TY - CHAP A1 - Ellinger, Frank A1 - Meister, Tilo A1 - Grosa, Patrick A1 - Jamshidi, Kambiz A1 - Ihle, David A1 - Franchi, Norman A1 - Wagner, Jens A1 - Richter, Andreas A1 - Fettweis, Gerhard A1 - Fitzek, Frank A1 - Kreissig, Martin A1 - Klessig, Henrik A1 - Kraemer, Rolf A1 - Richter, Klaus A1 - Frotzscher, Andreas A1 - Löhr, Robert A1 - Winkler, Wolfgang A1 - Zoeke, Dominik A1 - Carot, Alexander A1 - Bluschke, Andreas T1 - Project FAST - Fast Actuators Sensors & Transceivers T2 - Microwave Conference (LAMC), IEEE MTT-S Latin America, 12-14 Dec. 2016 Puerto Vallarta, Mexico Y1 - 2016 SN - 978-1-5090-4287-6 PB - IEEE CY - Piscataway, NJ ER - TY - GEN A1 - Staron, Peter A1 - Beckmann, Felix A1 - Lippmann, Thomas A1 - Stark, Andreas A1 - Oehring, Michael A1 - Pyczak, Florian A1 - Salgado, Mario A1 - Hort, Norbert A1 - Eckerlebe, Horst A1 - Kainer, Karl Ulrich A1 - Müller, Martin A1 - Schreyer, Andreas T1 - In situ studies of light metals with synchrotron radiation and neutrons T2 - Materials Science Forum Y1 - 2011 SN - 1662-9752 IS - 690 SP - 192 EP - 197 ER - TY - GEN A1 - Prein, Andreas A1 - Gobiet, Andreas A1 - Suklitsch, Martin A1 - Truhetz, Heimo A1 - Awan, N. K. A1 - Keuler, Klaus A1 - Georgievski, Goran T1 - Added value of convection permitting seasonal simulations T2 - Climate Dynamics Y1 - 2013 U6 - https://doi.org/10.1007/s00382-013-1744-6 VL - 41 SP - 2655 EP - 2677 ER - TY - GEN A1 - Kenda, Andreas A1 - Kraft, Martin A1 - Tortschanoff, Andreas A1 - Scherf, Werner A1 - Sandner, Thilo A1 - Schenk, Harald A1 - Luettjohann, Stephan A1 - Simon, Apolline T1 - Development, characterization and application of compact spectrometers based on MEMS with in-plane capacitive drives T2 - Next-generation spectroscopic technologies VII, 5 - 6 May 2014, Baltimore, Maryland, United States Y1 - 2014 SN - 978-1-62841-038-9 SP - 910102-1 EP - 910102-10 PB - SPIE CY - Bellingham, Wash. ER - TY - CHAP A1 - Ulrich, Rainer G. A1 - Schlegel, Matthias A1 - Mertens, Marc A1 - Groschup, Martin H. A1 - Schmidt-Chanasit, Jonas A1 - Plenge-Bönig, Anita A1 - Jacob, Jens A1 - Pelz, Hans-Joachim A1 - Freise, Jona A1 - Wenk, Matthias A1 - Thiel, Jörg A1 - Triebenbacher, Cornelia A1 - Schmolz, Eric A1 - Kurth, Andreas A1 - Krüger, Frank A1 - Rühe, Ferdinand A1 - Kiffner, Christian A1 - Ansorge, Hermann A1 - Gerwin, Werner A1 - Wegener, Wolfgang A1 - Müller, Jörg A1 - Bemmann, Margit A1 - Wolf, Ronny A1 - Otto, Lutz-Florian A1 - Oehme, Rainer A1 - Pfeffer, Martin A1 - Heckel, Gerald A1 - Schex, Susanne A1 - Essbauer, Sandra S. T1 - Netzwerk Nagetier-übertragene Pathogene: Monitoring von Hantavirus-Infektionen in Deutschland T2 - Wildhygiene, Wildtierkrankheiten, Parasiten, Epidemiologie Y1 - 2009 SN - 978-378-88131-2-3 SN - 1436-3895 SP - 229 EP - 250 PB - Ges. für Wildtier- und Jagdforschung CY - Halle/Saale ER - TY - GEN A1 - Kleefeld, Andreas A1 - Reißel, Martin T1 - The Levenberg-Marquardt method applied to a parameter estimation problem arising from electrical resistivity tomography T2 - Journal of Applied Mathematics and Computation N2 - An efficient and robust electrical resistivity tomographic inversion algorithm based on the Levenberg-Marquardt method is considered to obtain quantities like grain size, source discrimination and particle size distribution. The corresponding model in two-dimensions is based on the Maxwell equations and leads to a partial differential equation with mixed Dirichlet-Neumann boundary conditions. The forward problem is solved numerically with the finite-difference method. However, the inverse problem at hand is a classic nonlinear and ill-posed parameter estimation problem. Linearizing it and applying the Tikhonov regularization method yields an iterative scheme, the Levenberg-Marquardt method. Several systems of equations of large size have to be solved efficiently in each iteration step which is accomplished by the conjugate gradient method without setting up the corresponding matrix. Instead fast matrix-vector multiplications are performed directly. Therefore, the derivative and its adjoint for the parameter-to-solution map are needed. Numerical results demonstrate the performance of our method as well as the possibility to reconstruct some of the desired parameters. KW - Levenberg-Marquardt method KW - Fréchett derivative KW - nonlinear and ill-posed problem KW - estimation problem KW - parameter estimation problem Y1 - 2011 SN - 0096-3003 VL - 217 IS - 9 SP - 4490 EP - 4501 ER - TY - GEN A1 - Wätzold, Frank A1 - Drechsler, Martin