@inproceedings{GligorevicPulini2010, author = {Gligorevic, Snjezana and Pulini, Paola}, title = {Simplified airport surface channel model based on the WSSUS assumption}, series = {2010 Integrated Communications, Navigation and Surveillance Conference (ICNS 2010) : Herndon, Virginia, USA, 11 - 13 May 2010}, booktitle = {2010 Integrated Communications, Navigation and Surveillance Conference (ICNS 2010) : Herndon, Virginia, USA, 11 - 13 May 2010}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-7457-8}, issn = {2155-4943}, pages = {F2-1 -- F2-11}, year = {2010}, language = {en} } @inproceedings{DetertGligorevicHaaketal.2003, author = {Detert, T. and Gligorevic, Snjezana and Haak, W. and Sorger, Ulrich}, title = {Maximum-likelihood channel estimation using the spreading matrix in fast time-variant frequency selective channels}, series = {Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003 : 14 - 17 December 2003, Darmstadt, Germany}, booktitle = {Proceedings of the 3rd IEEE International Symposium on Signal Processing and Information Technology, ISSPIT 2003 : 14 - 17 December 2003, Darmstadt, Germany}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {0-7803-8292-7}, pages = {347 -- 350}, year = {2003}, language = {en} } @inproceedings{BrandesGligorevicSchnelletal.2007, author = {Brandes, Sinja and Gligorevic, Snjezana and Schnell, Michael and Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schlereth, Armin and Rihacek, Christoph}, title = {Final assessment of the B-VHF overlay concept}, series = {IEEE Aerospace Conference : 3-10 March 2007, Big Sky, Mont.}, booktitle = {IEEE Aerospace Conference : 3-10 March 2007, Big Sky, Mont.}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {1-4244-0525-4}, pages = {1 -- 18}, year = {2007}, language = {en} } @inproceedings{Gligorevic2002, author = {Gligorevic, Snjezana}, title = {Joint channel estimation and equalization for fast time-variant multipath channels}, series = {Proceedings / 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications : PIMRC 2002 : Lisboa, Portugal, September 15 - 18, 2002}, booktitle = {Proceedings / 13th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications : PIMRC 2002 : Lisboa, Portugal, September 15 - 18, 2002}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {0-7803-7589-0}, pages = {1127 -- 1130}, year = {2002}, language = {en} } @inproceedings{SajatovicRihacekHaindletal.2007, author = {Sajatovic, Miodrag and Rihacek, Christoph and Haindl, Bernhard and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana}, title = {Broadband VHF (B-VHF) project achievements and follow-on activities}, series = {Integrated Communications, Navigation and Surveillance Conference : Herndon, VA, 1 - 3 May 2007}, booktitle = {Integrated Communications, Navigation and Surveillance Conference : Herndon, VA, 1 - 3 May 2007}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {1-4244-1216-1}, pages = {1 -- 8}, year = {2007}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC a system for future broadband aeronautical multi-carrier communications in the L-BAND}, series = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, booktitle = {IEEE/AIAA 26th Digital Avionics Systems Conference ; DASC '07 ; 21 - 25 Oct. 2007, Dallas, Texas}, organization = {Institute of Electrical and Electronics Engineers}, isbn = {978-1-4244-1108-5}, pages = {4D2-1 -- 4D2-13}, year = {2007}, language = {en} } @inproceedings{HadinejadMahramGligorevicRitscher2002, author = {Hadinejad-Mahram, Hafez and Gligorevic, Snjezana and Ritscher, Matthias}, title = {Joint iterative channel estimation and parallel interference cancellation for coded DS-CDMA}, series = {Proceeding of the International Conference on Telecommunications 2002 : [Beijing, 23 - 26 June 2002]. Vol. 2}, booktitle = {Proceeding of the International Conference on Telecommunications 2002 : [Beijing, 23 - 26 June 2002]. Vol. 2}, organization = {Institute of Electrical and Electronics Engineers}, pages = {566 -- 570}, year = {2002}, language = {en} } @inproceedings{GligorevicBottSorger2004, author = {Gligorevic, Snjezana and Bott, Rainer and Sorger, Ulrich}, title = {Equalization for multi-carrier systems in time-varying channels}, series = {Multi-carrier spread-spectrum for future generation wireless systems : fourth international workshop, Germany, September 17-19, 2003}, booktitle = {Multi-carrier spread-spectrum for future generation wireless systems : fourth international workshop, Germany, September 17-19, 2003}, editor = {Fazel, Khaled}, isbn = {1402018371}, pages = {251 -- 258}, year = {2004}, language = {en} } @article{Gligorevic2008, author = {Gligorevic, Snjezana}, title = {Joint channel estimation and equalisation of fast time-varying frequency-selective channels}, series = {European transactions on telecommunications}, volume = {Vol. 19}, journal = {European transactions on telecommunications}, number = {Iss. 1}, issn = {1541-8251; 2161-3915; 1120-3862; 1124-318X}, pages = {1 -- 13}, year = {2008}, language = {en} } @inproceedings{RokitanskyEhammerGraeupletal.2007, author = {Rokitansky, Carl-Herbert and Ehammer, Max and Gr{\"a}upl, Thomas and Schnell, Michael and Brandes, Sinja and Gligorevic, Snjezana and Rihacek, Christoph and Sajatovic, Miodrag}, title = {B-AMC - Aeronautical Broadband Communication in the L-Band}, series = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, booktitle = {First CEAS European Air and Space Conference : Motto: century perspectives : Deutscher Luft-und Raumfahrtkongress 2007 : 10-13 September 2007 in Berlin, Germany. (Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2007 ; Bd. 1-5. - Enth.: Jahrbuch der Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt 2006 ; Bd. 3)}, publisher = {Deutschen Gesellschaft f{\"u}r Luft- und Raumfahrt}, address = {Bonn}, organization = {European Air and Space Conference <1, 2007, Berlin>}, issn = {0070-4083}, pages = {487 -- 496}, year = {2007}, language = {en} } @article{Gligorevic2013, author = {Gligorevic, Snjezana}, title = {Airport surface propagation channel in the C-Band: measurements and modeling}, series = {IEEE transactions on antennas and propagation}, volume = {Vol. 61}, journal = {IEEE transactions on antennas and propagation}, number = {Iss. 9}, publisher = {IEEE}, address = {New York}, issn = {0018-926x}, pages = {4792 -- 4802}, year = {2013}, language = {en} } @inproceedings{Gligorevic2013, author = {Gligorevic, Snjezana}, title = {Stochastic modeling of non-stationary channels}, series = {7th European Conference on Antennas and Propagation (EuCAP) : 8 - 12 April 2013, Gothenburg, Sweden}, booktitle = {7th European Conference on Antennas and Propagation (EuCAP) : 8 - 12 April 2013, Gothenburg, Sweden}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {European Association on Antennas and Propagation}, isbn = {978-1-4673-2187-7 ; 978-88-907018-1-8}, pages = {1677 -- 1681}, year = {2013}, language = {en} } @inproceedings{GligorevicSchneckenburgerFranzenetal.2011, author = {Gligorevic, Snjezana and Schneckenburger, N. and Franzen, N. and Schnell, Michael and M{\"u}ller, S. and G{\"u}nzel, H.}, title = {L-Band compatibility of LDACS1}, series = {3rd CEAS Air and Space Conference, 24 - 28 October 2011, Venezia, Italy}, booktitle = {3rd CEAS Air and Space Conference, 24 - 28 October 2011, Venezia, Italy}, organization = {European Air and Space Conference <3, 2011, Venezia>}, pages = {1 -- 8}, year = {2011}, language = {en} } @incollection{GligorevicEppleSchnell2011, author = {Gligorevic, Snjezana and Epple, Ulrich and Schnell, Michael}, title = {The LDACS1 physical layer design}, series = {Future aeronautical communications}, booktitle = {Future aeronautical communications}, publisher = {Intech}, address = {London}, isbn = {978-953-307-625-6}, pages = {317 -- 332}, year = {2011}, language = {en} } @incollection{KirchnerReisertSchoening2014, author = {Kirchner, Patrick and Reisert, Steffen and Sch{\"o}ning, Michael Josef}, title = {Calorimetric gas sensors for hydrogen peroxide monitoring in aseptic food processes}, series = {Gas sensing fundamentals. (Springer Series on Chemical Sensors and Biosensors ; 15)}, booktitle = {Gas sensing fundamentals. (Springer Series on Chemical Sensors and Biosensors ; 15)}, publisher = {Springer}, address = {Heidelberg}, isbn = {978-3-642-54518-4 (Print) ; 978-3-642-54519-1 (Online)}, doi = {10.1007/5346_2013_51}, pages = {279 -- 309}, year = {2014}, abstract = {For the sterilisation of aseptic food packages it is taken advantage of the microbicidal properties of hydrogen peroxide (H2O2). Especially, when applied in vapour phase, it has shown high potential of microbial inactivation. In addition, it offers a high environmental compatibility compared to other chemical sterilisation agents, as it decomposes into oxygen and water, respectively. Due to a lack in sensory detection possibilities, a continuous monitoring of the H2O2 concentration was recently not available. Instead, the sterilisation efficacy is validated using microbiological tests. However, progresses in the development of calorimetric gas sensors during the last 7 years have made it possible to monitor the H2O2 concentration during operation. This chapter deals with the fundamentals of calorimetric gas sensing with special focus on the detection of gaseous hydrogen peroxide. A sensor principle based on a calorimetric differential set-up is described. Special emphasis is given to the sensor design with respect to the operational requirements under field conditions. The state-of-the-art regarding a sensor set-up for the on-line monitoring and secondly, a miniaturised sensor for in-line monitoring are summarised. Furthermore, alternative detection methods and a novel multi-sensor system for the characterisation of aseptic sterilisation processes are described.}, language = {en} } @article{NachtrodtTietschMostaccietal.2014, author = {Nachtrodt, Frederik and Tietsch, Wolfgang and Mostacci, Domiziano and Scherer, Ulrich W.}, title = {Set-up and first operation of a plasma oven for treatment of low level radioactive wastes}, series = {Nuclear technology and radiation protection}, volume = {29}, journal = {Nuclear technology and radiation protection}, number = {Suppl.}, publisher = {VINČA Institute of Nuclear Sciences}, address = {Belgrad}, issn = {1451-3994}, doi = {10.2298/NTRP140SS47N}, pages = {47 -- 51}, year = {2014}, language = {en} } @article{SrivastavaLahiriMaitietal.2014, author = {Srivastava, A. and Lahiri, S. and Maiti, M. and Knolle, F. and Hoyler, Friedrich and Scherer, Ulrich W. and Schnug, E. W.