann-Gabriel, Sören T1 - Speicher statt Kohle. Integration thermischer Stromspeicher in vorhandene Kraftwerksstandorte JF - BWK : Das Energie-Fachmagazin Y1 - 2019 SN - 1436-4883 VL - 71 IS - 4 SP - 42 EP - 45 PB - Springer-VDI-Verl. CY - Düsseldorf ER - TY - JOUR A1 - Herrmann, Ulf A1 - Nava, P. T1 - Die Strahlung der Sonne einfangen JF - DLR-Nachrichten / Deutsches Zentrum für Luft- und Raumfahrt Y1 - 2005 SN - 0937-0420 VL - 109 IS - Sonderheft Solarforschung SP - 34 EP - 37 ER - TY - JOUR A1 - Herrmann, Ulf A1 - Lippke, F. T1 - The influence of transients on the design of DSG solar fields JF - Journal de Physique IV : proceedings Y1 - 1999 SN - 2-86883-402-7 U6 - https://doi.org/10.1051/jp4:1999377 SN - 1764-7177 (Online) SN - 1155-4339 (Print) VL - 9 IS - PR3 SP - 489 EP - 494 ER - TY - JOUR A1 - Herrmann, Ulf A1 - Kelly, Bruce A1 - Price, Henry T1 - Two Tank Molten Salt Storage for Parabolic Trough Solar Power Plants JF - Energy : the international journal Y1 - 2002 U6 - https://doi.org/10.1016/S0360-5442(03)00193-2 SN - 0360-5442 N1 - SolarPACES 2002, Zürich, Switzerland, 4–6 September 2002 VL - 29 IS - 5-6 (Special Issue SolarPaces) SP - 883 EP - 893 ER - TY - JOUR A1 - Herrmann, Ulf A1 - Kearney, David W. T1 - Survey of Thermal Energy Storage for Parabolic Trough Power Plants JF - Journal of Solar Energy Engineering Y1 - 2002 U6 - https://doi.org/10.1115/1.1467601 SN - 1528-8986 (Online) SN - 0199-6231 (Print) VL - 124 IS - 2 SP - 145 EP - 152 ER - TY - JOUR A1 - Herold, Marco J. A1 - Brandt, Jens van den A1 - Seibler, Jost A1 - Reichardt, Holger M. T1 - Inducible and reversible gene silencing by stable integration of an shRNA-encoding lentivirus in transgenic rats JF - Proceedings of the National Academy of Sciences of the United States of America Y1 - 2008 U6 - https://doi.org/10.1073/pnas.0806213105 SN - 1091-6490 VL - 105 IS - 47 SP - 18507 EP - 18512 ER - TY - JOUR A1 - Herber, R. A1 - Ernst, S. A1 - Buß, G. A1 - Schöning, Michael Josef A1 - Baltruschat, H. T1 - Detection of hydrocarbons in air and water by adsorption on Pt electrodes using continuous impedance measurements JF - Proceedings of the Symposium on New Directions in Electroanalytical Chemistry II : [held at the 195th Meeting of the Electrochemical Society in Seattle, Washington on May 3 and 4, 1999] / Physical Electrochemistry, Sensor, and Organic and Biological Electrochemistry Divisions. Ed.: J. Leddy, P. Vanysek, M.D. Porter Y1 - 1999 SN - 1-56677-227-3 N1 - Symposium on New Directions in Electroanalytical Chemistry ; (2, 1999, Seattle, Wash.) SP - 168 EP - 177 PB - Electrochemical Society CY - Pennington, NJ ER - TY - JOUR A1 - Heptner, K. A1 - Wollert, Jörg T1 - FML-Report - VDI-Richtlinie 4485 'E-Commerce und Logistik' JF - Logistik für Unternehmen : das Fachmagazin der internen und externen Logistik Y1 - 2005 SN - 0930-7834 N1 - Printausg. in der Bibliothek vorhanden: 43 Z 513 VL - 19 SP - 58 EP - 59 ER - TY - JOUR A1 - Hentschke, Reinhard A1 - Hager, Jonathan A1 - Hojdis, Nils T1 - Molecular Modeling Approach to the Prediction of Mechanical Properties of Silica-Reinforced Rubbers JF - Journal of Applied Polymer Science N2 - Recently, we have suggested a nanomechanical model for dissipative loss in filled elastomer networks in the context of the Payne effect. The mechanism is based on a total interfiller