A1 - Armstrong, Claire W. A1 - Baumgärtner, Stefan A1 - Grimm, Volker A1 - Huth, Andreas A1 - Perrings, Charles A1 - Possingham, Hugh P. A1 - Shogren, Jason F. A1 - Skonhoft, Anders A1 - Verboom-Vasiljev, Jana A1 - Wissel, Christian T1 - Ecological-economic modeling for biodiversity management: Potential, pitfalls, prospects Y1 - 2006 ER - TY - GEN A1 - Schloffer, Martin A1 - Iqbal, Farasat A1 - Gabrisch, Heike A1 - Schwaighofer, Emanuel A1 - Schimansky, Frank-Peter A1 - Mayer, Svea A1 - Stark, Andreas A1 - Lippmann, Thomas A1 - Göken, Mathias A1 - Pyczak, Florian A1 - Clemens, Helmut T1 - Microstructure development and hardness of a powder metallurgical multi phase gamma-TiAl based alloy T2 - Intermetallics Y1 - 2012 U6 - https://doi.org/10.1016/j.intermet.2011.11.015 SN - 0966-9795 IS - 22 SP - 231 EP - 240 ER - TY - GEN A1 - Schoder, Melanie A1 - Armbruster, Udo A1 - Martin, Andreas T1 - Heterogen katalysierte Hydrierung von Kohlendioxid zu Methan unter erhöhten Drücken T2 - Chemie Ingenieur Technik KW - Katalyse Y1 - 2013 SN - 1522-2640 VL - 85 IS - 3 SP - 344 EP - 352 ER - TY - GEN A1 - Lange, Felix A1 - Armbruster, Udo A1 - Martin, Andreas T1 - Heterogeneously-Catalyzed Hydrogenation of Carbon Dioxide to Methane using RuNi Bimetallic Catalysts T2 - Energy Technology KW - Katalyse Y1 - 2015 U6 - https://doi.org/10.1002/ente.201402113 SN - 2194-4296 VL - 3 IS - 1 SP - 55 EP - 62 ER - TY - CHAP A1 - Welk, Martin A1 - Kleefeld, Andreas A1 - Breuß, Michael ED - Benediktsson, Jón Atli ED - Chanussot, Jocelyn ED - Najman, Laurent ED - Talbot, Hugues T1 - Non-adaptive and Amoeba Quantile Filters for Colour Images T2 - Mathematical Morphology and Its Applications to Signal and Image Processing N2 - Quantile filters, or rank-order filters, are local image filters which assign quantiles of intensities of the input image within neighbourhoods as output image values. Combining a multivariate quantile definition developed in matrix-valued morphology with a recently introduced mapping between the RGB colour space and the space of symmetric 2×2 matrices, we state a class of colour image quantile filters, along with a class of morphological gradient filters derived from these. Using amoeba structuring elements, we devise image-adaptive versions of both filter classes. Experiments demonstrate the favourable properties of the filters. KW - Quantile KW - Rank-order filter KW - Color image KW - Matrix field KW - Amoebas Y1 - 2015 SN - 978-3-319-18719-8 SN - 978-3-319-18720-4 U6 - https://doi.org/10.1007/978-3-319-18720-4_34 SP - 398 EP - 409 PB - Springer International Publishing CY - Berlin ER - TY - GEN A1 - Schlummer, Martin A1 - Arends, Dagmar A1 - Mäurer, Andreas A1 - Markowski, Jens A1 - Wagenknecht, Udo T1 - Characterisation and materials flow management for waste electrical and electronic equipment plastics from German dismantling centres T2 - Waste Management & Research N2 - Waste electrical and electronic equipment is a complex waste stream and treatment options that work for one waste category or product may not be appropriate for others. A comprehensive case study has been performed for plastic-rich fractions that are treated in German dismantling centres. Plastics from TVs, monitors and printers and small household appliances have been characterised extensively. Based on the characterisation results, state-of-the-art treatment technologies have been combined to design an optimised recycling and upgrade process for each input fraction. High-impact polystyrene from TV casings that complies with the European directive on the restriction of hazardous substances (RoHS) was produced by applying continuous density separation with yields of about 60%. Valuable acrylonitrile butadiene styrene/ polycarbonate can be extracted from monitor and printer casings by near- infrared-based sorting. Polyolefins and/or a halogen-free fraction of mixed styrenics can be sorted out by density separation from monitors and printers and small household appliances. Emerging separation technologies are discussed to improve recycling results. KW - Waste electrical and electronic equipment plastics KW - recycling, separation KW - characterisation, near-infrared Y1 - 2015 U6 - https://doi.org/10.1177/0734242x15588585 SN - 1096-3669 VL - 33 IS - 9 SP - 775 EP - 784 ER - TY - GEN A1 - Krondak, Martin A1 - Broncová, Gabriela A1 - Anikin, Sergey A1 - Merz, Andreas A1 - Mirsky, Vladimir M. T1 - Chemosensitive properties of poly-4,4'-dialkoxy2,2’-bipyrroles T2 - Journal of Solid State