}, title = {Study of naturally occurring radioactive material (NORM) in top soil of Punjab State from the North Western part of India}, series = {Journal of Radioanalytical and Nuclear Chemistry}, volume = {2014}, journal = {Journal of Radioanalytical and Nuclear Chemistry}, number = {302}, publisher = {Springer Nature}, address = {Basel}, issn = {1588-2780 (E-Journal); 0022-4081 (Print); 0134-0719 (Print); 0236-5731 (Print); 1417-2097 (Print)}, doi = {0.1007/s10967-014-3450-1}, pages = {1049 -- 1052}, year = {2014}, language = {en} } @article{SiqueiraMolinnusBegingetal.2014, author = {Siqueira, Jose R. and Molinnus, Denise and Beging, Stefan and Sch{\"o}ning, Michael Josef}, title = {Incorporating a hybrid urease-carbon nanotubes sensitive nanofilm on capacitive field-effect sensors for urea detection}, series = {Analytical chemistry}, volume = {86}, journal = {Analytical chemistry}, number = {11}, publisher = {ACS Publications}, address = {Columbus}, issn = {1520-6882 (E-Journal); 0003-2700 (Print); 0096-4484 (Print)}, doi = {10.1021/ac500458s}, pages = {5370 -- 5375}, year = {2014}, abstract = {The ideal combination among biomolecules and nanomaterials is the key for reaching biosensing units with high sensitivity. The challenge, however, is to find out a stable and sensitive film architecture that can be incorporated on the sensor's surface. In this paper, we report on the benefits of incorporating a layer-by-layer (LbL) nanofilm of polyamidoamine (PAMAM) dendrimer and carbon nanotubes (CNTs) on capacitive electrolyte-insulator-semiconductor (EIS) field-effect sensors for detecting urea. Three sensor arrangements were studied in order to investigate the adequate film architecture, involving the LbL film with the enzyme urease: (i) urease immobilized directly onto a bare EIS [EIS-urease] sensor; (ii) urease atop the LbL film over the EIS [EIS-(PAMAM/CNT)-urease] sensor; and (iii) urease sandwiched between the LbL film and another CNT layer [EIS-(PAMAM/CNT)-urease-CNT]. The surface morphology of all three urea-based EIS biosensors was investigated by atomic force microscopy (AFM), while the biosensing abilities were studied by means of capacitance-voltage (C/V) and dynamic constant-capacitance (ConCap) measureaments at urea concentrations ranging from 0.1 mM to 100 mM. The EIS-urease and EIS-(PAMAM/CNT)-urease sensors showed similar sensitivity (∼18 mV/decade) and a nonregular signal behavior as the urea concentration increased. On the other hand, the EIS-(PAMAM/CNT)-urease-CNT sensor exhibited a superior output signal performance and higher sensitivity of about 33 mV/decade. The presence of the additional CNT layer was decisive to achieve a urea based EIS sensor with enhanced properties. Such sensitive architecture demonstrates that the incorporation of an adequate hybrid enzyme-nanofilm as sensing unit opens new prospects for biosensing applications using the field-effect sensor platform.}, language = {en} } @article{MuribYeapMartensetal.2014, author = {Murib, Mohammed Sharif and Yeap, Weng-Siang and Martens, Daan and Bienstman, Peter and Ceuninck, Ward de and Grinsven, Bart van and Sch{\"o}ning, Michael Josef and Michiels, Luc and Haenen, Ken and Ameloot, Marcel and Serpeng{\"u}zel, Ali and Wagner, Patrick}, title = {Photonic detection and characterization of DNA using sapphire microspheres}, series = {Journal of biomedical optics}, volume = {19}, journal = {Journal of biomedical optics}, number = {9}, publisher = {SPIE}, address = {Bellingham}, issn = {1560-2281 (E-Journal); 1083-3668 (Print)}, doi = {10.1117/1.JBO.19.9.097006}, pages = {097006}, year = {2014}, abstract = {A microcavity-based deoxyribonucleic acid (DNA) optical biosensor is demonstrated for the first time using synthetic sapphire for the optical cavity. Transmitted and elastic scattering intensity at 1510 nm are analyzed from a sapphire microsphere (radius 500  μm, refractive index 1.77) on an optical fiber half coupler. The 0.43 nm angular mode spacing of the resonances correlates well with the optical size of the sapphire sphere. Probe DNA consisting of a 36-mer fragment was covalently immobilized on a sapphire microsphere and hybridized with a 29-mer target DNA. Whispering gallery modes (WGMs) were monitored before the sapphire was functionalized with DNA and after it was functionalized with single-stranded DNA (ssDNA) and double-stranded DNA (dsDNA). The shift in WGMs from the surface modification with DNA was measured and correlated well with the estimated thickness of the add-on DNA layer. It is shown that ssDNA is more uniformly oriented on the sapphire surface than dsDNA. In addition, it is shown that functionalization of the sapphire spherical surface with DNA does not affect the quality factor (Q≈104) of the sapphire microspheres. The use of sapphire is especially interesting because this material is chemically resilient, biocompatible, and widely used for medical implants.}, language = {en} } @article{MarxSchenkBehrensetal.2013, author = {Marx, Ulrich and Schenk, Friedrich and Behrens, Jan and Meyr, Ulrike and Wanek, Paul and Zang, Werner and Schmitt, Robert and Br{\"u}stle, Oliver and Zenke, Martin and Klocke, Fritz}, title = {Automatic production of induced pluripotent stem cells}, series = {Procedia CIRP : First CIRP Conference on BioManufacturing}, volume = {Vol. 5}, journal = {Procedia CIRP : First CIRP Conference on BioManufacturing}, publisher = {Elsevier}, address = {Amsterdam}, issn = {2212-8271}, pages = {2 -- 6}, year = {2013}, language = {en} } @inproceedings{PfaffVinsonneauBurnham2006, author = {Pfaff, Raphael and Vinsonneau, B. and Burnham, K. J.