particle force exhibiting an intermittent loop, due to the combination of short-range repulsion and dispersion forces with a long-range elastic attraction. The sum of these forces leads, under external strain, to a spontaneous instability of “bonds” between the aggregates in a filler network and attendant energy dissipation. Here, we use molecular dynamics simulations to obtain chemically realistic forces between surface modified silica particles. The latter are combined with the above model to estimate the loss modulus and the low strain storage modulus in elastomers containing the aforementioned filler-compatibilizer systems. The model is compared to experimental dynamic moduli of silica filled rubbers. We find good agreement between the model predictions and the experiments as function of the compatibilizer's molecular structure and its bulk concentration. KW - theory and modeling KW - supramolecular structures KW - rubber KW - mechanical properties KW - elastomers Y1 - 2014 U6 - https://doi.org/10.1002/app.40806 SN - 1097-4628 VL - 131 IS - 18 SP - 1 EP - 9 PB - Wiley CY - New York, NY ER - TY - JOUR A1 - Henriques, A. A1 - Jurado, B. A1 - Grieser, M. A1 - Denis-Petit, D. A1 - Chiron, T. A1 - Gaudefroy, L. A1 - Glorius, J. A1 - Langer, Christoph A1 - Litvinov, Yu. A. A1 - Mathieu, L. A1 - Meot, V. A1 - Perez-Sanchez, R. A1 - Pibernat, J. A1 - Reifarth, R. A1 - Roig, O. A1 - Thomas, B. A1 - Thomas, B. A. A1 - Thomas, J. C. A1 - Tsekhanovich, I. T1 - Indirect measurements of neutron cross-secti at heavy-ion storage rings JF - Journal of Physics: Conference Series N2 - Cross sections for neutron-induced reactions of short-lived nuclei are essential for nuclear astrophysics since these reactions in the stars are responsible for the production of most heavy elements in the universe. These reactions are also key in applied domains like energy production and medicine. Nevertheless, neutron-induced cross-section measurements can be extremely challenging or even impossible to perform due to the radioactivity of the targets involved. Indirect measurements through the surrogate-reaction method can help to overcome these difficulties. The surrogate-reaction method relies on the use of an alternative reaction that will lead to the formation of the same excited nucleus as in the neutron-induced reaction of interest. The decay probabilities (for fission, neutron and gamma-ray emission) of the nucleus produced via the surrogate reaction allow one to constrain models and the prediction of the desired neutron cross sections. We propose to perform surrogate reaction measurements in inverse kinematics at heavy-ion storage rings, in particular at the CRYRING@ESR of the GSI/FAIR facility. We present the conceptual idea of the most promising setup to measure for the first time simultaneously the fission, neutron and gamma-ray emission probabilities. The results of the first simulations considering the 238U(d,d') reaction are shown, as well as new technical developments that are being carried out towards this set-up. Y1 - 2020 U6 - https://doi.org/10.1088/1742-6596/1668/1/012019 VL - 1668 IS - Art. 012019 PB - IOP CY - Bristol ER - TY - JOUR A1 - Hennes, Philipp A1 - Laumann, Jörg T1 - Ansatz der Drehbehinderung aus Koppelpfetten mit dünnwandigen kaltgeformten Z-Profilen JF - Stahlbau Y1 - 2021 U6 - https://doi.org/10.1002/stab.202000104 SN - 1437-1049 VL - 90 IS - 3 SP - 158 EP - 168 PB - Ernst & Sohn CY - Berlin ER - TY - JOUR A1 - Hennemann, Jörg A1 - Kohl, Claus-Dieter A1 - Reisert, Steffen A1 - Kirchner, Patrick A1 - Schöning, Michael Josef T1 - Copper oxide nanofibres for detection of hydrogen peroxide vapour at high concentrations JF - physica status solidi (a) N2 - We present a sensor concept based on copper(II)oxide (CuO) nanofibres for the detection of hydrogen peroxide (H2O2) vapour in the percent per volume (% v/v) range. The fibres were produced by using the electrospinning technique. To avoid water condensation in the pores, the fibres were initially modified by an exposure to H2S to get an enclosed surface. By a thermal treatment at 350 °C the fibres were oxidised back to CuO. Thereby, the visible pores disappear which was verified by SEM analysis. The fibres show a decrease of resistance with increasing H2O2 concentration which is due to the fact that hydrogen peroxide is an oxidising gas and CuO a p-type semiconductor. The sensor shows a change of resistance within the minute range to the exposure until the maximum concentration of 6.9% v/v H2O2. At operating temperatures below 450 °C the corresponding sensor response to a concentration of 4.1% v/v increases. The sensor shows a good reproducibility of the signal at different measurements. CuO seems to be a suitable candidate for the detection of H2O2 vapour at high concentrations. Resistance behaviour of the sensor under exposure to H2O2 vapours between 2.3 and 6.9% v/v at an operating temperature of 450 °C. Y1 - 2013 U6 - https://doi.org/10.1002/pssa.201200775 SN - 1862-6319 VL - 210 IS - 5 SP - 859 EP - 863 PB - Wiley CY - Weinheim ER - TY - JOUR A1 - Hennecke, Klaus A1 - Schwarzbözl, Peter A1 - Hoffschmidt, Bernhard A1 - Göttsche, Joachim A1 - Koll, G. A1 - Beuter, M. A1 - Hartz, T. T1 - The solar power tower Jülich – a solar thermal power plant for test and demonstration of air receiver JF - Solar energy and human settlement : Elektronische Ressource : proceedings of ISES world congress 2007 ; (Vol. I - Vol. V) / [ISES Solar World Congress. ISES, International Solar Energy Society]. D. Yogi Goswami ; Yuwen Zhao Y1 - 2007 SN - 978-7-302-16146-2 N1 - Solar World Congress <2007, Beijing> ; International Solar Energy Society SP - 1749 EP - 1753 PB - Tsinghua Univ. Press CY - Beijing ER - TY - JOUR A1 - Henn, Gudrun A1 - Polaczek, Christa T1 - Studienerfolg in den Ingenieurwissenschaften JF - Das Hochschulwesen : HSW ; Forum für Hochschulforschung, -praxis und -politik Y1 - 2007 SN - 0018-2974 VL - 55 IS - 5 SP - 144 EP - 147 ER - TY - JOUR A1 - Henken, F. E. A1 - Oosterhuis, K. A1 - Öhlschläger, Peter A1 - Bosch, L. A1 - Hooijberg, E. A1 - Haanen, J. B. A. G. A1 - Steenbergen, R. D. M. T1 - Preclinical safety evaluation of DNA vaccines encoding modified HPV16 E6 and E7 JF - Vaccine N2 - Persistent infection with high-risk human papillomaviruses (hrHPV) can result in the formation of anogenital cancers. As hrHPV proteins E6 and E7 are required for cancer initiation and maintenance, they are ideal targets for immunotherapeutic interventions. Previously, we have described the development of DNA vaccines for the induction of HPV16 E6 and E7 specific T cell immunity. These vaccines consist of ‘gene-shuffled’ (SH) versions of HPV16 E6 