Electrochemistry N2 - Chemosensitive properties of 4,4′-dimethoxy-2,2′-bipyrrole and 4,4′-dibuthoxy-2,2′-bipyrrole were investigated. These new conductive polymers were polymerized by cyclic voltammetry on the platinum and gold interdigitated electrodes designed for 2- and 4-point measurement of lateral conductivity. Thus, obtained polymers demonstrated high sensitivity to HCl in the parts per million concentration range. Kinetics of the gaseous HCl influence on the ratios of conductivities measured by 2- and 4-point techniques was analyzed. Some response of the polymers conductance towards NH3, NO and oxygen was also observed, but with much lower sensitivity than towards HCl. In aqueous solutions, the polymer conductivity was pH dependent; in comparison with 4,4′-dibuthoxy-2,2′-bipyrrole, the conductivity range of the methoxy derivative was shifted to acidic range for about two pH units. A possibility to use the pH dependence for the development of enzymatic biosensors with pH transducing was demonstrated. KW - Conductive polymer KW - Sensor KW - Conductivity KW - HCI KW - Alkoxybipyrroles Y1 - 2006 U6 - https://doi.org/10.1007/s10008-005-0069-8 SN - 1432-8488 SN - 1433-0768 VL - 10 IS - 3 SP - 185 EP - 191 ER - TY - CHAP A1 - Seelig, Torsten A1 - Burchardt, Martin A1 - Krebs, Andreas A1 - Harlander, Uwe A1 - Egbers, Christoph T1 - PIV measurements in an axially stratified Taylor-Couette experiment T2 - Book of abstracts, School ISTROF 2016, Instabilities and Turbulence in Strato-Rotational Flows, July 11-13th, 2016, Le Havre Y1 - 2016 UR - https://docs.google.com/viewer?a=v&pid=sites&srcid=ZGVmYXVsdGRvbWFpbnxzY2hvb2xpc3Ryb2Z8Z3g6NDA3Y2E3ZGQ2OWIwMTdmNQ ER - TY - GEN A1 - Kammerer, Sarah A1 - Sokolowski, Armin Andreas A1 - Hackl, Hubert A1 - Platzer, Dieter A1 - Jahn, Stephan Wenzel A1 - El-Heliebi, Amin A1 - Schwarzenbacher, Daniela A1 - Stiegelbauer, Verena A1 - Pichler, Martin A1 - Rezania, Simin A1 - Fiegl, Heidelinde A1 - Peintinger, Florentia A1 - Regitnig, Peter A1 - Höfler, Gerald A1 - Schreibmayer, Wolfgang A1 - Bauernhofer, Thomas T1 - KCNJ3 is a new independent prognostic marker for estrogen receptor positive breast cancer patients T2 - OncoTarget : open access impact journal N2 - Numerous studies showed abnormal expression of ion channels in different cancer types. Amongst these, the potassium channel gene KCNJ3 (encoding for GIRK1 proteins) has been reported to be upregulated in tumors of patients with breast cancer and to correlate with positive lymph node status. We aimed to study KCNJ3 levels in different breast cancer subtypes using gene expression data from the TCGA, to validate our findings using RNA in situ hybridization in a validation cohort (GEO ID GSE17705), and to study the prognostic value of KCNJ3using survival analysis. In a total of > 1000 breast cancer patients of two independent data sets we showed a) that KCNJ3 expression is upregulated in tumor tissue compared to corresponding normal tissue (p < 0.001), b) that KCNJ3 expression is associated with estrogen receptor (ER) positive tumors (p < 0.001), but that KCNJ3 expression is variable within this group, and c) that ER positive patients with high KCNJ3 levels have worse overall (p < 0.05) and disease free survival probabilities (p < 0.01), whereby KCNJ3 is an independent prognostic factor (p <0.05). In conclusion, our data suggest that patients with ER positive breast cancer might be stratified into high risk and low risk groups based on the KCNJ3 levels in the tumor. Y1 - 2016 U6 - https://doi.org/10.18632/oncotarget.13224 VL - 7 IS - 51 SP - 84705 EP - 84717 ER - TY - GEN A1 - Bambach, Markus A1 - Sizova, Irina A1 - Sviridov, Alexander A1 - Stendal, Johan Andreas A1 - Günther, Martin T1 - Batch Processing in Preassembled Die Sets - A New Process Design for Isothermal Forging of Titanium Aluminides T2 - Journal of Manufacturing and Materials Processing Y1 - 2018 U6 - https://doi.org/doi:10.3390/jmmp2010001 SN - 2504-4494 VL - 2 IS - 1 ER - TY - RPRT A1 - Böhm, Uwe A1 - Kücken, Martin A1 - Ahrens, Wilfried A1 - Block, Alexander A1 - Hauffe, Detlef A1 - Keuler, Klaus A1 - Rockel, Burkhardt A1 - Will, Andreas T1 - CLM - The Climate Version of LM: Brief Description and Long-Term Applications Y1 - 2006 UR - http://www.cosmo-model.org/content/model/documentation/newsLetters/newsLetter06/cnl6_clm.pdf PB - COSMO Newsletter CY - Offenbach, Germany ER - TY - GEN A1 - Kahra, Marvin A1 - Breuß, Michael A1 - Kleefeld, Andreas A1 - Welk, Martin T1 - An Approach to Colour