TY - CHAP A1 - Geiger, Christian A1 - Stocklein, Jorg A1 - Berssenbrugge, Jan A1 - Paelke, Volker T1 - Mixed Reality Design of Control Strategies T2 - Volume 2: 29th Computers and Information in Engineering Conference, Parts A and B, 30.08.2009 - 02.09.2009, San Diego Y1 - 2009 UR - https://asmedigitalcollection.asme.org/IDETC-CIE/proceedings/IDETC-CIE2009/48999/1621/335536 SN - 978-0-7918-4899-9 U6 - https://doi.org/10.1115/DETC2009-87350 SP - 1621 EP - 1628 PB - ASMEDC ER - TY - CHAP A1 - Geiger, Christian A1 - Reckter, Holger A1 - Paschke, David A1 - Schulz, Florian T1 - Poster: Evolution of a Theremin-Based 3D-Interface for Music Synthesis T2 - 2008 IEEE Symposium on 3D User Interfaces, 08.03.2008 - 09.03.2008, Reno KW - Poster Y1 - 2008 UR - https://doi.org/10.1109/3DUI.2008.4476618 SN - 978-1-4244-2047-6 U6 - https://doi.org/10.1109/3DUI.2008.4476618 SP - 163 EP - 164 PB - IEEE ER - TY - CHAP A1 - Geiger, Christian A1 - Reckter, Holger A1 - Dumitrescu, Roman A1 - Kahl, Sascha A1 - Berssenbrügge, Jan ED - Jacko, Julie A. T1 - A Zoomable User Interface for Presenting Hierarchical Diagrams on Large Screens T2 - Human-Computer Interaction. Novel Interaction Methods and Techniques, 13th International Conference, HCI International 2009, San Diego, CA, USA, July 19-24, 2009, Proceedings, Part II Y1 - 2009 SN - 978-3-642-02576-1 U6 - https://doi.org/10.1007/978-3-642-02577-8_87 VL - 5611 SP - 791 EP - 800 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Geiger, Christian A1 - Rattay, Oliver T1 - TubeMouse - A Two-Handed Input Device for Flexible Objects T2 - 2008 IEEE Symposium on 3D User Interfaces, 08.03.2008 - 09.03.2008, Reno Y1 - 2008 UR - http://ieeexplore.ieee.org/document/4476587/ SN - 978-1-4244-2047-6 U6 - https://doi.org/10.1109/3DUI.2008.4476587 SP - 27 EP - 34 PB - IEEE ER - TY - CHAP A1 - Geiger, Christian A1 - Paelke, Volker A1 - Gansen, Ivonne ED - Hutchison, David ED - Kanade, Takeo ED - Kittler, Josef ED - Kleinberg, Jon M. ED - Mattern, Friedemann ED - Mitchell, John C. ED - Naor, Moni ED - Nierstrasz, Oscar ED - Pandu Rangan, C. ED - Steffen, Bernhard ED - Sudan, Madhu ED - Terzopoulos, Demetri ED - Tygar, Dough ED - Vardi, Moshe Y. ED - Weikum, Gerhard ED - Göbel, Stefan ED - Malkewitz, Rainer ED - Iurgel, Ido T1 - Navigating by Following Stories T2 - Technologies for Interactive Digital Storytelling and Entertainment, Third International Conference, TIDSE 2006, Darmstadt, Germany, December 4-6, 2006, Proceedings Y1 - 2006 UR - https://doi.org/10.1007/11944577_32 SN - 978-3-540-49934-3 U6 - https://doi.org/10.1007/11944577_32 SP - 324 EP - 333 PB - Springer CY - Berlin, Heidelberg ER - TY - CHAP A1 - Geiger, Christian A1 - Hogen, Michael A1 - Hornig, Jörn A1 - Schaar, Michael ED - Butz, Andreas ED - Greenberg, Saul ED - Bakker, Saskia ED - Loke, Lian ED - de Luca, Alexander T1 - Datenreise: : digital bits made tangible T2 - Proceedings of the 8th International Conference on Tangible, Embedded and Embodied Interaction - TEI '14, 16.02.2014 - 19.02.2014, Munich Y1 - 2013 UR - http://dl.acm.org/citation.cfm?doid=2540930 SN - 9781450326353 U6 - https://doi.org/10.1145/2540930.2540945 SP - 283 EP - 284 PB - ACM Press CY - New York ER - TY - CHAP A1 - Geiger, Christian A1 - Herder, Jens A1 - Göbel, Sebastian A1 - Heinze, Christin A1 - Marinos, Dionysios T1 - Design and Virtual Studio Presentation of a Traditional Archery Simulator T2 - Proceedings of the Entertainment Interfaces Track 2010 at Interaktive Kulturen, Duisburg, Germany, September 12-15, 2010 N2 - In this paper we describe the design of a virtual reality simulator for traditional intuitive archery. Traditional archers aim without a target figure. Good shooting results require an excellent body-eye coordination that allows the user to perform identical movements when drawing