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  - Klocke, Martina
A1  - Spur, G.
T1  - Keramografische Untersuchungen an Edelkorundschleifscheiben / Spur, G. ; Klocke, M.
JF  - Jahrbuch Schleifen, Honen, Läppen und Polieren. 53. Ausgab (1985)
Y1  - 1985
SN  - 0172-245X
SP  - 255
EP  - 267
ER  - 
TY  - JOUR
A1  - Klocke, Martina
A1  - Richert, Vera
A1  - Sube, Maike
T1  - Vier Jahre „Guter Studienstart im Ingenieurbereich“: Entwicklung und Perspektiven des „Nullten Semesters“ in Aachen
JF  - Zeitschrift für Beratung und Studium
N2  - Bereits 2015 wurde in der Zeitschrift „Qualität in der Wissenschaft“ (QiW) über das Kooperationsprojekt „Guter Studienstart im Ingenieurbereich“, das Orientierungssemester von RWTH und FH Aachen, berichtet. In diesem Artikel legen wir den Schwerpunkt auf die Entwicklung des Projekts in den Jahren 2015 bis 2018 und geben eine Rückschau sowie einen Ausblick auf die Entwicklungsperspektiven nach dem offiziellen Projektende.
Y1  - 2018
SN  - 1860-3068
VL  - 13
IS  - 1
SP  - 17
EP  - 22
PB  - Universitätsverlag Webler
CY  - Bielefeld
ER  - 
TY  - JOUR
A1  - Klocke, Martina
A1  - Lenk, Antje
T1  - Innovationstransfer auf der Basis von Akzeptanz und Zusammenarbeit / Lenk, Antje ; Klocke, Martina
JF  - Berufsbildung in Wissenschaft und Praxis. BWP. 22 (1993), H. 5
Y1  - 1993
SN  - 0341-4515
SP  - 43
EP  - 45
ER  - 
TY  - JOUR
A1  - Klocke, Martina
A1  - Lenk, A.
T1  - Hilfe zur Selbsthilfe
JF  - Lernfeld Betrieb (1993)
Y1  - 1993
SN  - 0930-4460
SP  - 26
EP  - 27
ER  - 
TY  - JOUR
A1  - Klocke, Martina
A1  - Jochimsen, P.
T1  - Fachhochschulen sind leistungsorientierte Partner der Wirtschaft / Jochimsen, P. ; Klocke, M.
JF  - Zwischen Ostsee und Nordsee : Wirtschaft im Bezirk der IHK zu Kiel / hrsg. in Zu-sammenarbeit mit der Industrie- und Handelskammer zu Kiel. Red.: Wolf-Rüdiger Janzen. 3., völlig neue Ausg.
Y1  - 1996
SN  - 388363140X
SP  - 66
EP  - 69
PB  - Verl. Kommunikation und Wirtschaft
CY  - Oldenburg
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Lernfabrik - externer Ort für Personalentwicklung?
JF  - Lean-Management : Potentiale und Erfolge ; mit den Referaten zur 19. Deutschen Industrial-Engeneering-Fachtagung am 2. und 3. Dezember 1993 und weiteren Beiträgen zum angewandten Industrial engineering / REFA-IE
Y1  - 1993
N1  - Deutsche Industrial-Engineering-Fachtagung, <19, 1993, Darmstadt> Deutsches IE-Jahrbuch 1993
SP  - 6/1
EP  - 6/15
CY  - Darmstadt
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Entwicklung von modularen Lerneinheiten in der CIM-orientierten Lernfabrik
JF  - CIM, Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben : [Bericht über den EUROTECNET-Workshop "CIM - Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben" vom 16. bis 17. Oktober 1991 in Elmshorn (BR Deutschland)] / [Bericht erstattet von Martina Klocke]
Y1  - 1992
N1  - Workshop "CIM - Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben" <1991, Elmshorn>
SP  - 49
EP  - 60
PB  - EUROTECNET
CY  - Brüssel
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Neue Technologien - eine Herausforderung für Klein- und Mittelbetriebe
JF  - CIM, Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben : [Bericht über den EUROTECNET-Workshop "CIM - Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben" vom 16. bis 17. Oktober 1991 in Elmshorn (BR Deutschland)] / [Bericht erstattet von Martina Klocke]
Y1  - 1992
N1  - Workshop "CIM - Bedeutung für die Weiterbildung in Klein- und Mittelbetrieben" <1991, Elmshorn>
SP  - 6
EP  - 8
PB  - EUROTECNET
CY  - Brüssel
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Die Situation von Ingenieurinnen in Europa - ein Ländervergleich
JF  - Berufsziel: Ingenieurin : Aufbruch in die/der Technik / hrsg. von Renate Kosuch
Y1  - 1996
SN  - 3-89271-645-5
SP  - 26
EP  - 38
PB  - Deutscher Studien-Verl.