Morphological Supremum Formation using the LogSumExp Approximation T2 - arXiv N2 - Mathematical morphology is a part of image processing that has proven to be fruitful for numerous applications. Two main operations in mathematical morphology are dilation and erosion. These are based on the construction of a supremum or infimum with respect to an order over the tonal range in a certain section of the image. The tonal ordering can easily be realised in grey-scale morphology, and some morphological methods have been proposed for colour morphology. However, all of these have certain limitations. In this paper we present a novel approach to colour morphology extending upon previous work in the field based on the Loewner order. We propose to consider an approximation of the supremum by means of a log-sum exponentiation introduced by Maslov. We apply this to the embedding of an RGB image in a field of symmetric 2×2 matrices. In this way we obtain nearly isotropic matrices representing colours and the structural advantage of transitivity. In numerical experiments we highlight some remarkable properties of the proposed approach. Y1 - 2023 U6 - https://doi.org/10.48550/arXiv.2312.13792 SP - 1 EP - 12 ER - TY - CHAP A1 - Panchenko, Andriy A1 - Lanze, Fabian A1 - Zinnen, Andreas A1 - Henze, Martin A1 - Pennekamp, Jan A1 - Engel, Thomas A1 - Wehrle, Klaus T1 - Website Fingerprinting at Internet Scale T2 - Proceedings of the 23rd Internet Society (ISOC) Network and Distributed System Security Symposium (NDSS 2016), San Diego, USA, February 2016 Y1 - 2016 SN - 1-891562-41-X PB - Internet Society CY - Reston, VA ER - TY - CHAP A1 - Zaussinger, Florian A1 - Egbers, Christoph A1 - Driebe, Thomas A1 - Heintzmann, Pascal A1 - Canfield, Peter A1 - Meier, Martin A1 - Travnikov, Vadim A1 - Froitzheim, Andreas A1 - Haun, Peter T1 - ATMOFLOW - Simulating atmosphere flows on the international space station. Part II: Experiments and numerical simulations T2 - 69th International Astronautical Congress, 1 - 5 October 2018, Bremen, Germany Y1 - 2018 UR - https://iafastro.directory/iac/paper/id/42847/abstract-pdf/IAC-18,A2,7,18,x42847.brief.pdf?2018-08-31.10:50:07 ER - TY - GEN A1 - Pennekamp, Jan A1 - Henze, Martin A1 - Zinnen, Andreas A1 - Lanze, Fabian A1 - Wehrle, Klaus A1 - Panchenko, Andriy T1 - CUMUL & Co: High-Impact Artifacts for Website Fingerprinting Research T2 - 38th Annual Computer Security Applications Conference (ACSAC 2022), Austin, Texas, USA, December 5-9, 2022. N2 - Anonymous communication on the Internet is about hiding the relationship between communicating parties. At NDSS ’16, we presented a new website fingerprinting approach, CUMUL, that utilizes novel features and a simple yet powerful algorithm to attack anonymization networks such as Tor. Based on pattern observation of data flows, this attack aims at identifying the content of encrypted and anonymized connections. Apart from the feature generation and the used classifier, we also provided a large dataset to the research community to study the attack at Internet scale. In this paper, we emphasize the impact of our artifacts by analyzing publications referring to our work with respect to the dataset, feature extraction method, and source code of the implementation. Based on this data, we draw conclusions about the impact of our artifacts on the research field and discuss their influence on related cybersecurity topics. Overall, from 393 unique citations, we discover more than 130 academic references that utilize our artifacts, 61 among them are highly influential (according to SemanticScholar), and at least 43 are from top-ranked security venues. This data underlines the significant relevance and impact of our work as well as of our artifacts in the community and beyond. KW - Traffic Analysis;Website Fingerprinting; Privacy; Anonymous Communication; Onion Routing; Web Privacy Y1 - 2022 UR - https://www.acsac.org/2022/program/artifacts_competition/ ER - TY - CHAP A1 - Kleefeld, Andreas A1 - Breuß, Michael A1 - Welk, Martin A1 - Burgeth, Bernhard ED - Trémeau, Alain ED - Schettini, Raimondo ED - Tominaga, Shoji T1 - Adaptive Filters for Color Images: Median Filtering and Its Extensions T2 - Computational Color Imaging N2 - In this paper we are concerned with robust structure-preserving denoising filters for color images. We build on a recently proposed transformation from the RGB color space to the space of symmetric 2×2 matrices that has already been used to transfer morphological dilation and erosion