the bow. Our simulator provides a virtual archery experience and supports the user to learn and practice the motion sequence of traditional archery in a virtual environment. We use an infrared tracking system to capture the user’s movements in order to correct his movement. To provide a realistic haptic feedback a real bow is used as interaction device. Our system provides a believable user experience and supports the user to learn how to shoot in the traditional way. Following a user-centered iterative design approach we developed a number of prototypes and evaluated them for refinement in sequent iteration cycles. For illustration purposes we created a short video clip in our virtual studio about this project that presents the main ideas in an informative yet entertaining way. KW - vr archery KW - 3D interaction KW - interactive sport simulation KW - user experience KW - user-centered design KW - Lehre KW - VSVR KW - Virtual Reality Y1 - 2010 UR - https://dl.gi.de/handle/20.500.12116/7385;jsessionid=149F7CDB1184309727393899BD806939 UR - http://ceur-ws.org/Vol-634/Entertainment-Interfaces-Proceedings03.pdf SP - 37 EP - 44 CY - Duisburg ER - TY - CHAP A1 - Geiger, Christian A1 - Fritze, Robin A1 - Lehmann, Anke A1 - Stöcklein, Jörg ED - Schmidt, Albrecht ED - Gellersen, Hans ED - van den Hoven, Elise ED - Mazalek, Ali ED - Holleis, Paul ED - Villar, Nicolas T1 - HYUI: a visual framework for prototyping hybrid user interfaces T2 - Proceedings of the 2nd international conference on Tangible and embedded interaction - TEI '08, 18.02.2008 - 20.02.2008, Bonn Y1 - 2008 UR - http://portal.acm.org/citation.cfm?doid=1347390 SN - 9781605580043 U6 - https://doi.org/10.1145/1347390.1347406 PB - ACM Press CY - New York ER - TY - CHAP A1 - Geiger, Christian A1 - Ali, Soren A1 - Dilchert, Philipp T1 - The BildKlangPoet – a technical framework for designing mixed reality painting experiences using generative AI T2 - KUI 2025: XXII. Conference on Culture and Computer Science: Remixing analog and digital; September 25 - 26, 2025 KW - Virtuelle Realität KW - Erweiterte Realität (Informatik) KW - Künstliche Intelligenz KW - Interaktive Kunst KW - Bild Y1 - 2025 UR - https://mirevi.de/publications/bildklangpoet-live-creating-multimodal-new-media-art-experiences-with-genai/ UR - https://kui2025.htw-berlin.de/programme-2025/ ER - TY - CHAP A1 - Geiger, Chris A1 - Gerhard, Emil A1 - Säger, Mitja ED - Olivero, Lucas Fabian ED - Veiga, Pedro Alves da ED - Bandeira Araújo, António ED - Dourado, Patrícia ED - Silva, Bruno Mendes da T1 - persona.fractalis II – A trialog between artist, user and algorithm T2 - ARTECH ’23: Proceedings of the 11th International Conference on Digital and Interactive Arts KW - Virtuelle Realität KW - Installation (Kunst) KW - Interaktive Kunst Y1 - 2023 SN - 979-8-3315-1484-6 U6 - https://doi.org/10.1145/3632776.3632819 PB - ACM CY - New York ER - TY - INPR A1 - Geerkens, Simon A1 - Sieberichs, Christian A1 - Braun, Alexander A1 - Waschulzik, Thomas T1 - QI2 -- an Interactive Tool for Data Quality Assurance N2 - The importance of high data quality is increasing with the growing impact and distribution of ML systems and big data. Also the planned AI Act from the European commission defines challenging legal requirements for data quality especially for the market introduction of safety relevant ML systems. In this paper we introduce a novel approach that supports the data quality assurance process of multiple data quality aspects. This approach enables the verification of quantitative data quality requirements. The concept and benefits are introduced and explained on small example data sets. How the method is applied is demonstrated on the well known MNIST data set based an handwritten digits. KW - Data Structures and Algorithms KW - Machine Learning