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Ingenieurinnen dringend gesucht
JF  - Von der Dampfmaschine zur Brennstoffzelle : 100 Jahre Ingenieurausbildung in Kiel / [Hrsg. Fachhochschule Kiel. Red. Martina Klocke]
Y1  - 2003
SP  - 52
EP  - 55
PB  - Fachhochschule
CY  - Kiel
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Wärmebehandlungsanlagen / Voelmy, M.
JF  - Zeitschrift für wirtschaftliche Fertigung : ZwF. 78 (1983), H. 6
Y1  - 1983
SN  - 0044-3743
N1  - Voelmy, Martina = Geburtsname von Frau Prof. Dr.-Ing. Martina Klocke.
SP  - 293
EP  - 300
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Entwicklung der Feinbearbeitung am Institut für Werkzeugmaschinen und Fertigungstechnik der Technischen Universität Berlin / Klocke, M.; Klocke, F. ; Stark, C.
JF  - Zeitschrift für wirtschaftliche Fertigung: ZwF. 83 (1988), H. 10
Y1  - 1988
SN  - 0044-3743
SP  - 521
EP  - 529
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Die Situation von Ingenieurinnen in Europa - ein Ländervergleich
JF  - Neue Impulse (1995)
Y1  - 1995
SN  - 0943-4240
SP  - 7
EP  - 16
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Angebotsstrukturen und Kosten bzw. Wirtschaftlichkeit von Bildungsangeboten
JF  - Entwicklung und Umsetzung regionaler Qualifizierungsstrategien : Reader zum Workshop am 21.02.1994 in Berlin / Hrsg.: Bundesinstitut für Berufsbildung. Christel Alt ... (Hrsg.)
Y1  - 1995
SN  - 3-7639-0531-6
N1  - Bundesinstitut für Berufsbildung <Berlin; Bonn> Tagungen und Expertengespräche zur beruflichen Bildung ; 24
SP  - 37
EP  - 40
PB  - Bertelsmann
CY  - Bielefeld
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Lernfabrik - externer Ort für Personalentwicklung
JF  - Entwicklung und Umsetzung regionaler Qualifizierungsstrategien : Reader zum Workshop am 21.02.1994 in Berlin / Hrsg.: Bundesinstitut für Berufsbildung. Christel Alt ... (Hrsg.)
Y1  - 1995
SN  - 3-7639-0531-6
N1  - Bundesinstitut für Berufsbildung <Berlin; Bonn> Tagungen und Expertengespräche zur beruflichen Bildung ; 24 ; in der Vorlage fälschlicherweise: Marina Klocke
SP  - 89
EP  - 94
PB  - Bertelsmann
CY  - Bielefeld
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Study Units in the CIM-Oriented Study Factory
JF  - Qualification for Computer-Integrated Manufacturing. Hrsg.: Felix Rauner
Y1  - 1995
SN  - 3-540-19971-3
SP  - 38
EP  - 51
PB  - Springer
CY  - Berlin [u.a.]
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - Kiel – eine Fachhochschule macht Stadtteilarbeit
Y1  - 2000
N1  - http://www.zukunft-der-regionen.de (aufgerufen am 17.07.2006)
CY  - Kiel
ER  - 
TY  - JOUR
A1  - Klocke, Martina
T1  - CNC-Technik holt auf bei der Feinbearbeitung / Voelmy, M.
JF  - VDI-Nachrichten (1981)
Y1  - 1981
N1  - vom 18.12.1981. Voelmy, Martina = Geburtsname von Frau Prof. Dr.-Ing. Martina Klocke
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  - Klettke, Tanja
A1  - Homburg, Carsten
A1  - Gell, Sebastian
T1  - How to measure analyst forecast effort
JF  - European Accounting Review
N2  - We introduce a new way to measure the forecast effort that analysts devote to their earnings forecasts by measuring the analyst's general effort for all covered firms. While the commonly applied effort measure is based on analyst behaviour for one firm, our measure considers analyst behaviour for all covered firms. Our general effort measure captures additional information about analyst effort and thus can identify accurate forecasts. We emphasise the importance of investigating analyst behaviour in a larger context and argue that analysts who generally devote substantial forecast effort are also likely to devote substantial effort to a specific firm, even if this effort might not be captured by a firm-specific measure. Empirical results reveal that analysts who devote higher general forecast effort issue more accurate forecasts. Additional investigations show that analysts' career prospects improve with higher general forecast effort. Our measure improves on existing methods as it has higher explanatory power regarding differences in forecast accuracy than the commonly applied effort measure. Additionally, it can address research questions that cannot be examined with a firm-specific measure. It provides a simple but comprehensive way to identify accurate analysts.