concepts from matrix-valued data to color images. We investigate the applicability of this framework to the construction of color-valued median filters. Additionally, we introduce spatial adaptivity into our approach by morphological amoebas that offer excellent capabilities for structure-preserving filtering. Furthermore, we define color-valued amoeba M-smoothers as a generalization of the median-based concepts. Our experiments confirm that all these methods work well with color images. They demonstrate the potential of our approach to define color processing tools based on matrix field techniques. KW - Matrix field KW - Color image KW - Median filter KW - M-smoother KW - Amoeba filter Y1 - 2015 UR - http://link.springer.com/chapter/10.1007/978-3-319-15979-9_15# SN - 978-3-319-15978-2 U6 - https://doi.org/10.1007/978-3-319-15979-9_15 SP - 149 EP - 158 PB - Springer CY - Berlin ER - TY - PAT A1 - Trautmann, Martin A1 - Sanftl, Benedikt A1 - Kölpin, Alexander A1 - Heckel, Thomas A1 - Frey, Lothar A1 - Ditze, Stefan A1 - Endruschat, Achim A1 - Joffe, Christopher A1 - Rosskopf, Andreas A1 - Schriefer, Thomas T1 - System zur drahtlosen Übertragung von Energie und Daten Y1 - 2016 ER - TY - GEN A1 - Kuebart, Andreas A1 - Stabler, Martin T1 - Risikoprozesse statt Risikogebiete : Raumdimensionen der COVID-19-Pandemie in Deutschland T2 - Informationen zur Raumentwicklung Y1 - 2021 UR - https://elibrary.steiner-verlag.de/article/99.105010/izr202102004001 VL - 48 IS - 2 SP - 40 EP - 49 ER - TY - CHAP A1 - Kuebart, Andreas A1 - Stabler, Martin ED - Stegbauer, Christian ED - Clemens, Iris T1 - Infektionsnetzwerke und Infektionsorte–Super-spreading-Ereignisse in der Epidemie T2 - Corona-Netzwerke–Gesellschaft im Zeichen des Virus N2 - Für die Analyse von Ausbrüchen von Infektionskrankheiten wie der neuartigen Coronaviruskrankheit COVID-19, die sich über Tröpfchen, Aerosole oder Kontaktinfektion ausbreiten, bietet ein netzwerktheoretischer Ansatz einen besonderen Mehrwert, da eine Ansteckung von einer Person auf die andere notwendigerweise einen direkten Kontakt unter Kopräsenz impliziert und der Ausbruch im größeren Maßstab somit ein Netzwerkmuster aufweist. Neben dem für ein Infektionsgeschehen notwendigen Kontakt zwischen einem infektiösen und einem infizierbaren Individuum gibt es mit dem Ort des Infektionsprozesses allerdings noch eine weitere Variable, die die Rahmenbedingungen bestimmt und von erheblicher Bedeutung sein kann. Y1 - 2020 SN - 978-3-658-31394-4 SN - 978-3-658-31393-7 U6 - https://doi.org/10.1007/978-3-658-31394-4_4 SP - 35 EP - 43 PB - Springer CY - Wiesbaden ET - 1. Auflage ER - TY - CHAP A1 - Hauschildt, Katja A1 - Stark, Andreas A1 - Lorenz, Uwe A1 - Schell, Norbert A1 - Fischer, Torben A1 - Blankenburg, Malte A1 - Müller, Martin A1 - Pyczak, Florian T1 - Diffusion brazing of γ-TiAl-alloys: Investigations of the joint by electron microscopy and high-energy X-ray diffraction T2 - Intermetallic-based alloys - science, technology and applications, symposium held November 25-30, Boston, Massachusetts, U.S.A Y1 - 2013 U6 - https://doi.org/10.1557/opl.2012.1750 SP - 215 EP - 220 PB - Cambridge Univ. Press CY - Cambridge ER - TY - GEN A1 - Ho, Paul S. A1 - Zschech, Ehrenfried A1 - Schmeißer, Dieter A1 - Meyer, Moritz Andreas A1 - Huebner, Rene A1 - Hauschildt, Meike A1 - Zhang, Lijuan A1 - Gall, Martin A1 - Kraatz, Matthias T1 - Scaling effects on microstructure and reliability for cu interconnects KW - scaling KW - microstructure KW - interconnects Y1 - 2010 ER - TY - GEN A1 - Schnellenbach, Jan A1 - Borchard, Michael A1 - Doering, Detmar A1 - Freytag, Andreas A1 - Habermann, Gerd A1 - Hagen, Albrecht von der A1 - Hasse, Rolf A1 - Horn, Karen A1 - Kolev, Stefan A1 - Köster, Thomas A1 - Roth, Steffen J. A1 - Starbatty, Joachim A1 - Wilde, Martin A1 - Wohlgemuth, Michael T1 - Wirtschaftsverfassung statt Wirtschaftsregierung, Frankfurter Aufruf für eine ordnungspolitische Weichenstellung in Europa T2 - Frankfurter Allgemeine Zeitung Y1 - 2012 IS - 22.06.2012 ER - TY - GEN A1 - Stabler, Martin A1 - Kuebart, Andreas T1 - Tempo-spatial dynamics of COVID-19 in Germany: A phase model based on a pandemic severity indicator T2 - medRxiv Y1 - 2023 U6 - https://doi.org/10.1101/2023.02.17.23286084 ER - TY - GEN A1 - Kuebart, Andreas A1 - Stabler, Martin T1 - Waves in time, but not in space-An analysis of pandemic severity of COVID-19 in Germany based on spatio-temporal clustering T2 - medRxiv Y1 - 2023 UR - https://www.medrxiv.org/content/10.1101/2023.01.27.23285105v1 