KW - Computers and Society KW - Artificial Intelligence Y1 - 2023 PB - arXiv ER - TY - CHAP A1 - Gavriilidis, Alexandros A1 - Müller, Dennis A1 - Müller-Schneiders, Stefan A1 - Velten, Jörg A1 - Kummert, Anton T1 - Sensor system blockage detection for night time headlight control based on camera and radar sensor information T2 - 15th International IEEE Conference on Intelligent Transportation Systems (ITSC), 2012, 16-19 Sept. 2012, Anchorage, Alaska, USA Y1 - 2012 SN - 978-1-4673-3063-3 U6 - https://doi.org/10.1109/ITSC.2012.6338854 SP - 78 EP - 83 PB - IEEE CY - Piscataway ER - TY - CHAP A1 - Gaudry, Arnaud A1 - Huber, Florian A1 - Flückiger, Julien A1 - Quirós, L A1 - Rutz, Adriano A1 - Kaiser, M A1 - Grondin, A A1 - Marcourt, Laurence A1 - Ferreira Queiroz, E A1 - Wolfender, Jean-Luc A1 - Allard, Pierre-Marie T1 - Short Lecture “Mass spectrometry-based sample vectorization for exploration of large chemodiverse datasets and efficient identification of new antiparasitic compounds” T2 - Planta Medica KW - Massenspektrometrie KW - Naturstoffchemie KW - Antiparasitäres Mittel KW - Arzneimittelforschung Y1 - 2022 U6 - https://doi.org/10.1055/s-0042-1758983 SN - 1439-0221 VL - 88 IS - 15 PB - Thieme ER - TY - CHAP A1 - Garbe, Katharina A1 - Herbst, Iris A1 - Herder, Jens T1 - Spatial Audio for Augmented Reality T2 - 10th International Conference on Human and Computer N2 - Using spatial audio successfully for augmented reality (AR) applications is a challenge, but is awarded with an improved user experience. Thus, we have extended the AR/VR framework \sc Morgan with spatial audio to improve users orientation in an AR application. In this paper, we investigate the users’ capability to localize and memorize spatial sounds (registered with virtual or real objects). We discuss two scenarios. In the first scenario, the user localizes only sound sources and in the second scenario the user memorizes the location of audio-visual objects. Our results reflect spatial audio performance within the application domain and show which technology pitfalls still exist. Finally, we provide design recommendations for spatial audio AR environments. KW - spatial audio KW - augmented reality KW - sound interaction KW - FHD KW - VSVR Y1 - 2007 SP - 53 EP - 58 CY - Düsseldorf, Aizu-Wakamatsu ER - TY - CHAP A1 - Galle, Bo A1 - Arellano, Santiago A1 - Conde, Vladimir A1 - Pfeffer, Melissa A1 - Barsotti, Sara A1 - Stefansdottir, Gerður A1 - Bergsson, Baldur A1 - Bergsson, Bergur A1 - Ingvarsson, Thorgils A1 - Weber, Konradin T1 - Ground based measurements of the gas emission from the Holuhraun volcanic fissure eruption on Iceland 2014/2015 T2 - Geophysical Research Abstracts: EGU General Assembly 2015 N2 - The since 31 August 2014 ongoing volcanic eruption at Holuhraun on Iceland is by far the strongest source of sulfur dioxide in Europe over the last 230 years with sustained emission rates exceeding 100 000 ton/day. This gas emission severely affects local population and has become a concern also for air traffic. The eruption has in December continued at constant pace for 3.5 months. Three scenarios are envisaged for the future; (1) the eruption stops, (2) the fissure extends under the Vattnajökul glacier and (3) Bardarbunga volcano erupts. The two later scenarios will cause increased gas emission, severe ash emissions and extended flooding. Under the scope of the EU-project FUTUREVOLC, a project with 3.5 years duration, aiming at making Iceland a supersite for volcanological research as a European contribution to GEO, we are developing a version of the Scanning DOAS instrument that is adapted to high latitudes with low UV radiation and severe meteorological conditions. Since the first day of the eruption several of these novel instruments has been monitoring the SO2 emission