}, title = {Multiple models for nonlinear systems}, series = {Proceedings / Eigteenth International Conference on Systems Engineering : ICSE 2006 : 5 - 7 September 2006 ; [held at Coventry University, UK]}, booktitle = {Proceedings / Eigteenth International Conference on Systems Engineering : ICSE 2006 : 5 - 7 September 2006 ; [held at Coventry University, UK]}, organization = {International Conference on Systems Engineering <18, 2006, Coventry>}, isbn = {1-84600-013-0}, pages = {347 -- 352}, year = {2006}, language = {en} } @inproceedings{PieperSchulz2014, author = {Pieper, Martin and Schulz, Silvia}, title = {Teaching Simulation Methods with COMSOL Multiphysics}, organization = {COMSOL Conference <2014, Cambridge>}, pages = {7}, year = {2014}, abstract = {This paper describes two courses on simulation methods for graduate students: "Simulation Methods" and "Simulation and Optimization in Virtual Engineering" The courses were planned to teach young engineers how to work with simulation software as well as to understand the necessary mathematical background. As simulation software COMSOL is used. The main philosophy was to combine theory and praxis in a way that motivates the students. In addition "soft skills" should be improved. This was achieved by project work as final examination. As underlying didactical principle the ideas of Bloom's revised taxonomy were followed. The paper basically focusses on educational aspects, e.g. how to structure the course, plan the exercises, organize the project work and include practical COMSOL examples.}, language = {en} } @incollection{Pietsch2013, author = {Pietsch, Wolfram}, title = {A framework for strategic positioning of IT-products}, series = {Software business : from physical products to software services and solutions : 4th International Conference on Software Business, ICSOB 2013; Potsdam; Germany; 11 June 2013 through 14 June 2013. (Lecture notes in business information processing ; 150)}, booktitle = {Software business : from physical products to software services and solutions : 4th International Conference on Software Business, ICSOB 2013; Potsdam; Germany; 11 June 2013 through 14 June 2013. (Lecture notes in business information processing ; 150)}, publisher = {Springer}, address = {Berlin}, doi = {10.1007/978-3-642-39336-5_11}, pages = {102 -- 116}, year = {2013}, abstract = {IT Products are viewed and managed differently depending on the perspectives and the stage within the life cycle. A model is presented that integrates different perspectives and stages serving as an aid for the analysis of business models and focused positioning of IT-products. Four generic business models are analysed with regard to the product management function in general and the positioning field for IT-products specifically: off-the-shelf (license), license plus service, project, and system service (incl. cloud computing).}, language = {en} } @article{GuoMiyamotoWagneretal.2014, author = {Guo, Yuanyuan and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo}, title = {Device simulation of the light-addressable potentiometric sensor for the investigation of the spatial resolution}, series = {Sensors and actuators B: Chemical}, volume = {204}, journal = {Sensors and actuators B: Chemical}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-3077 (E-Journal); 0925-4005 (Print)}, doi = {10.1016/j.snb.2014.08.016}, pages = {659 -- 665}, year = {2014}, abstract = {As a semiconductor-based electrochemical sensor, the light-addressable potentiometric sensor (LAPS) can realize two dimensional visualization of (bio-)chemical reactions at the sensor surface addressed by localized illumination. Thanks to this imaging capability, various applications in biochemical and biomedical fields are expected, for which the spatial resolution is critically significant. In this study, therefore, the spatial resolution of the LAPS was investigated in detail based on the device simulation. By calculating the spatiotemporal change of the distributions of electrons and holes inside the semiconductor layer in response to a modulated illumination, the photocurrent response as well as the spatial resolution was obtained as a function of various parameters such as the thickness of the Si substrate, the doping concentration, the wavelength and the intensity of illumination. The simulation results verified that both thinning the semiconductor substrate and increasing the doping concentration could improve the spatial resolution, which were in good agreement with known experimental results and theoretical analysis. More importantly, new findings of interests were also obtained. As for the dependence on the wavelength of illumination, it was found that the known dependence was not always the case. When the Si substrate was thick, a longer wavelength resulted in a higher spatial resolution which was known by experiments. When the Si substrate was thin, however, a longer wavelength of light resulted in a lower spatial resolution. This finding was explained as an effect of raised concentration of carriers, which reduced the thickness of the space charge region. The device simulation was found to be helpful to understand the relationship between the spatial resolution and device parameters, to understand the physics behind it, and to optimize the device structure and measurement conditions for realizing higher performance of chemical imaging systems.