U6 - https://doi.org/10.1101/2023.01.27.23285105 SP - 1 EP - 20 ER - TY - GEN A1 - Kuebart, Andreas A1 - Stabler, Martin T1 - Waves in time, but not in space – an analysis of pandemic severity of COVID-19 in Germany T2 - Spatial and spatio-temporal epidemiology N2 - While pandemic waves are often studied on the national scale, they typically are not distributed evenly within countries. This study presents a novel approach to analyzing the spatial-temporal dynamics of the COVID-19 pandemic in Germany. By using a composite indicator of pandemic severity and subdividing the pandemic into fifteen phases, we were able to identify similar trajectories of pandemic severity among all German counties through hierarchical clustering. Our results show that the hotspots and cold spots of the first four waves were relatively stationary in space. This highlights the importance of examining pandemic waves on a regional scale to gain a more comprehensive understanding of their dynamics. By combining spatial autocorrelation and spatial-temporal clustering of time series, we were able to identify important patterns of regional anomalies, which can help target more effective public health interventions on a regional scale. Y1 - 2023 U6 - https://doi.org/10.1016/j.sste.2023.100605 SN - 1877-5845 VL - 47 SP - 1 EP - 9 ER - TY - GEN A1 - Welk, Martin A1 - Kleefeld, Andreas A1 - Breuß, Michael T1 - Quantile Filtering of Colour Images via Symmetric Matrices T2 - Mathematical Morphology - Theory and Applications N2 - Quantile filters, or rank-order filters, are local image filters which assign quantiles of intensities of the input image within neighbourhoods as output image values. Combining a multivariate quantile definition developed in matrix-valued morphology with a recently introduced mapping between the RGB colour space and the space of symmetric 2 × 2 matrices, we state a class of colour image quantile filters, along with a class of morphological gradient filters derived from these.We consider variants of these filters based on three matrix norms – the nuclear, Frobenius, and spectral norm – and study their differences. We investigate the properties of the quantile and gradient filters and their links to dilation and erosion operators. Using amoeba structuring elements,we devise image-adaptive versions of our quantile and gradient filters. Experiments are presented to demonstrate the favourable properties of the filters, and compare them to existing approaches in colour morphology. KW - quantile KW - rank-order filter KW - colour image KW - matrix field KW - amoebas Y1 - 2016 U6 - https://doi.org/10.1515/mathm-2016-0008 SN - 2353-3390 VL - 1 IS - 1 SP - 136 EP - 174 ER - TY - GEN A1 - Martin, Titus A1 - Braun, Alexander A1 - Michel, Sven A1 - Wendler, Johannes A1 - Nocke, Andreas A1 - Cherif, Chokri A1 - Ibarlucea, Bergoi A1 - Cuniberti, Gianaurelio T1 - Development of textile-based and planar sensors for continuous non-invasive real-time recording of the lactate value curve for diagnostics according to clinical requirements N2 - We hereby present the findings for a new technology to produce portable, flexible, long- term stable and high-resolution sensors and measuring systems for individual lactate value recording in body sweat for regenerative and sports. A main goal of this study has been the identification of application sites according to body sweat quality and quantity, as well as easy accessibility and handling of the measurement site. For the continuous recording of the lactate value curve with integrated temperature compensation, new types of multifunctional sensor constructions and evaluation algorithms have been developed that can detect and evaluate these parameters precisely and interference-free in real time in body sweat in order to establish a diagnostic correlation with the clinical, therapeutic and sports medicine performance- oriented application scenarios. For this purpose, suitable planar sensor principles have been investigated and a planar sensor was developed. A textile-based sensor suitable for long-term use (several hours to several days of use) has been developed as a braided construction. In particular, a functionalized chitosan layer with a sensitive enzyme and several required electrodes wires have been purposefully used. Due to a high selectivity, i.e. clear signal interpretation even in the presence of other substances in body sweat, enzymatic measuring systems in an amperometric measure- ment design were primarily