Y1  - 2015
U6  - https://doi.org/10.1080/09638180.2014.909291
SN  - 0963-8180
VL  - 24
IS  - 1
SP  - 129
EP  - 146
PB  - Taylor & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Kleines, H.
A1  - Ziemons, Karl
A1  - Zwoll, K.
T1  - Experiences with ATM in a multivendor pilot system at Forschungszentrum Jülich
JF  - IEEE Transactions on Nuclear Science
N2  - The ATM technology for high speed serial transmission provides a new quality of communication by introducing novel features in a LAN environment, especially support of real time communication, of both LAN and WAN communication and of multimedia streams. In order to evaluate ATM for future DAQ systems and remote control systems as well as for a high speed picture archiving and communications system for medical images, Forschungszentrum Julich has build up a pilot system for the evaluation of ATM and standard low cost multimedia systems. It is a heterogeneous multivendor system containing a variety of switches and desktop solutions, employing different protocol options of ATM. The tests conducted in the pilot system revealed major difficulties regarding stability, interoperability and performance. The paper presents motivations, layout and results of the pilot system. Discussion of results concentrates on performance issues relevant for realistic applications, e.g., connection to a RAID system via NFS over ATM
Y1  - 1998
SN  - 0018-9499
VL  - 45
IS  - 4
SP  - 1867
EP  - 1871
ER  - 
TY  - JOUR
A1  - Kleines, H.
A1  - Erki, I.
A1  - Ziemons, Karl
A1  - Zwoll, K.
ED  - Lehmann, Thomas
T1  - ATM- und Multimedia Pilotsystem im Rahmen des Projektes M-FIBRe Aufbau und Erfahrungen
JF  - Bildverarbeitung für die Medizin : Algorithmen - Systeme - Anwendungen
Y1  - 1997
SN  - 3-86073-519-5
N1  - Proceedings des Aachener Workshops am 8. u. 9. November 1996 ; PP_001 Posterpräsentation
SP  - 241
EP  - 248
PB  - Verl. der. Augustinus-Buchh.
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Klein, Michel
A1  - Butenweg, Christoph
A1  - Klinkel, Sven
T1  - The Influence of Soil-Structure-Interaction on the Fatigue Analysis in the Foundation Design of Onshore Wind Turbines
JF  - Procedia Engineering
Y1  - 2017
U6  - https://doi.org/10.1016/j.proeng.2017.09.325
SN  - 1877-7058
VL  - 199
SP  - 3218
EP  - 3223
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kleefeld, Andreas
A1  - Zimmermann, M.
ED  - Constanda, Christian
ED  - Bodmann, Bardo E.J.
ED  - Harris, Paul J.
T1  - Computing Elastic Interior Transmission Eigenvalues
JF  - Integral Methods in Science and Engineering
N2  - An alternative method is presented to numerically compute interior elastic transmission eigenvalues for various domains in two dimensions. This is achieved by discretizing the resulting system of boundary integral equations in combination with a nonlinear eigenvalue solver. Numerical results are given to show that this new approach can provide better results than the finite element method when dealing with general domains.
Y1  - 2022
SN  - 978-3-031-07171-3
U6  - https://doi.org/10.1007/978-3-031-07171-3_10
N1  - Corresponding author: Andreas Kleefeld
SP  - 139
EP  - 155
PB  - Birkhäuser
CY  - Cham
ER  - 
TY  - JOUR
A1  - Kleefeld, Andreas
A1  - Reißel, Martin
T1  - The Levenberg–Marquardt method applied to a parameter estimation problem arising from electrical resistivity tomography
JF  - Applied Mathematics and Computation
Y1  - 2011
SN  - 0096-3003
VL  - 217
IS  - 9
SP  - 4490
EP  - 4501
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kleefeld, Andreas
A1  - Pieronek, J.
T1  - Elastic transmission eigenvalues and their computation via the method of fundamental solutions
JF  - Applicable Analysis
N2  - A stabilized version of the fundamental solution method to catch ill-conditioning effects is investigated with focus on the computation of complex-valued elastic interior transmission eigenvalues in two dimensions for homogeneous and isotropic media. Its algorithm can be implemented very shortly and adopts to many similar partial differential equation-based eigenproblems as long as the underlying fundamental solution function can be easily generated. We develop a corroborative approximation analysis which also implicates new basic results for transmission eigenfunctions and present some numerical examples which together prove successful feasibility of our eigenvalue recovery approach.