and E7 that were fused to Tetanus Toxin Fragment C domain 1 (TTFC) and were named TTFC-E6SH and TTFC-E7SH. Gene-shuffling was performed to avoid the risk of inducing malignant transformation at the vaccination site. Here, we describe the preclinical safety evaluation of these candidate vaccines by analysis of their transforming capacity in vitro using established murine fibroblasts (NIH 3T3 cells) and primary human foreskin keratinocytes (HFKs). We demonstrate that neither ectopic expression of TTFC-E6SH and TTFC-E7SH alone or in combination enabled NIH 3T3 cells to form colonies in soft agar. In contrast, expression of HPV16 E6WT and E7WT alone or in combination resulted in effective transformation. Similarly, retroviral transduction of HFKs from three independent donors with both TTFC-E6SH and TTFC-E7SH alone or in combination did not show any signs of immortalization. In contrast, the combined expression of E6WT and E7WT induced immortalization in HFKs from all donors. Based on these results we consider it justified to proceed to clinical evaluation of DNA vaccines encoding TTFC-E6SH and TTFC-E7SH in patients with HPV16 associated (pre)malignancies. Y1 - 2012 U6 - https://doi.org/10.1016/j.vaccine.2012.04.013 SN - 0264-410X VL - 30 IS - 28 SP - 4259 EP - 4266 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Hengsbach, Jan-Niklas A1 - Engel, Mareike A1 - Cwienczek, Marcel A1 - Stiefelmaier, Judith A1 - Tippkötter, Nils A1 - Ulber, Roland T1 - Scalable unseparated bioelectrochemical reactors by using a carbon fiber brush as stirrer and working electrode JF - ChemElectroChem N2 - The concept of energy conversion into platform chemicals using bioelectrochemical systems (BES) has gained increasing attention in recent years, as the technology simultaneously provides an opportunity for sustainable chemical production and tackles the challenge of Power-to-X technologies. There are many approaches to realize the industrial scale of BES. One concept is to equip standard bioreactors with static electrodes. However, large installations resulted in a negative influence on various reactor parameters. In this study, we present a new single-chamber BES based on a stirred tank reactor in which the stirrer was replaced by a carbon fiber brush, performing the functions of the working electrode and the stirrer. The reactor is characterized in abiotic studies and electro-fermentations with Clostridium acetobutylicum. Compared to standard reactors an increase in butanol production of 20.14±3.66 % shows that the new BES can be efficiently used for bioelectrochemical processes. Y1 - 2023 U6 - https://doi.org/10.1002/celc.202300440 SN - 2196-0216 VL - 10 IS - 21 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Henderson, Colin J. A1 - Scheer, Nico A1 - Wolf, C. Roland T1 - Advances in the generation of mouse models to elucidate the pathways of drug metabolism in rodents and man JF - Expert Review of Clinical Pharmacology Y1 - 2009 U6 - https://doi.org/10.1586/17512433.2.2.105 SN - 1751-2441 VL - 2 IS - 2 SP - 105 EP - 109 PB - Taylor & Francis CY - London ER - TY - JOUR A1 - Henderson, Colin J. A1 - Mclaughlin, Lesley A. A1 - Scheer, Nico A1 - Stanley, Lesley A. A1 - Wolf, C. Roland T1 - Cytochrome b5 Is a Major Determinant of Human Cytochrome P450 CYP2D6 and CYP3A4 Activity In Vivo s JF - Molecular Pharmacology Y1 - 2015 U6 - https://doi.org/10.1124/mol.114.097394 SN - 1521-0111 VL - 87 IS - 4 SP - 733 EP - 739 PB - ASPET CY - Bethesda ER - TY - JOUR A1 - Hemmerling, H.