investigated. The preferred solution of the developed planar sensor is to be used as a reference sensor for calibration and, together with the preferred solution of the textile sensor, is to be integrated into the demonstrators. From the intended project results, an immediate direct benefit can be derived for SMEs in the textile manufacturing, finishing and medical products sectors and for the measurement and sensor technology sector. Y1 - 2021 UR - https://www.aachen-dresden-denkendorf.de/fileadmin/user_upload/itc/teilnehmerbereich/Poster/56_Martin_4_BTU_Development_of_textile-based_sensors.pdf PB - ADD International Textile Conference 2021 ER - TY - GEN A1 - Kuebart, Andreas A1 - Stabler, Martin T1 - Infectious Diseases as Socio‐Spatial Processes: The COVID‐19 Outbreak In Germany T2 - Tijdschrift voor economische en sociale geografie = Journal of economic and social geography N2 - This paper argues that outbreaks of infectious diseases should be understood as socio‐spatial processes with complex geographies. Considering the different dimensions of space through which an outbreak unfolds, facilitates analysing spatial diffusion of infectious disease in contemporary societies. We attempt to highlight four relevant dimensions of space by applying the TPSN framework to the case of the recent COVID‐19 outbreak in Germany. By identifying key processes of disease diffusion in space, we can explain the spatial patterns of the COVID‐19 outbreak in Germany, which did not feature the well‐known patterns of spatially contagious as in or hierarchical diffusion. In contrast, we find superspreading events and especially relocation diffusion based on existing networks, on which the pathogen travelled like a blind passenger, to be more relevant. For us, these findings prove the value of combining relational thinking with geographic analysis for understanding epidemic outbreaks in contemporary societies. Y1 - 2020 U6 - https://doi.org/10.1111/tesg.12429 SN - 1467-9663 SN - 0040-747X VL - 111 IS - 3 SP - 482 EP - 496 ER - TY - GEN A1 - Zaussinger, Florian A1 - Canfield, Peter A1 - Froitzheim, Andreas A1 - Travnikov, Vadim A1 - Haun, Peter A1 - Meier, Martin A1 - Meyer, Antoine A1 - Heintzmann, Pascal A1 - Driebe, Thomas A1 - Egbers, Christoph T1 - AtmoFlow - Investigation of Atmospheric-Like Fluid Flows Under Microgravity Conditions T2 - Microgravity Science and Technology : An International Journal for Microgravity and Space Exploration Related Research Y1 - 2019 UR - https://link.springer.com/article/10.1007/s12217-019-09717-7 UR - 1875-0494 UR - https://www-docs.b-tu.de/fg-aerodynamik-stroemungslehre/public/PDF/Pubs/ELGRA2019_Book-of-abstracts.pdf U6 - https://doi.org/10.1007/s12217-019-09717-7 SN - 0938-0108 SP - 1 EP - 19 PB - Springer ER - TY - GEN A1 - Fügenschuh, Armin A1 - Homfeld, Henning A1 - Huck, Andreas A1 - Martin, Alexander A1 - Yuan, Zhi T1 - Scheduling Locomotives and Car Transfers in Freight Transport T2 - Transportation Science Y1 - 2008 U6 - https://doi.org/10.1287/trsc.1080.0248 SN - 1526-5447 SN - 0041-1655 VL - 42 IS - 4 SP - 478 EP - 491 ER - TY - GEN A1 - Hauschildt, Katja A1 - Stark, Andreas A1 - Schell, Norbert A1 - Müller, Martin A1 - Pyczak, Florian T1 - The transient liquid phase bonding process of a γ-TiAl alloy with brazing solders containing Fe or Ni T2 - Intermetallics Y1 - 2019 SN - 0966-9795 VL - 106 SP - 48 EP - 58 ER - TY - GEN A1 - Böhm, Uwe A1 - Kücken, Martin A1 - Ahrens, Wilfried A1 - Block, Alexander A1 - Hauffe, Detlef A1 - Keuler, Klaus A1 - Rockel, Burkhardt A1 - Will, Andreas T1 - The Climate Version of LM: Brief Description and Long-Term Applications T2 - COSMO Newsletter Y1 - 2006 UR - http://www.cosmo-model.org/content/model/documentation/newsLetters/newsLetter06/newsLetter_06.pdf IS - 6 SP - 225 EP - 235 ER - TY - GEN A1 - Strobel, Carsten A1 - Alvarado Chavarin, Carlos A1 - Völkel, Sandra A1 - Jahn, Andreas A1 - Hiess, Andre A1 - Knaut, Martin A1 - Albert, Matthias A1 - Wenger, Christian A1 - Steinke, Olaff A1 - Stephan, Ulf A1 - Röhlecke, Sören A1 - Mikolajick, Thomas T1 - Enhanced Electrical Properties of Optimized Vertical Graphene-Base Hot Electron Transistors T2 - ACS Applied Electronic Materials N2 - The arrival of high-mobility two-dimensional materials like graphene leads to the renaissance of former vertical semiconductor–metal–semiconductor (SMS) hot electron transistors. Because of the monolayer thickness of graphene, improved SMS transistors with a semimetallic graphene-base electrode are now