from the eruption. Data from our instruments are still after 3.5 months the only sustained ground-based monitoring of this gas emission. A lot of work is however needed to sustain this operation at a very remote site and under severe field conditions. At the same time the very high concentrations in the gas plume, in combination with bad meteorological conditions require the development of novel methods to derive reliable flux estimates. In this presentation we will discuss the instrumental issues and present the latest version of the emission estimates made from our measurements. KW - Luftreinhaltung KW - Vulkanismus KW - Messtechnik KW - Schwefeldioxid Y1 - 2015 UR - https://web.archive.org/web/20240616051633/https://meetingorganizer.copernicus.org/EGU2015/EGU2015-1722-1.pdf N1 - Vortragsabstract VL - 17 PB - Copernicus CY - Göttingen ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Herrmann, Burkhard A1 - Brauck, K. A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. T1 - Measuring Skeletal Muscle Elasticity in Patients with Hypogonadism by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with hypogonadism have reduced fat-free mass and in some cases a loss in muscle strength. We hypothesize that muscle elasticity of the lower extremities differs between patients with hypogonadism and healthy controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02016.pdf VL - 13 SP - 2016 ER - TY - JOUR A1 - Galban, Craig A1 - Maderwald, Stefan A1 - Eggebrecht, Holger A1 - Grote, Wolfgang A1 - de Greiff, A. A1 - Uffmann, K. A1 - Ladd, M. E. T1 - Monitoring the Effects of Chronic Obstructive Pulmonary Disease on Muscle Elasticity by MR Elastography JF - Proc. Intl. Soc. Mag. Reson. Med. N2 - Men afflicted with chronic obstructive pulmonary disease (COPD) show signs of muscle dysfunction, such as increased muscle fatigue and acidosis during exercise. We hypothesize that muscle elasticity of the lower extremities differs between patients with COPD and age-related controls. The shear modulus of the soleus muscle was measured non-invasively using MR elastography (MRE) at 0%, 5%, 10%, 15%, and 20% of the subject’s maximum applied force. The results from this study showed statistical differences between the patients and controls, even though there were no statistical differences in the maximum applied force. Y1 - 2005 UR - https://cds.ismrm.org/protected/05MProceedings/PDFfiles/02015.pdf VL - 13 SP - 2015 ER - TY - JOUR A1 - Gaida, Philipp A1 - Weinberg, Kerstin A1 - Jahr, Andreas T1 - Viscoelastic modelling and experimental results of a dielectric electro-active polymer diaphragm actuator JF - Proceedings in Applied Mathematics and Mechanics (PAMM) Y1 - 2014 U6 - https://doi.org/10.1002/pamm.201410225 SN - 1617-7061 VL - 14 IS - 1 SP - 475 EP - 476 PB - Wiley ET - 85th Annual Meeting of the GAMM. March 10th – 14th, 2014, Erlangen ER - TY - CHAP A1 - Gaida, Philipp A1 - Jahr, Andreas A1 - Weinberg, Kerstin ED - Dłużewsk, Paweł ED - Jurczak, Grzegorz ED - Young, Toby D. T1 - FEA and experimental validation of an electroactive polymer actuator [Abstract] T2 - Third International Conference on Material Modelling incorporating the Thirteenth European Mechanics of Materials Conference, September 8–11, 2013,Warsaw, Poland Y1 - 2013 SN - 978-83-89687-83-8 IS - 185 PB - Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk CY - Warszawa ER - TY - CHAP A1 - Gaida, Philipp A1 - Jahr, Andreas A1 - Weinberg, Kerstin T1 - Preliminary survey of a diaphragm EAP stack for the use as an actuator in a water valve T2 - 14th International Workshop on Research and Education in Mechatronics 6th-7th June 2013 Y1 - 2013 ER - TY - CHAP A1 - Gaida, Daniel A1 - Wolf, Christian A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Bäck, T. A1 - Bongards, Michael A1 - McLoone, S. T1 - State Estimation for Anaerobic Digesters using the ADM1 T2 - Proceedings of International IWA-Symposium on Anaerobic Digestion of Solid Waste and Energy Crops, Vienna, Austria, 2011 Y1 - 2011 ER - TY - JOUR A1 - Gaida, Daniel A1 - Wolf, Christian A1 - Meyer, C. A1 - Stuhlsatz, André A1 - Lippel, Jens A1 - Bäck, T. A1 - Bongards, Michael A1 - McLoone, S. T1 - State estimation for anaerobic digesters using the ADM1 JF - Water science and technology N2 - The optimization of full-scale biogas plant operation is of great importance to make biomass a competitive source of renewable energy. The implementation of innovative control and optimization algorithms, such as Nonlinear Model Predictive Control, requires an online estimation of operating states of biogas plants. This state estimation allows for optimal control and operating decisions according to the actual state of a plant. In this paper such a state estimator is developed using a calibrated simulation model of a full-scale biogas plant, which is based on the Anaerobic Digestion Model No.1. The use of advanced pattern recognition methods shows that model states can be predicted from basic online measurements such as biogas production, CH4 and CO2 content in the biogas, pH value and substrate feed volume of known substrates. The machine learning methods used are trained and evaluated using synthetic data created with the biogas plant model simulating over a wide range of possible plant operating regions. Results show that the operating state vector of the modelled anaerobic digestion process can be predicted with an overall accuracy of about 90%. This facilitates the application of state-based optimization and control algorithms on full-scale biogas plants and therefore fosters the production of eco-friendly energy from biomass. Y1 - 2012 U6 - https://doi.org/10.2166/wst.2012.286 VL - 66 IS - 5 SP - 1088 EP - 1095 PB - IWA Publishing ER - TY - CHAP A1 - Gaida, Daniel A1 - Stuhlsatz, André A1 - Meier, Hans-Günter ED - Wendemuth, Andreas ED - Meier, Hans-Günter T1 - Fusion of Visual and Inertial Measurements for Pose Estimation T2 - Proceedings of the Workshop on Emotion-, Speech- and Face Recognition with Advanced Classifiers: Düsseldorf, Germany, May 16 - 17, 2008 ; 3rd joined research workshop between Otto-von-Guericke University Magdeburg and the University of Applied Sciences FH Düsseldorf Y1 - 2008 SN - 9783940961242 SP - 39 EP - 48 PB - Otto-von-Guericke University Magdeburg CY - Magdeburg ER - TY - CHAP A1 - Fussenecker, Claudia A1 - Niemann, Jörg A1 - Paul, Alexander A1 - Schlösser, Martin A1 - Schöning, Marius ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Educating Future Engineers – Meeting Challenges at Secondary School and University T2 - Systems, Software and Services Process Improvement Y1 - 2020 SN - 978-3-030-56440-7 U6 - https://doi.org/10.1007/978-3-030-56441-4_56 SP - 742 EP - 753 PB - Springer Nature Switzerland CY - Cham ER - TY - JOUR A1 - Fuchs, H. A1 - Hofzumahaus, A. A1 - Rohrer, F. A1 - Bohn, Birger A1 - Brauers, Theo A1 - Dorn, Hans-Peter A1 - Häseler, R. A1 - Holland, F. A1 - Kaminski, M. A1 - Li, X. A1 - Lu, K. A1 - Nehr, Sascha A1 - Tillmann, R. A1 - Wegener, R. A1 - Wahner, A. T1 - Experimental evidence for efficient hydroxyl radical regeneration in isoprene oxidation JF - Nature Geoscience KW - Luftreinhaltung Y1 - 2013 U6 - https://doi.org/10.1038/NGEO1964 SN - 1752-0894 VL - 6 IS - 12 SP - 1023 EP - 1026 PB - Springer Nature ER - TY - JOUR A1 - Fuchs, H. A1 - Dorn, Hans-Peter A1 - Bachner, M. A1 - Bohn, Birger A1 - Brauers, Theo A1 - Gomm, S. A1 - Hofzumahaus, A. A1 - Holland, F. A1 - Nehr, Sascha A1 - Rohrer, F. A1 - Tillmann, R. A1 - Wahner, A. T1 - Comparison of OH concentration measurements by DOAS and LIF during SAPHIR chamber experiments at high OH