}, language = {en} } @article{ReisertGeisslerWeileretal.2015, author = {Reisert, Steffen and Geissler, H. and Weiler, C. and Wagner, P. and Sch{\"o}ning, Michael Josef}, title = {Multiple sensor-type system for monitoring the microbicidal effectiveness of aseptic sterilisation processes}, series = {Food control}, volume = {47}, journal = {Food control}, issn = {1873-7129 (E-Journal); 0956-7135 (Print)}, doi = {10.1016/j.foodcont.2014.07.063}, pages = {615 -- 622}, year = {2015}, abstract = {The present work describes a novel multiple sensor-type system for the real-time analysis of aseptic sterilisation processes employing gaseous hydrogen peroxide (H2O2) as a sterilant. The inactivation kinetics of Bacillus atrophaeus by gaseous H2O2 have been investigated by means of a methodical calibration experiment, taking into account the process variables H2O2 concentration, humidity and gas temperature. It has been found that the microbicidal effectiveness at H2O2 concentrations above 2\% v/v is largely determined by the concentration itself, while at lower H2O2 concentrations, the gas temperature and humidity play a leading role. Furthermore, the responses of different types of gas sensors towards the influencing factors of the sterilisation process have been analysed within the same experiment. Based on a correlation established between the inactivation kinetics and the sensor responses, a calorimetric H2O2 sensor and a metal-oxide semiconductor (MOX) sensor have been identified as possible candidates for monitoring the microbicidal effectiveness of aseptic sterilisation processes employing gaseous H2O2. Therefore, two linear models that describe the relationship between sensor response and microbicidal effectiveness have been proposed.}, language = {en} } @article{KhaydukovaZadorozhnayaKirsanovetal.2014, author = {Khaydukova, M. M. and Zadorozhnaya, O. A. and Kirsanov, D. O. and Iken, Heiko and Rolka, David and Sch{\"o}ning, Michael Josef and Babain, V. A. and Vlasov, Yu. G. and Legin, A. V.}, title = {Multivariate processing of atomic-force microscopy images for detection of the response of plasticized polymeric membranes}, series = {Russian journal of applied chemistry}, volume = {87}, journal = {Russian journal of applied chemistry}, number = {3}, publisher = {Springer}, address = {Dordrecht}, issn = {1608-3296 (E-Journal); 1070-4272 (Print)}, doi = {10.1134/S1070427214030112}, pages = {307 -- 314}, year = {2014}, abstract = {The possibility of using the atomic-force microscopy as a method for detection of the analytical signal from plasticized polymeric sensor membranes was analyzed. The surfaces of cadmium-selective membranes based on two polymeric matrices were examined. The digital images were processed with multivariate image analysis techniques. A correlation was found between the surface profile of an ion-selective membrane and the concentration of the ion in solution.}, language = {en} } @inproceedings{SchirraWatmuffBauschat2014, author = {Schirra, Julian and Watmuff, Jon and Bauschat, J.-Michael}, title = {A relative assessment of existing potential-methodologies to accurately estimate the induced drag of highly non-planar lifting systems}, series = {Advanced aero concepts, design and operations : Applied Aerodynamics Conference : July 22 -24, 2014, Bristol, UK}, booktitle = {Advanced aero concepts, design and operations : Applied Aerodynamics Conference : July 22 -24, 2014, Bristol, UK}, organization = {Applied Aerodynamics Conference <2014, Bristol>}, pages = {1 -- 13}, year = {2014}, language = {en} } @inproceedings{WetterKern2014, author = {Wetter, Martin and Kern, Alexander}, title = {Number of lightning strikes to tall structures - comparison of calculations and measurements using a modern lightning monitoring system}, series = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, booktitle = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, organization = {International Conference on Lightning Protection <2014, Shanghai>}, pages = {1 -- 7}, year = {2014}, language = {en} } @inproceedings{KernSchelthoffMathieu2012, author = {Kern, Alexander and Schelthoff, Christof and Mathieu, Moritz}, title = {Calculation of interception efficiencies for mesh-type air-terminations according to IEC 62305-3 using a dynamic electro-geometrical model}, series = {International Conference on Lightning Protection (ICLP) : 2 - 7 Sept. 2012, Vienna}, booktitle = {International Conference on Lightning Protection (ICLP) : 2 - 7 Sept. 2012, Vienna}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {International Conference on Lightning Protection <2012, Wien>}, isbn = {978-1-4673-1896-9 (E-Book) ; 978-1-4673-1898-3 (Print)}, pages = {1 -- 6}, year = {2012}, language = {en} } @inproceedings{LoPiparoKernMazzetti2012, author = {Lo Piparo, G. B. and Kern, Alexander and Mazzetti, C.