feasible for high-frequency applications. In this study we report about a device that consists of amorphous silicon, graphene, and crystalline silicon. For the first time, this device is fabricated by a four-mask lithography process which leads to significant improvements in the device performance. A strongly increased common-emitter current gain of 2% could be achieved while the on–off ratio improved to 1.6 × 105, which is already higher than predicted theoretically. This could be mainly attributed to better interface characteristics and decreased lateral dimensions of the devices. A cutoff frequency of approximately 26 MHz could be forecasted based on the DC measurements of the device. KW - Graphene KW - Transistor Y1 - 2023 U6 - https://doi.org/10.1021/acsaelm.2c01725 SN - 2637-6113 VL - 5 IS - 3 SP - 1670 EP - 1675 ER - TY - GEN A1 - Boch, Steffen A1 - Allan, Eric A1 - Birkhofer, Klaus A1 - Bossdorf, Oliver A1 - Blüthgen, Nico A1 - Christ-Breulmann, Sabina A1 - Diekötter, Tim A1 - Dormann, Carsten F. A1 - Gossner, Martin M. A1 - Hallmann, Christine A1 - Hemp, Andreas A1 - Hölzel, Norbert A1 - Jung, Kirsten A1 - Klaus, Valentin H. A1 - Klein, Alexandra M. A1 - Kleinebecker, Till A1 - Lange, Markus A1 - Müller, Jörg A1 - Nacke, Heiko A1 - Prati, Daniel A1 - Renner, Swen C. A1 - Rothenwöhrer, Christoph A1 - Schall, Peter A1 - Schulze, Ernst-Detlef A1 - Socher, Stephanie A. A1 - Tscharntke, Teja A1 - Türke, Manfred A1 - Weiner, Christiane N. A1 - Weisser, Wolfgang W. A1 - Westphal, Catrin A1 - Wolters, Volkmar A1 - Wubet, Tesfaye A1 - Fischer, Markus T1 - Extensive und jährlich wechselnde Nutzungsintensität fördert den Artenreichtum im Grünland T2 - ANLIEGEN NATUR Y1 - 2016 UR - https://www.biom.uni-freiburg.de/mitarbeiter/dormann/boch2016anliegennatur.pdf SN - 1864-0729 VL - 38 IS - 1 SP - 86 EP - 95 ER - TY - GEN A1 - Strobel, Carsten A1 - Alvarado Chavarin, Carlos A1 - Richter, Karola A1 - Knaut, Martin A1 - Reif, Johanna A1 - Völkel, Sandra A1 - Jahn, Andreas A1 - Albert, Matthias A1 - Wenger, Christian A1 - Kirchner, Robert A1 - Bartha, Johann Wolfgang A1 - Mikolajick, Thomas T1 - Novel Graphene Adjustable-Barrier Transistor with Ultra-High Current Gain T2 - ACS Applied Materials & Interfaces N2 - A graphene-based three terminal barristor device was proposed to overcome the low on/off ratios and insufficient current saturation of conventional graphene field effect transistors. In this study, we fabricated and analyzed a novel graphene-based transistor, which resembles the structure of the barristor but uses a different operating condition. This new device, termed graphene adjustable-barriers transistor (GABT), utilizes a semiconductor-based gate rather than a metal−insulator gate structure to modulate the device currents. The key feature of the device is the two graphene-semiconductor Schottky barriers with different heights that are controlled simultaneously by the gate voltage. Due to the asymmetry of the barriers, the drain current exceeds the gate current by several orders of magnitude. Thus, the GABT can be considered an amplifier with an alterable current gain. In this work, a silicon−graphene−germanium GABT with an ultra-high current gain (ID/IG up to 8 × 106) was fabricated, and the device functionality was demonstrated. Additionally, a capacitance model is applied to predict the theoretical device performance resulting in an on−off ratio above 106, a swing of 87 mV/dec, and a drivecurrent of about 1 × 106 A/cm2. KW - Graphene KW - Transistor Y1 - 2022 U6 - https://doi.org/10.1021/acsami.2c10634 SN - 1944-8244 SN - 1944-8252 VL - 14 IS - 34 SP - 39249 EP - 39254 ER - TY - CHAP A1 - Schneider, Peter Irenäus A1 - Schwerdt, N. A1 - Kruip, M. A1 - Dally, Ortwin A1 - Maischberger, Martin A1 - Scholl, Andreas T1 - Die Aufgabe der Faustinathermen als Terminus post quem für den Bau der byzantinischen Stadtmauer T2 - Archäologischer Anzeiger : 2. Halbband 2013 Y1 - 2014 SN - 978-3-8030-2351-3 N1 - Aufsatz in: Niewöhner, Philipp: New Late Antique and Mediaeval Monuments from Miletus and the Middle Byzantine Decay of Anatolian Urbanism IS - 2 SP - 186 EP - 189 PB - Wasmuth CY - Tübingen [u.a.] ER - TY - CHAP A1 - Dally, Ortwin A1 - Maischberger, Martin A1 - Schneider, Peter Irenäus A1 - Scholl, Andreas T1 - The Town Center of Miletus from Roman Imperial Times to Late Antiquity T2 - Archaeology and the Cities of Asia Minor in Late Antiquity Y1 - 2011 SN - 978-0-974-18735-8 SP - 81 EP - 101 PB - Kelsey Museum of Archaeology CY - Ann Arbor ER -