KW  - elastic scattering
KW  - method of fundamental solutions
KW  - Interior transmission eigenvalues
Y1  - 2020
U6  - https://doi.org/10.1080/00036811.2020.1721473
SN  - 1563-504X
VL  - 100
IS  - 16
SP  - 3445
EP  - 3462
PB  - Taylore & Francis
CY  - London
ER  - 
TY  - JOUR
A1  - Kleefeld, Andreas
T1  - The hot spots conjecture can be false: some numerical examples
JF  - Advances in Computational Mathematics
N2  - The hot spots conjecture is only known to be true for special geometries. This paper shows numerically that the hot spots conjecture can fail to be true for easy to construct bounded domains with one hole. The underlying eigenvalue problem for the Laplace equation with Neumann boundary condition is solved with boundary integral equations yielding a non-linear eigenvalue problem. Its discretization via the boundary element collocation method in combination with the algorithm by Beyn yields highly accurate results both for the first non-zero eigenvalue and its corresponding eigenfunction which is due to superconvergence. Additionally, it can be shown numerically that the ratio between the maximal/minimal value inside the domain and its maximal/minimal value on the boundary can be larger than 1 + 10− 3. Finally, numerical examples for easy to construct domains with up to five holes are provided which fail the hot spots conjecture as well.
KW  - Numerics
KW  - Boundary integral equations
KW  - Potential theory
KW  - Helmholtz equation
KW  - Interior Neumann eigenvalues
Y1  - 2021
U6  - https://doi.org/10.1007/s10444-021-09911-5
SN  - 1019-7168
VL  - 47
PB  - Springer
CY  - Dordrecht
ER  - 
TY  - JOUR
A1  - Kirstein, Simon
A1  - Müller, Karsten
A1  - Walecki-Mingers, Mark
A1  - Deserno, Thomas M.
T1  - Robust adaptive flow line detection in sewer pipes
JF  - Automation in construction
N2  - As part of a novel approach to automatic sewer inspection, this paper presents a robust algorithm for automatic flow line detection. A large image repository is obtained from about 50,000 m sewers to represent the high variability of real world sewer systems. Automatic image processing combines Canny edge detection, Hough transform for straight lines and cost minimization using Dijkstra's shortest path algorithm. Assuming that flow lines are mostly smoothly connected horizontal structures, piecewise flow line delineation is reduced to a process of selecting adjacent line candidates. Costs are derived from the gap between adjacent candidates and their reliability. A single parameter α enables simple control of the algorithm. The detected flow line may precisely follow the segmented edges (α = 0.0) or minimize gaps at joints (α = 1.0). Both, manual and ground truth-based analysis indicate that α = 0.8 is optimal and independent of the sewer's material. The algorithm forms an essential step to further automation of sewer inspection.
Y1  - 2012
U6  - https://doi.org/10.1016/j.autcon.2011.05.009
SN  - 1872-7891 (E-Journal) ; 0926-5805 (Print)
IS  - 21
SP  - 24
EP  - 31
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kirschner-Hermanns, Ruth
A1  - Klementz, T.
A1  - Haselhuhn, Angelika
A1  - Jakse, Gerhard
A1  - Heidenreich, A.
A1  - Brehmer, Bernhard
T1  - Drangsymptomatik nach onkologisch erfolgreicher Prostatakarzinomtherapie : prospektive Studie zum Einfluss von Therapiemodalität, Morbidität und epidemiologischen Faktoren auf die Lebensqualität
JF  - Der Urologe
Y1  - 2011
SN  - 1433-0563
VL  - Vol. 50
IS  - Iss. 11
SP  - 1412
EP  - 1419
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kirschkamp, T.
A1  - Jöckel, M.
A1  - Wählisch, Georg
A1  - Barry, J. C.