}, title = {Some masterpoints about risk due to lightning}, series = {International Conference on Lightning Protection (ICLP) : 2 - 7 Sept. 2012, Vienna}, booktitle = {International Conference on Lightning Protection (ICLP) : 2 - 7 Sept. 2012, Vienna}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {International Conference on Lightning Protection <2012, Wien>}, isbn = {978-1-4673-1896-9 (E-Book) ; 978-1-4673-1898-3 (Print)}, pages = {1 -- 6}, year = {2012}, language = {en} } @article{MuellerHirschfeldLambertzetal.2014, author = {M{\"u}ller, Martin and Hirschfeld, Julian and Lambertz, Rita and Schulze Lohoff, Andreas and Lustfeld, Hans and Pfeifer, Heinz and Reißel, Martin}, title = {Validation of a novel method for detecting and stabilizing malfunctioning areas in fuel cell stacks}, series = {Journal of power sources}, volume = {272}, journal = {Journal of power sources}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-2755 (E-Journal); 0378-7753 (Print)}, doi = {10.1016/j.jpowsour.2014.08.045}, pages = {225 -- 232}, year = {2014}, abstract = {In this paper a setup for detecting malfunctioning areas of MEAs in fuel cell stacks is described. Malfunctioning areas generate electric cross currents inside bipolar plates. To exploit this we suggest bipolar plates consisting not of two but of three layers. The third one is a highly conducting layer and segmented such that the cross currents move along the segments to the surface of the stack where they can be measured by an inductive sensor. With this information a realistic model can be used to detect the malfunctioning area. Furthermore the third layer will prevent any current inhomogeneity of a malfunctioning cell to spread to neighbouring cells in the stack. In this work the results of measurements in a realistic cell setup will be compared with the results obtained in simulation studies with the same configuration. The basis for the comparison is the reliable characterisation of the electrical properties of the cell components and the implication of these results into the simulation model. The experimental studies will also show the limits in the maximum number of segments, which can be used for a reliable detection of cross currents.}, language = {en} } @article{StadlerGarveyEmbsetal.2014, author = {Stadler, Alexander Maximilian and Garvey, Christopher J. and Embs, Jan Peter and Koza, Michael Marek and Unruh, Tobias and Artmann, Gerhard and Zaccai, Guiseppe}, title = {Picosecond dynamics in haemoglobin from different species: A quasielastic neutron scattering study}, series = {Biochimica et biophysica acta (BBA): General Subjects}, volume = {1840}, journal = {Biochimica et biophysica acta (BBA): General Subjects}, number = {10}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1872-8006 (E-Journal); 0304-4165 (Print)}, doi = {10.1016/j.bbagen.2014.06.007}, pages = {2989 -- 2999}, year = {2014}, language = {en} } @misc{BesslerMaurerMerkeletal.2009, author = {Bessler, Cornelius and Maurer, Karl-Heinz and Merkel, Marion and Siegert, Petra and Wieland, Susanne}, title = {Subtilisin from Bacillus Pumilus and detergent and cleaning agents containing said novel subtilisin [US Patentanmeldung / Internationale Patentanmeldung]}, publisher = {USPTO; WIPO}, address = {Washington; Genf}, pages = {1 -- 39}, year = {2009}, language = {en} } @inproceedings{PfaffBurnham2008, author = {Pfaff, Raphael and Burnham, Keith J.}, title = {On abstraction and interpretability: a behavioural perspective}, series = {19th International Conference on Systems Engineering 2008 : ICSENG '08 : 19 - 21 Aug. 2008, University of Nevada, Las Vegas, Nevada}, booktitle = {19th International Conference on Systems Engineering 2008 : ICSENG '08 : 19 - 21 Aug. 2008, University of Nevada, Las Vegas, Nevada}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {International Conference on Systems Engineering <19, 2008, Las Vegas, Nev.>}, isbn = {978-0-7695-3331-5 ; 978-0-7695-2719-2}, pages = {89 -- 94}, year = {2008}, language = {en} } @article{PfaffBurnham2009, author = {Pfaff, Raphael and Burnham, Keith J.}, title = {On abstraction and interpretability: a behavioural perspective}, series = {Systems Science}, volume = {Vol. 35}, journal = {Systems Science}, number = {Iss. 2}, issn = {0137-1223}, pages = {19 -- 26}, year = {2009}, language = {en} } @article{SeilerPichlerPfaffetal.2009, author = {Seiler, Friedrich and Pichler, Alexander and Pfaff, Raphael and Srulijes, Julio}, title = {Novel processing tools for automated doppler picture velocimetry (DPV) evaluation}, series = {Journal of visualization}, volume = {Vol. 12}, journal = {Journal of visualization}, number = {Iss. 4}, issn = {1343-8875}, pages = {323 -- 337}, year = {2009}, language = {en} } @article{YoshinobuMiyamotoWagneretal.2015, author = {Yoshinobu, Tatsuo and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef}, title = {Recent developments of chemical imaging sensor systems based on the principle of the light-addressable potentiometric sensor}, series = {Sensors and actuators B: Chemical}, volume = {207, Part B}, journal = {Sensors and actuators B: Chemical}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-3077 (E-Journal); 0925-4005 (Print)}, doi = {10.1016/j.snb.2014.09.002}, pages = {926 -- 932}, year = {2015}, abstract = {The light-addressable potentiometric sensor (LAPS) is an electrochemical sensor with a field-effect structure to detect the variation of the Nernst potential at its sensor surface, the measured area on which is defined by illumination. Thanks to this light-addressability, the LAPS can be applied to chemical imaging sensor systems, which can visualize the two-dimensional distribution of a particular target ion on the sensor surface. Chemical imaging sensor systems are expected to be useful for analysis of reaction and diffusion in various electrochemical and biological samples. Recent developments of LAPS-based chemical imaging sensor systems, in terms of the spatial resolution, measurement speed, image quality, miniaturization and integration with microfluidic devices, are summarized and discussed.