-J. A1 - Merschenz-Quack, Angelika A1 - Wunderlich, H. T1 - Crystal structures of indeno[1,2-d]imidazoles. XIth European Crystallographic Meeting, Vienna 1988 JF - Zeitschrift für Kristallographie - Crystalline Materials Y1 - 1988 SN - 2196-7105 (E-Books); 2194-4946 (Print) VL - 185 IS - H. 1-4 SP - 256 ER - TY - JOUR A1 - Helsper, Christoph A1 - Wiedensohler, A. A1 - Weise, W. A1 - Lütkemeier, E. T1 - Determination of the Bipolar Charge Equilibrium in Pure Gases / Wiedensohler, A. ; Weise, W. ; Helsper, C. ; Lütkemeier, E. JF - Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft für Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR) Y1 - 1986 N1 - International Aerosol Conference ; (2, 1986, Berlin (West)) SP - 383 EP - 386 PB - Pergamon Press CY - Oxford [u.a.] ER - TY - JOUR A1 - Helsper, Christoph A1 - Wiedensohler, A. A1 - Lütkemeier, E. A1 - Feldpausch, M. T1 - Investigation on the Bipolar Charge Distribution at Various Gas Conditions / Wiedensohler, A.; Lütkemeier, E.; Feldpausch, M. ; Helsper, C. JF - Journal of Aerosol Science. 17 (1986), H. 3 Y1 - 1986 SN - 0021-8502 SP - 413 EP - 416 ER - TY - JOUR A1 - Helsper, Christoph A1 - Nießner, R. A1 - Rönicke, G. T1 - Application of a Multistep Condensation Nuclei Counter as a Detector for Particle Surface Composition / Nießner, R.; Helsper, C.; Rönicke, G. JF - Aerosols : science, technology, and industr. applications of airborne particles ; proceedings of the 1. Internat. Aerosol Conference held Sept. 17-21, 1984, Minneapolis, Minn., U.S.A / ed.: Benjamin Y. H. Liu Y1 - 1984 SN - 0444009477 N1 - International Aerosol Conference ; (1, 1984, Minneapolis, Minn.) SP - 63 EP - 66 PB - Elsevier CY - New York [u.a.] ER - TY - JOUR A1 - Helsper, Christoph A1 - Nießner, R. T1 - Application of a Multistep Condensation Nuclei Counter as a Detector for Particle Surface Composition / Nießner, R. ; Helsper, C. JF - Journal of Aerosol Science. 16 (1985), H. 3 Y1 - 1985 SN - 0021-8502 SP - 201 EP - 209 ER - TY - JOUR A1 - Helsper, Christoph A1 - Nießner, R. T1 - On the Influence of the Vapour Substance on the Behaviour of an Expansion Type Condensation Nucleus Counter JF - Journal of Aerosol Science. 16 (1985), H. 5 Y1 - 1985 SN - 0021-8502 SP - 457 EP - 461 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Willemer, W. T1 - Fast and Automated Testing of Filter Media / Mölter, W. ; Helsper, C. ; Willemer, W. JF - FILTECH Conference 1987 : Utrecht, Holland; September 23 - 25 1987 / org. by the Filtration Society , Vol. 1. Y1 - 1987 N1 - Filtech Conference ; (1987, Utrecht) SP - 106 EP - 112 PB - Filtration Society CY - Loughborough ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Mölter, L. T1 - Korngrößenanalyseverfahren für trockene Pulver und Stäube von 0,5-25 µm JF - Chemie-Technik. 16 (1986) Y1 - 1986 SN - 0340-9961 SP - 140 EP - 144 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Löffler, F. A1 - Wadenpohl, C. T1 - Investigations on a New Aerosol Generator for the Production of Carbon Aggregate Particles / Helsper, C. ; Mölter, W. ; Löffler, F. ; Wadenpohl, C. ; Kaufmann, S. ; Wenninger, G. JF - Atmospheric Environment. Part A. General Topics. 