T1  - Konstruktion eines Modellauges zur Simulation von Purkinje-Spiegelbildern für die Bestimmung der Krümmungsradien und der Lage der Augenlinse
JF  - Biomedizinische Technik = Biomedical Engineering
Y1  - 1998
SN  - 1862-278X (E-Journal); 0013-5585 (Print)
N1  - Printausg. in der Bibliothek vorhanden: 63 Z 471-1998/99
VL  - Bd. 43
IS  - H. 11
SP  - 318
EP  - 325
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
A1  - Piazzi, Lukas
T1  - Numerical investigation of the effectiveness of a bored pile wall for the minimisation of settlement resulting from tunnel driving
T1  - Numerische Untersuchung der Wirkungsweise einer Bohrpfahlwand zur Minimierung der Setzungen infolge Tunnel
JF  - Geomechanics and tunnelling
Y1  - 2009
U6  - https://doi.org/10.1002/geot.200900063
SN  - 1865-7362
VL  - Vol. 2
IS  - Iss. 6
SP  - 753
EP  - 765
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
A1  - Kolymbas, Dimitrios
T1  - Theoretische Untersuchung zur Ortsbruststabilität
JF  - Bautechnik : Zeitschrift für den gesamten Ingenieurbau
Y1  - 2005
U6  - https://doi.org/10.1002/bate.200590151
SN  - 1437-0999 (E-Journal); 0005-6820 (Print); 0932-8351 (Print)
N1  - Gedruckt in der Bibliothek Bayernallee vorhanden: 13 Z 177-2005
VL  - Bd. 82
IS  - H. 7
SP  - 449
EP  - 456
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
T1  - Experimental investigation of the face stability of shallow tunnels in sand
JF  - Acta Geotechnica
N2  - Various models have been proposed for the prediction of the necessary support pressure at the face of a shallow tunnel. To assess their quality, the collapse of a tunnel face was modelled with small-scale model tests at single gravity. The development of the failure mechanism and the support force at the face in dry sand were investigated. The observed displacement patterns show a negligible influence of overburden on the extent and evolution of the failure zone. The latter is significantly influenced, though, by the initial density of the sand: in dense sand a chimney-wedge-type collapse mechanism developed, which propagated towards the soil surface. Initially, loose sand did not show any discrete collapse mechanism. The necessary support force was neither influenced by the overburden nor the initial density. A comparison with quantitative predictions by several theoretical models showed that the measured necessary support pressure is overestimated by most of the models. Those by Vermeer/Ruse and Léca/Dormieux showed the best agreement to the measurements.
Y1  - 2010
U6  - https://doi.org/10.1007/s11440-010-0110-7
SN  - 1861-1125
VL  - 5
IS  - 1
SP  - 43
EP  - 62
PB  - Springer
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kirsch, Ansgar
T1  - Experimentelle Untersuchung des Ortsbrustversagens seichter Tunnel
JF  - Österreichische Bauwirtschaft
Y1  - 2008
IS  - Sondernr.
SP  - 6
EP  - 9
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Spelthahn, H.
A1  - Schöning, Michael Josef
A1  - Henkel, H.
A1  - Schneider, A.
A1  - Friedrich, P.
A1  - Kolstad, J.
A1  - Berger, J.
T1  - Realisierung eines Polyimid-basierten kalorimetrischen Gassensors zur Inline-Überwachung der H2O2-Konzentration in aseptischen Abfüllanlagen
JF  - Sensoren und Messsysteme 2010 [Elektronische Ressource] : Vorträge der 15. ITG/GMA-Fachtagung vom 18. bis 19. Mai 2010 in Nürnberg / Informationstechnische Gesellschaft im VDE (ITG); VDI/VDE-Gesellschaft Mess- und Automatisierungstechnik (GMA)
Y1  - 2010
SN  - 978-3-8007-3260-9
N1  - Fachtagung Sensoren und Messsysteme 15, 2010, Nürnberg ; Gesellschaft Mess- und Automatisierungstechnik
SP  - 607
EP  - 612
PB  - VDE Verlag
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Reisert, Steffen
A1  - Pütz, Patrick
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Characterisation of polymeric materials as passivation layer for calorimetric H2O2 gas sensors
JF  - Physica Status Solidi (a)
N2  - Calorimetric gas sensors for monitoring the H₂O₂ concentration at elevated temperatures in industrial sterilisation processes have been presented in previous works. These sensors are built up in form of a differential set-up of a catalytically active and passive temperature-sensitive structure. Although, various types of catalytically active dispersions have been studied, the passivation layer has to be established and therefore, chemically as well as physically characterised. In the present work, fluorinated ethylene propylene (FEP), perfluoralkoxy (PFA) and epoxy-based SU-8 photoresist as temperature-stable polymeric materials have been investigated for sensor passivation in terms of their chemical inertness against H₂O₂, their hygroscopic properties as well as their morphology. The polymeric materials were deposited via spin-coating on the temperature-sensitive structure, wherein spin-coated FEP and PFA show slight agglomerates. However, they possess a low absorption of humidity due to their hydrophobic surface, whereas the SU-8 layer has a closed surface but shows a slightly higher absorption of water. All of them were inert against gaseous H₂O₂ during the characterisation in H₂O₂ atmosphere that demonstrates their suitability as passivation layer for calorimetric H₂O₂ gas sensors.