}, language = {en} } @phdthesis{Pfaff2013, author = {Pfaff, Raphael}, title = {Evaluation and extension of the potential for application of the behavioural framework to practical engineering problems}, pages = {XVI, 231 S.}, year = {2013}, language = {en} } @masterthesis{Pfaff2007, type = {Bachelor Thesis}, author = {Pfaff, Raphael}, title = {Automated processing of the ISL Doppler images}, year = {2007}, language = {en} } @misc{Pfaff2006, type = {Master Thesis}, author = {Pfaff, Raphael}, title = {Modelling of nonlinear systems using piecewise defined models}, year = {2006}, language = {en} } @inproceedings{PfaffLarkowskiBurnham2011, author = {Pfaff, Raphael and Larkowski, Tomasz and Burnham, Keith J.}, title = {An application of adaptive control in the behavioural framework}, series = {21st International Conference on Systems Engineering (ICSEng) : 16 - 18 Aug. 2011, Las Vegas, Nevada ; proceedings}, booktitle = {21st International Conference on Systems Engineering (ICSEng) : 16 - 18 Aug. 2011, Las Vegas, Nevada ; proceedings}, publisher = {IEEE}, address = {Piscataway, NJ}, organization = {International Conference on Systems Engineering <21, 2011, Las Vegas>}, isbn = {978-1-4577-1078-0 ; 978-0-7695-4495-3}, pages = {49 -- 54}, year = {2011}, language = {en} } @inproceedings{PfaffLarkowskiBurnham2010, author = {Pfaff, Raphael and Larkowski, Tomasz and Burnham, Keith J.}, title = {An approach to adaptive control in the behavioural framework}, series = {UKACC International Conference on Control 2010 (CONTROL 2010) : Coventry, United Kingdom, 7 - 10 September 2010 ; Vol. 2. (IET seminar digest ; 2010/004)}, booktitle = {UKACC International Conference on Control 2010 (CONTROL 2010) : Coventry, United Kingdom, 7 - 10 September 2010 ; Vol. 2. (IET seminar digest ; 2010/004)}, publisher = {Curran}, address = {Red Hook, NY}, organization = {United Kingdom Automatic Control Council}, isbn = {978-1-62748-119-9}, pages = {833 -- 838}, year = {2010}, language = {en} } @inproceedings{SeilerPichlerPfaffetal.2008, author = {Seiler, Friedrich and Pichler, Alexander and Pfaff, Raphael and George, Alfred and Srulijes, Julio}, title = {Improved Doppler picture velocimetry and new automated processing}, series = {14th International Symposium on Applications of Laser Techniques to Fluid Mechanics : Lisbon, Portugal, 7 - 10 July 2008}, booktitle = {14th International Symposium on Applications of Laser Techniques to Fluid Mechanics : Lisbon, Portugal, 7 - 10 July 2008}, organization = {International Symposium on Applications of Laser Techniques to Fluid Mechanics <14, 2008, Lisboa>}, pages = {1 -- 12}, year = {2008}, language = {en} } @inproceedings{PfaffPichlerGeorgeetal.2007, author = {Pfaff, Raphael and Pichler, Alexander and George, Alfred and Seiler, Friedrich}, title = {Model based image processing for flow visualisation : 16th International Conference on Systems Science, Wroclaw, Poland, September 04 - 06, 2007}, series = {PU / Institut Franco-Allemand de Recherches de Saint-Louis ; 2007, 620}, booktitle = {PU / Institut Franco-Allemand de Recherches de Saint-Louis ; 2007, 620}, publisher = {ISL}, address = {Saint Louis, France}, organization = {International Conference on Systems Science <16, 2007, Wroclaw>}, pages = {1 -- 10}, year = {2007}, language = {en} } @article{RatkeMilowLisinskietal.2014, author = {Ratke, Lorenz and Milow, Barbara and Lisinski, Susanne and Hoepfner, Sandra}, title = {On an effect of fine ceramic particles on the structure of aerogels}, series = {Microgravity science and technology}, volume = {26}, journal = {Microgravity science and technology}, publisher = {Springer Nature}, address = {Heidelberg}, issn = {0938-0108 ; 1875-0494}, doi = {10.1007/s12217-014-9380-2}, pages = {103 -- 110}, year = {2014}, language = {en} } @inproceedings{RousseauKern2014, author = {Rousseau, Alain and Kern, Alexander}, title = {How to deal with environmental risk in IEC 62305-2}, series = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, booktitle = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, organization = {International Conference on Lightning Protection <2014, Shanghai>}, pages = {521 -- 527}, year = {2014}, abstract = {The 2nd edition of the lightning risk management standard (IEC 62305-2) considers structures, which may endanger environment. In these cases, the loss is not limited to the structure itself, which is valid for usual structures. In the past (Edition 1) this danger was simply taken into account by a special hazard factor, multiplying the existing risk for the structure with a number. Now, in the edition 2, we add to the risk for the structure itself a "second risk" due to the losses outside the structure. The losses outside can be treated independently from what occurs inside. This is a major advantage to analyze the risk for sensitive structures, like chemical plants, nuclear plants, or structures containing explosives, etc. In this paper, the existing procedure given by the European version EN 62305-2 Ed.2 is further developed and applied to a few structures.