reactivity and low NO concentration JF - Atmospheric Measurement Techniques N2 - Abstract. During recent field campaigns, hydroxyl radical (OH) concentrations that were measured by laser-induced fluorescence (LIF) were up to a factor of ten larger than predicted by current chemical models for conditions of high OH reactivity and low NO concentration. These discrepancies, which were observed in forests and urban-influenced rural environments, are so far not entirely understood. In summer 2011, a series of experiments was carried out in the atmosphere simulation chamber SAPHIR in Jülich, Germany, in order to investigate the photochemical degradation of isoprene, methyl-vinyl ketone (MVK), methacrolein (MACR) and aromatic compounds by OH. Conditions were similar to those experienced during the PRIDE-PRD2006 campaign in the Pearl River Delta (PRD), China, in 2006, where a large difference between OH measurements and model predictions was found. During experiments in SAPHIR, OH was simultaneously detected by two independent instruments: LIF and differential optical absorption spectroscopy (DOAS). Because DOAS is an inherently calibration-free technique, DOAS measurements are regarded as a reference standard. The comparison of the two techniques was used to investigate potential artifacts in the LIF measurements for PRD-like conditions of OH reactivities of 10 to 30 s−1 and NO mixing ratios of 0.1 to 0.3 ppbv. The analysis of twenty experiment days shows good agreement. The linear regression of the combined data set (averaged to the DOAS time resolution, 2495 data points) yields a slope of 1.02 ± 0.01 with an intercept of (0.10 ± 0.03) × 106 cm−3 and a linear correlation coefficient of R2 = 0.86. This indicates that the sensitivity of the LIF instrument is well-defined by its calibration procedure. No hints for artifacts are observed for isoprene, MACR, and different aromatic compounds. LIF measurements were approximately 30–40% (median) larger than those by DOAS after MVK (20 ppbv) and toluene (90 ppbv) had been added. However, this discrepancy has a large uncertainty and requires further laboratory investigation. Observed differences between LIF and DOAS measurements are far too small to explain the unexpected high OH concentrations during the PRIDE-PRD2006 campaign. KW - Luftreinhaltung Y1 - 2012 U6 - https://doi.org/10.5194/amt-5-1611-2012 SN - 1867-8548 VL - 5 IS - 7 SP - 1611 EP - 1626 PB - Copernicus ER - TY - JOUR A1 - Fuchs, H. A1 - Bohn, Birger A1 - Hofzumahaus, A. A1 - Holland, F. A1 - Lu, K. D. A1 - Nehr, Sascha A1 - Rohrer, F. A1 - Wahner, A. T1 - Detection of HO2 by laser-induced fluorescence: calibration and interferences from RO2 radicals JF - Atmospheric Measurement Techniques N2 - Abstract. HO2 concentration measurements are widely accomplished by chemical conversion of HO2 to OH including reaction with NO and subsequent detection of OH by laser-induced fluorescence. RO2 radicals can be converted to OH via a similar radical reaction sequence including reaction with NO, so that they are potential interferences for HO2 measurements. Here, the conversion efficiency of various RO2 species to HO2 is investigated. Experiments were conducted with a radical source that produces OH and HO2 by water photolysis at 185 nm, which is frequently used for calibration of LIF instruments. The ratio of HO2 and the sum of OH and HO2 concentrations provided by the radical source was investigated and was found to be 0.50 ± 0.02. RO2 radicals are produced by the reaction of various organic compounds with OH in the radical source. Interferences via chemical conversion from RO2 radicals produced by the reaction of OH with methane and ethane (H-atom abstraction) are negligible consistent with measurements in the past. However, RO2 radicals from OH plus alkene- and