Y1  - 2012
U6  - https://doi.org/10.1002/pssa.201100773
SN  - 1862-6319
VL  - 209
IS  - 5
SP  - 859
EP  - 863
PB  - Wiley-VCH
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Oberländer, Jan
A1  - Suso, Henri-Pierre
A1  - Rysstad, Gunnar
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Towards a wireless sensor system for real-time H2O2 monitoring in aseptic food processes
JF  - Physica status solidi (a)
N2  - A wireless sensor system based on the industrial ZigBee standard for low-rate wireless networking was developed that enables real-time monitoring of gaseous H2O2 during the package sterilization in aseptic food processes. The sensor system consists of a remote unit connected to a calorimetric gas sensor, which was already established in former works, and an external base unit connected to a laptop computer. The remote unit was built up by an XBee radio frequency (RF) module for data communication and a programmable system-on-chip controller to read out the sensor signal and process the sensor data, whereas the base unit is a second XBee RF module. For the rapid H2O2 detection on various locations inside the package that has to be sterilized, a novel read-out strategy of the calorimetric gas sensor was established, wherein the sensor response is measured within the short sterilization time and correlated with the present H2O2 concentration. In an exemplary measurement application in an aseptic filling machinery, the suitability of the new, wireless sensor system was demonstrated, wherein the influence of the gas velocity on the H2O2 distribution inside a package was determined and verified with microbiological tests.
KW  - calorimetric gas sensor;hydrogen peroxide;wireless sensor system
Y1  - 2013
U6  - https://doi.org/10.1002/pssa.201200920
SN  - 1862-6319
VL  - 210
IS  - 5
SP  - 877
EP  - 883
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Oberländer, Jan
A1  - Suco, Henri-Pierre
A1  - Rysstad, Gunnar
A1  - Schöning, Michael Josef
T1  - Monitoring the microbicidal effectiveness of gaseous hydrogen peroxide in sterilisation processes by means of a calorimetric gas sensor
JF  - Food control
N2  - In the present work, a novel method for monitoring sterilisation processes with gaseous H2O2 in combination with heat activation by means of a specially designed calorimetric gas sensor was evaluated. Therefore, the sterilisation process was extensively studied by using test specimens inoculated with Bacillus atrophaeus spores in order to identify the most influencing process factors on its microbicidal effectiveness. Besides the contact time of the test specimens with gaseous H2O2 varied between 0.2 and 0.5 s, the present H2O2 concentration in a range from 0 to 8% v/v (volume percent) had a strong influence on the microbicidal effectiveness, whereas the change of the vaporiser temperature, gas flow and humidity were almost negligible. Furthermore, a calorimetric H2O2 gas sensor was characterised in the sterilisation process with gaseous H2O2 in a wide range of parameter settings, wherein the measurement signal has shown a linear response against the H2O2 concentration with a sensitivity of 4.75 °C/(% v/v). In a final step, a correlation model by matching the measurement signal of the gas sensor with the microbial inactivation kinetics was established that demonstrates its suitability as an efficient method for validating the microbicidal effectiveness of sterilisation processes with gaseous H2O2.
KW  - hydrogen peroxide
KW  - sterilisation
KW  - Bacillus atrophaeus
KW  - calorimetric gas sensor
Y1  - 2012
U6  - https://doi.org/10.1016/j.foodcont.2012.11.048
SN  - 0956-7135
VL  - 31
IS  - 2
SP  - 530
EP  - 538
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Oberländer, Jan
A1  - Friedrich, Peter
A1  - Rysstad, G.
A1  - Berger, J.
A1  - Keusgen, M.
A1  - Schöning, Michael Josef
T1  - Realization of a calorimetric gas sensor on polyimide foil for applications in aseptic food industry
JF  - Procedia Engineering. 5 (2010)
Y1  - 2010
SN  - 1877-7058
N1  - Eurosensor XXIV Conference
SP  - 264
EP  - 267
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Oberländer, Jan
A1  - Friedrich, Peter
A1  - Berger, Jörg
A1  - Suso, Henri-Pierre
A1  - Kupyna, Andriy
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Optimisation and fabrication of a calorimetric gas sensor built up on a polyimide substrate for H2O2 monitoring
JF  - Physica status solidi (a) : applications and material science. 208 (2011), H. 6
Y1  - 2011
SN  - 1862-6319
SP  - 1235
EP  - 1240
PB  - Wiley
CY  - Weinheim
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Oberländer, Jan
A1  - Friedrich, Peter
A1  - Berger, Jörg
A1  - Rysstad, Gunnar
A1  - Schöning, Michael Josef
A1  - Keusgen, Michael
T1  - Realisation of a calorimetric gas sensor on polyimide foil for applications in aseptic food industry
JF  - Sensors and Actuators B: Chemical
N2  - A calorimetric gas sensor is presented for the monitoring of vapour-phase H2O2 at elevated temperature during sterilisation processes in aseptic food industry. The sensor was built up on a flexible polyimide foil (thickness: 25 μm) that has been chosen due to its thermal stability and low thermal conductivity. The sensor set-up consists of two temperature-sensitive platinum thin-film resistances passivated by a layer of SU-8 photo resist and catalytically activated by manganese(IV) oxide. Instead of an active heating structure, the calorimetric sensor utilises the elevated temperature of the evaporated H2O2 aerosol. In an experimental test rig, the sensor has shown a sensitivity of 4.78 °C/(%, v/v) in a H2O2 concentration range of 0%, v/v to 8%, v/v. Furthermore, the sensor possesses the same, unchanged sensor signal even at varied medium temperatures between 210 °C and 270 °C of the gas stream. At flow rates of the gas stream from 8 m3/h to 12 m3/h, the sensor has shown only a slightly reduced sensitivity at a low flow rate of 8 m3/h. The sensor characterisation demonstrates the suitability of the calorimetric gas sensor for monitoring the efficiency of industrial sterilisation processes.