}, language = {en} } @inproceedings{KernBraun2014, author = {Kern, Alexander and Braun, Christian}, title = {Risk management according to IEC 62305-2 edition 2: 2010-12 assessment of structures with a risk of explosion}, series = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, booktitle = {2014 International Conference on Lightning Protection (ICLP), Shanghai, China}, organization = {International Conference on Lightning Protection <2014, Shanghai>}, pages = {1237 -- 1242}, year = {2014}, abstract = {Risk management for structures with a risk of explosion should be considered very carefully when performing a risk analysis according to IEC 62305-2. In contrast to the 2006 edition of the standard, the 2010 edition describes the topic "Structures with a risk of explosion" in more detail. Moreover, in Germany separate procedures and parameters are defined for the risk analysis of structures with a risk of explosion (Supplement 3 of the German DIN EN 62305-2 standard). This paper describes the contents and the relevant calculations of this Supplement 3, together with a numerical example.}, language = {en} } @article{MuribYeapMartensetal.2015, author = {Murib, M. S. and Yeap, W. S. and Martens, D. and Liu, X. and Bienstman, P. and Fahlman, M. and Sch{\"o}ning, Michael Josef and Michiels, L. and Haenen, K. and Serpeng{\"u}zel, A. and Wagner, Patrick}, title = {Photonic studies on polymer-coated sapphire-spheres : a model system for biological ligands}, series = {Sensors and actuators A: Physical}, volume = {222}, journal = {Sensors and actuators A: Physical}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1873-3069 (E-Journal); 0924-4247 (Print)}, doi = {10.1016/j.sna.2014.11.024}, pages = {212 -- 219}, year = {2015}, abstract = {In this study we show an optical biosensor concept, based on elastic light scattering from sapphire microspheres. Transmitted and elastic scattering intensity of the microspheres (radius 500 μm, refractive index 1.77) on an optical fiber half coupler is analyzed at 1510 nm. The 0.43 nm angular mode spacing of the resonances is comparable to the angular mode spacing value estimated using the optical size of the microsphere. The spectral linewidths of the resonances are in the order of 0.01 nm, which corresponds to quality factors of approximately 105. A polydopamine layer is used as a functionalizing agent on sapphire microspherical resonators in view of biosensor implementation. The varying layer thickness on the microsphere is determined as a function of the resonance wavelength shift. It is shown that polymer functionalization has a minor effect on the quality factor. This is a promising step toward the development of an optical biosensor.}, language = {en} } @article{GuoSekiMiyamotoetal.2014, author = {Guo, Yuanyuan and Seki, Kosuke and Miyamoto, Ko-ichiro and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, Tatsuo}, title = {Device simulation of the light-addressable potentiometric sensor with a novel photoexcitation method for a higher spatial resolution}, series = {Procedia Engineering}, volume = {87}, journal = {Procedia Engineering}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1877-7058}, doi = {10.1016/j.proeng.2014.11.369}, pages = {456 -- 459}, year = {2014}, abstract = {A novel photoexcitation method for the light-addressable potentiometric sensor (LAPS) realized a higher spatial resolution of chemical imaging. In this method, a modulated light probe, which generates the alternating photocurrent signal, is surrounded by a ring of constant light, which suppresses the lateral diffusion of photocarriers by enhancing recombination. A device simulation verified that a higher spatial resolution could be obtained by adjusting the gap between the modulated and constant light. It was also found that a higher intensity and a longer wavelength of constant light was more effective. However, there exists a tradeoff between the spatial resolution and the amplitude of the photocurrent, and thus, the signal-to-noise ratio. A tilted incidence of constant light was applied, which could achieve even higher resolution with a smaller loss of photocurrent.}, language = {en} } @article{MiyamotoSekiWagneretal.2014, author = {Miyamoto, K. and Seki, K. and Wagner, Torsten and Sch{\"o}ning, Michael Josef and Yoshinobu, T.}, title = {Enhancement of the spatial resolution of the chemical imaging sensor by a hybrid fiber-optic illumination}, series = {Procedia Engineering}, volume = {87}, journal = {Procedia Engineering}, publisher = {Elsevier}, address = {Amsterdam}, issn = {1877-7058}, doi = {10.1016/j.proeng.2014.11.563}, pages = {612 -- 615}, year = {2014}, abstract = {The chemical imaging sensor, which is based on the principle of the light-addressable potentiometric sensor (LAPS), is a powerful tool to visualize the spatial distribution of chemical species on the sensor surface. The spatial resolution of this sensor depends on the diffusion of photocarriers excited by a modulated light. In this study, a novel hybrid fiber-optic illumination was developed to enhance the spatial resolution. It consists of a modulated light probe to generate a photocurrent signal and a ring of constant light, which suppresses the lateral diffusion of minority carriers excited by the modulated light. It is demonstrated that the spatial resolution was improved from 92 μm to 68 μm.}, language = {en} }