27 A (1993), H. 8 Y1 - 1993 SN - 1352-2310 SP - 1271 EP - 1275 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Kaminski, S. T1 - Fast and Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S. JF - 1. Europäisches Symposium Partikelabscheidung aus Gasen : [PARTEC, Nürnberg, West Germany, 19. - 21. April 1989 ; preprints] = 1. European Symposium Separation of Particles from Gases / [Organisation und Durchführung: NürnbergMesse]. Hrsg. von: Friedrich Löffler Y1 - 1989 N1 - Europäisches Symposion Partikelabscheidung aus Gasen <1, 1989, Nürnberg> SP - 441 EP - 457 PB - NürnbergMesse CY - Nürnberg ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Kaminski, S. T1 - Fast and Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S. JF - Proceedings of the Filtech Conference, Karlsruhe 1989, Vol. 1 Y1 - 1989 SP - 125 EP - 136 PB - Filtration Society CY - Oadby ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Kaminski, S. T1 - Automatisierter Test von Luftfiltermedien für Hochleistungsschwebstoffilter und Entstaubungsfilter / Mölter, W. ; Helsper, C. ; Kaminski, S. JF - Staub, Reinhaltung der Luft. 50 (1990) Y1 - 1990 SN - 0039-0771 SP - 311 EP - 317 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Kaminski, S. T1 - Fast, Automated Testing of Different Air Filter Media / Mölter, W. ; Helsper, C. ; Kaminski, S. JF - Filtration and Separation. 29 (1992), H. 1 Y1 - 1992 SN - 0015-1882 SP - 45 EP - 50 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. A1 - Haller, P. T1 - Representative Dilution of Aerosols by a Factor of 10,000 JF - Journal of Aerosol Science. 21 (1990), H. Suppl. 1 Y1 - 1990 SN - 0021-8502 SP - 637 EP - 640 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. T1 - Determination and Neutralization of the Charge Produced by the Dispersion of Powders JF - Journal of Aerosol Science. 18 (1987), H. 6 Y1 - 1987 SN - 0021-8502 SP - 877 EP - 880 ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, W. T1 - Characteristics of a Nebulizer with Cyclone Preseparator / Mölter, W. ; Helsper, C. JF - Aerosols, their generation, behaviour and applications. Annual Conference of the Aerosol Society / Aerosol Society (UK) ; 5. Y1 - 1991 SP - 89 EP - 94 CY - Loughborough ER - TY - JOUR A1 - Helsper, Christoph A1 - Mölter, L. T1 - Erzeugung von Prüfaerosolen für die Kalibrierung von optischen Partikelmeßverfahren nach VDI 3491 JF - Technisches Messen. 56 (1989) Y1 - 1989 SN - 0171-8096 N1 - in der Bereichsbibliothek Jülich vorhanden: 63 ZS 008-1989 SP - 229 EP - 234 ER - TY - JOUR A1 - Helsper, Christoph A1 - Lütkemeier, E. A1 - Wiedensohler, A. T1 - Charge Distribution by Unipolar Charging of Small Aerosol Particles / Lütkemeier, E. ; Helsper, C. ; Wiedensohler, A. JF - Aerosols : formation and reactivity ; proceedings of the second International Aerosol Conference, 22-26 Sept. 1986, Berlin (West) / Gesellschaft für Aerosolforschung (GAeF) ; American Association for Aerosol Research (AAAR) Y1 - 1986 N1 - International Aerosol Conference ; (2, 1986, Berlin (West)) SP - 474 EP - 478 PB - Pergamon Press CY - Oxford [u.a.] ER - TY - JOUR A1 - Helsper, Christoph A1 - Horn, Hans-Georg A1 - Schneider, Friedhelm A1 - Wehner, Birgit T1 - Intercomparison of five mobility size spectrometers for measuring atmospheric submicrometer aerosol particles / Helsper, Christoph ; Horn, Hans-Georg ; Schneider, Friedhelm ; Wehner, Birgit ; Wiedensohler, Alfred JF - Gefahrstoffe, Reinhaltung der Luft. Air Quality Control. 