KW  - Sterilisation process
KW  - Hydrogen peroxide
KW  - Polyimide
KW  - Calorimetric gas sensor
Y1  - 2012
U6  - https://doi.org/10.1016/j.snb.2011.01.032
SN  - 0925-4005
N1  - Part of special issue "Eurosensors XXIV, 2010"
VL  - 170
SP  - 60
EP  - 66
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Li, Bin
A1  - Spelthahn, Heiko
A1  - Henkel, Hartmut
A1  - Schneider, Andreas
A1  - Friedrich, Peter
A1  - Kolstad, Jens
A1  - Keusgen, Michael
A1  - Schöning, Michael Josef
T1  - Thin-film calorimetric H2O2 gas sensor for the validation of germicidal effectivity in aseptic filling processes
JF  - Sensors and Actuators B: Chemical. 154 (2011), H. 2
Y1  - 2011
SN  - 1873-3077
N1  - EUROSENSORS XXIII
SP  - 257
EP  - 263
PB  - Elsevier
CY  - Amsterdam
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Li, B.
A1  - Spelthahn, H.
A1  - Henkel, H.
A1  - Schneider, A.
A1  - Kolstad, J.
A1  - Friedrich, P.
A1  - Schöning, Michael Josef
T1  - Realisierung eines miniaturisierten Gassensors in Chiptechnologie basierend auf einer Dünnschicht-Thermosäule zur H2O2-Detektion in aseptischen Abfüllanlagen
JF  - 9. Dresdner Sensor-Symposium : Dresden, 07.-09. Dezember 2009 / Gerlach, Gerald ; Hauptmann, Peter [Hrsg.]
Y1  - 2009
SN  - 978-3-941298-44-6
N1  - Dresdner Sensor-Symposium ; (9, 2009, Dresden)
SP  - 293
EP  - 296
PB  - TUDpress
CY  - Dresden
ER  - 
TY  - JOUR
A1  - Kirchner, Patrick
A1  - Li, B.
A1  - Spelthahn, H.
A1  - Henkel, H.
A1  - Friedrich, P.
A1  - Kolstad, J.
A1  - Keusgen, M.
A1  - Schöning, Michael Josef
T1  - Thin-film calorimetric H2O2 gas sensor for the validation of germicidal effectivity in aseptic filling processes
JF  - Procedia Chemistry. 1 (2009), H. 1
Y1  - 2009
SN  - 1876-6196
N1  - Proceedings of the Eurosensors XXIII conference ; Eurosensors 23
SP  - 983
EP  - 986
ER  - 
TY  - JOUR
A1  - Kirchhof, Michael
A1  - Kraft, Bodo
T1  - Hybrides Vorgehensmodell : Agile und klassische Methoden im Projekt passend kombinieren
JF  - ProjektMagazin
N2  - Agil ist im Trend und immer mehr Unternehmen, die ihre Projekte bisher nach klassischen Prinzipien durchführten, denken über den Einsatz agiler Methoden nach. Doch selbst wenn die Organisation bereits beide Philosophien unterstützt, gilt für ein Projekt meist die klare Vorgabe: agil oder klassisch. Es gibt aber noch einen anderen Ansatz, mit diesen "unterschiedlichen Welten" umzugehen: Und zwar die beiden Philosophien innerhalb eines Projekts zu kombinieren. Wie dies in der Praxis aussehen und gelingen kann, zeigen Dr. Michael Kirchhof und Prof. Dr. Bodo Kraft in diesem Beitrag.
Y1  - 2012
IS  - 11
SP  - 11 S.