aromatic-precursors including isoprene (mainly OH-addition) are detected with a relative sensitivity larger than 80 % with respect to that for HO2 for the configuration of the instrument with which it was operated during field campaigns. Also RO2 from OH plus methyl vinyl ketone and methacrolein exhibit a relative detection sensitivity of 60 %. Thus, previous measurements of HO2 radical concentrations with this instrument were biased in the presence of high RO2 radical concentrations from isoprene, alkenes or aromatics, but were not affected by interferences in remote clean environment with no significant emissions of biogenic VOCs, when the OH reactivity was dominated by small alkanes. By reducing the NO concentration and/or the transport time between NO addition and OH detection, interference from these RO2 species are suppressed to values below 20 % relative to the HO2 detection sensitivity. The HO2 conversion efficiency is also smaller by a factor of four, but this is still sufficient for atmospheric HO2 concentration measurements for a wide range of conditions. KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.5194/amt-4-1209-2011 SN - 1867-8548 VL - 4 IS - 6 SP - 1209 EP - 1225 PB - Copernicus ER - TY - JOUR A1 - Fuchs, H. A1 - Acir, Ismail-Hakki A1 - Bohn, Birger A1 - Brauers, Theo A1 - Dorn, Hans-Peter A1 - Häseler, R. A1 - Hofzumahaus, A. A1 - Holland, F. A1 - Kaminski, M. A1 - Li, X. A1 - Lu, K. A1 - Lutz, A. A1 - Nehr, Sascha A1 - Rohrer, F. A1 - Tillmann, R. A1 - Wegener, R. A1 - Wahner, A. T1 - OH regeneration from methacrolein oxidation investigated in the atmosphere simulation chamber SAPHIR JF - Atmospheric Chemistry and Physics N2 - Abstract. Hydroxyl radicals (OH) are the most important reagent for the oxidation of trace gases in the atmosphere. OH concentrations measured during recent field campaigns in isoprene-rich environments were unexpectedly large. A number of studies showed that unimolecular reactions of organic peroxy radicals (RO2) formed in the initial reaction step of isoprene with OH play an important role for the OH budget in the atmosphere at low mixing ratios of nitrogen monoxide (NO) of less than 100 pptv. It has also been suggested that similar reactions potentially play an important role for RO2 from other compounds. Here, we investigate the oxidation of methacrolein (MACR), one major oxidation product of isoprene, by OH in experiments in the simulation chamber SAPHIR under controlled atmospheric conditions. The experiments show that measured OH concentrations are approximately 50% larger than calculated by the Master Chemical Mechanism (MCM) for conditions of the experiments (NO mixing ratio of 90 pptv). The analysis of the OH budget reveals an OH source that is not accounted for in MCM, which is correlated with the production rate of RO2 radicals from MACR. In order to balance the measured OH destruction rate, 0.77 OH radicals (1σ error: ± 0.31) need to be additionally reformed from each reaction of OH with MACR. The strong correlation of the missing OH source with the production of RO2 radicals is consistent with the concept of OH formation from unimolecular isomerization and decomposition reactions of RO2. The comparison of observations with model calculations gives a lower limit of 0.03 s−1 for the reaction rate constant if the OH source is attributed to an isomerization reaction of MACR-1-OH-2-OO and MACR-2-OH-2-OO formed in the MACR + OH reaction as suggested in the literature (Crounse et al., 2012). This fast isomerization reaction would be a competitor to the reaction of this RO2 species with a minimum of 150 pptv NO. The isomerization reaction would be the dominant reaction pathway for this specific RO2 radical in forested regions, where NO mixing ratios are typically much smaller. KW - Luftreinhaltung