68 (2008), H. 11-12 Y1 - 2008 SN - 0949-8036 SP - 475 EP - 481 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Thielen, H. J. T1 - Determination of Particle Size Distributions by Means of an Electrostatic Classifier / Fißan, H. J.; Helsper, C. ; Thielen, H. J. JF - Journal of Aerosol Science. 14 (1983), H. 3 Y1 - 1983 SN - 0021-8502 SP - 354 EP - 357 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Muggli, J. A1 - Scheidweiler, A. T1 - Verification of Ionization Chamber Theory JF - Fire Technology. 19 (1983), H. 1 Y1 - 1983 SN - 1572-8099 SP - 14 EP - 21 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Muggli, J. A1 - Scheidweiler, A. T1 - Particle Number Distributions of Aerosols from Test Fires JF - Journal of Aerosol Science. 11 (1980), H. 5-6 Y1 - 1980 SN - 0021-8502 SP - 439 EP - 446 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Kasper, W. T1 - Kalibrierung der Partikelgrößenbestimmung von optischen Partikelzählern / Fißan, H. J.; Helsper, C. ; Kasper, W. JF - 3. Europäisches Symposion Partikelmeßtechnik : [PARTEC, eine Veranstaltung der Reihe Partikel-Technologie Nürnberg ; Nürnberg, 9. - 11. Mai 1984 ; preprints] = 3. European Symposium on Particle Characterization / Veranst.: GVC, Gesellschaft Verfahrenstechnik und Chemieingenieurwesen im Verein Deutscher Ingenieure (VDI). Red. Bearb.: Kurt Leschonski Y1 - 1984 N1 - Europäisches Symposion Partikelmesstechnik <3, 1984, Nürnberg> ; PARTEC <1984, Nürnberg> SP - 263 EP - 274 PB - NMA Nürnberger Messe- und Ausstellungsges. CY - Nürnberg ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Kasper, W. T1 - Calibration of Optical Particle Counters with Respect to Particle Size / Fißan, H. J. ; Helsper, C.; Kasper, W. JF - Particle and Particle Systems Characterization. 1 (1984), H. 1984 Y1 - 1984 SN - 1521-4117 SP - 108 EP - 111 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Kapadi, A. A1 - Liu, B. Y. H. T1 - Data Inversion by Simplex Minimization for the Electrical Aerosol Analyzer JF - Aerosol Science and Technology. 1 (1982), H. 1982 Y1 - 1982 SN - 0278-6826 SP - 136 EP - 146 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. A1 - Franzen, H. T1 - Bestimmung der Größenverteilung von Aerosolen aus Verbrennungsvorgängen mit einem elektrostatischen Aerosolanalysator JF - Aerosole in Naturwissenschaft, Medizin und Technik : Bericht der Tagung der Gesellschaft für Aerosolforschung e.V. 4, 1976 Y1 - 1976 SP - 118 EP - 126 ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. T1 - Calibration of the Polytec HC-15 and HC-70 Optical Particle Counters / Fißan, H. J. ; Helsper, C. JF - Aerosols in the mining and industrial work environments, Vol. 3. Instrumentation, Marple, Virgil A. ; Liu, Benjamin Y. Y1 - 1983 N1 - International Symposium on Aerosols in the Mining and Industrial Work Environment ; (1981.11.01-06 : ; Minneapolis/Minn.) SP - 825 EP - 829 PB - Ann Arbor Science CY - Ann Arbor, Mich. ER - TY - JOUR A1 - Helsper, Christoph A1 - Fißan, H. J. T1 - Numerical Simulation Studies and Data Reduction for Size Classifying Measurement Techniques / Fißan, H. J.; Helsper, C. JF - Aerosols in science, medicine and technology : conference / Gesellschaft für Aerosolforschung 7. 1979. Y1 - 1979 SP - 199 EP - 205 ER -