PB  - Berleb Media
CY  - Taufkirchen
ER  - 
TY  - JOUR
A1  - Kindmann, Rolf
A1  - Kraus, Matthias
A1  - Laumann, Jörg
A1  - Vette, Jan
T1  - Verallgemeinerte Berechnungsmethode für in Beton eingespannte Stahlprofile – Einspanntiefen, Tragfähigkeitsnachweise und Bemessungshilfen
JF  - Stahlbau
N2  - Stützen und Träger aus Stahlprofilen können in Fundamente oder Wände aus Stahlbeton einbetoniert werden. Diese Anschlüsse wirken in der Regel wie Einspannungen, die eine ausreichende Einspanntiefe erfordern. Im Folgenden wird eine verallgemeinerte Berechnungsmethode für in Stahlbetonkonstruktionen eingespannte Stahlprofile aus gewalzten I-Profilen, geschweißten I-Profilen, runden Hohlprofilen, eckigen Hohlprofilen und einzelligen Kastenquerschnitten vorgestellt. Für Beanspruchungen infolge einachsiger Biegung um die starke und schwache Profilachse werden der profilabhängige Ansatz der Betondruckspannungen im Einspannbereich und die Ermittlung der Einspanntiefe behandelt. Unter Berücksichtigung der Normalkraft werden an den maßgebenden Stellen Tragfähigkeitsnachweise für die Stahlprofile geführt. Als Ergänzung zu den Berechnungsformeln werden Bemessungshilfen zur Verfügung gestellt, die die Wahl der mitwirkenden Breiten und der Einspanntiefen erleichtert.
KW  - Stahlprofile
KW  - Anschlüsse an Stahlbeton
KW  - Einspanntiefen
KW  - Eingespannte Stützen und Träger
KW  - steel profiles
Y1  - 2022
U6  - https://doi.org/10.1002/stab.202200024
SN  - 1437-1049
VL  - 93
IS  - Early View
SP  - 1
EP  - 25
PB  - Ernst & Sohn GmbH
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Kilic, S. A.
A1  - Raatschen, Hans-Jürgen
A1  - Körfgen, B.
A1  - Apaydin, N. M.
A1  - Astaneh-Asl, A.
T1  - FE Model of the Fatih Sultan Mehmet Suspension Bridge Using Thin Shell Finite Elements
JF  - Arabian Journal for Science and Engineering
N2  - This paper presents the results of an eigenvalue analysis of the Fatih Sultan Mehmet Bridge. A high-resolution finite element model was created directly from the available design documents. All physical properties of the structural components were included in detail, so no calibration to the measured data was necessary. The deck and towers were modeled with shell elements. A nonlinear static analysis was performed before the eigenvalue calculation. The calculated natural frequencies and corresponding mode shapes showed good agreement with the available measured ambient vibration data. The calculation of the effective modal mass showed that nine modes had single contributions higher than 5 % of the total mass. They were in a frequency range up to 1.2 Hz. The comparison of the results for the torsional modes especially demonstrated the advantage of using thin shell finite elements over the beam modeling approach.
KW  - Suspension bridge
KW  - 3D nonlinear finite element model
KW  - Thin shell finite elements
KW  - Natural frequency
KW  - Effective modal mass
Y1  - 2017
U6  - https://doi.org/10.1007/s13369-016-2316-y
SN  - 2191-4281
VL  - 42
IS  - 3
SP  - 1103
EP  - 1116
PB  - Springer Nature
ER  - 
TY  - JOUR
A1  - Khodaverdi, M.
A1  - Weber, S.
A1  - Streun, M.
A1  - Parl, C.
A1  - Ziemons, Karl
T1  - High resolution imaging with ClearPET™ Neuro - first animal images
JF  - 2005 IEEE Nuclear Science Symposium Conference Record, Vol. 3
N2  - The ClearPET™ Neuro is the first full ring scanner within the Crystal Clear Collaboration (CCC). It consists of 80 detector modules allocated to 20 cassettes. LSO and LuYAP:Ce crystals in phoswich configuration in combination with position sensitive photomultiplier tubes are used to achieve high sensitivity and realize the acquisition of the depth of interaction (DOI) information. The complete system has been tested concerning the mechanical and electronical stability and interplay. Moreover, suitable corrections have been implemented into the reconstruction procedure to ensure high image quality. We present first results which show the successful operation of the ClearPET™ Neuro for artefact free and high resolution small animal imaging. Based on these results during the past few months the ClearPET™ Neuro System has been modified in order to optimize the performance.
Y1  - 2006
SN  - 1082-3654
SP  - 1641
EP  - 1644
ER  -