Y1 - 2014 U6 - https://doi.org/10.5194/acp-14-7895-2014 SN - 1680-7324 VL - 14 IS - 15 SP - 7895 EP - 7908 PB - Copernicus ER - TY - CHAP A1 - Friedrich, Linus A1 - Ruess, Martin A1 - Schröder, Kai-Uwe T1 - Efficient and robust shell design of space launcher vehicle structures T2 - 57th AIAA/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, San Diego, 4-8 January 2016 Y1 - 2016 UR - https://arc.aiaa.org/doi/book/10.2514/MSDM16 SN - 978-1-62410-392-6 U6 - https://doi.org/10.2514/6.2016-1973 SP - 1 EP - 18 PB - American Institute of Aeronautics and Astronautics CY - Reston ER - TY - CHAP A1 - Friedrich, Linus A1 - Lyssakow, Pawel A1 - Pearce, Garth A1 - Ruess, Martin A1 - Bisagni, Chiara A1 - Schröder, Kai-Uwe ED - Papadrakakis, Manolis ED - Papadopoulos, V. ED - Stefanou, G. ED - Plevris, V. T1 - ON THE STRUCTURAL DESIGN OF IMPERFECTION SENSITIVE LAMINATED COMPOSITE SHELL STRUCTURES SUBJECTED TO AXIAL COMPRESSION T2 - Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 05.06.2016 - 10.06.2016, Crete Island KW - composite shells KW - imperfection sensitivity KW - Shell buckling Y1 - 2016 UR - http://www.eccomasproceedia.org/conferences/eccomas-congresses/eccomas-congress-2016 SN - 978-618-82844-0-1 U6 - https://doi.org/10.7712/100016.1951.5838 SP - 2182 EP - 2189 PB - Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece CY - Athens ER - TY - JOUR A1 - Friedrich, Linus A1 - Loosen, Simon A1 - Liang, Ke A1 - Ruess, Martin A1 - Bisagni, Chiara A1 - Schröder, Kai-Uwe T1 - Stacking sequence influence on imperfection sensitivity of cylindrical composite shells under axial compression JF - Composite Structures Y1 - 2015 U6 - https://doi.org/10.1016/j.compstruct.2015.08.132 SN - 0263-8223 VL - 134 SP - 750 EP - 761 PB - Elsevier ER - TY - CHAP A1 - Franz, Thomas A1 - Staab, Steffen A1 - Arndt, Richard ED - Sleeman, Derek ED - Barker, Ken T1 - The X-COSIM integration framework for a seamless semantic desktop T2 - Proceedings of the 4th international conference on Knowledge capture Y1 - 2007 SN - 978-1-59593-643-1 U6 - https://doi.org/10.1145/1298406.1298433 N1 - Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. To copy otherwise, to republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee PB - ACM CY - New York, NY ER - TY - CHAP A1 - Franz, Thomas A1 - Staab, Steffen ED - Decker, Stefan ED - Park, Jack ED - Quan, Dennis ED - Sauermann, Leo T1 - SAM: Semantics Aware Instant Messaging for the Networked Semantic Desktop. revised and extended version T2 - Proceedings of the 1st Workshop On The Semantic Desktop. 4th International Semantic Web Conference Y1 - 2005 UR - http://www.thomas-franz.de/publications/franzstaab-sam.pdf N1 - This work is conducted with respect to the upcoming project Knowledge Sharing and Reuse across Media (X-Media), funded by the Information Society Technologies (IST) 6th Framework Programme. SP - 1 EP - 15 CY - Galway ER - TY - CHAP A1 - Franz, Thomas A1 - Sizov, Sergej ED - Rech, Jörg ED - Decker, Björn ED - Ras, Eric T1 - Communication Systems for Semantic Work Environments T2 - Emerging Technologies for Semantic Work Environments Y1 - 2008 UR - http://www.thomas-franz.de/publications/comm-for-swe.pdf U6 - https://doi.org/10.4018/978-1-59904-877-2.ch002 SP - 16 EP - 32 PB - IGI Global CY - Hershey ER - TY - CHAP A1 - Franz, Thomas A1 - Schultz, Antje A1 - Sizov, Sergej A1 - Staab, Steffen ED - Hutchison, David ED - Kanade, Takeo ED - Kittler, Josef ED - Kleinberg, Jon M. ED - Mattern, Friedemann ED - Mitchell, John C. ED - Naor, Moni ED - Nierstrasz, Oscar ED - Pandu Rangan, C. ED - Steffen, Bernhard ED - Sudan, Madhu ED - Terzopoulos, Demetri ED - Tygar, Doug ED - Vardi, Moshe Y. ED - Weikum, Gerhard ED - Bernstein, Abraham ED - Karger, David R. ED - Heath, Tom ED - Feigenbaum, Lee ED - Maynard, Diana ED - Motta, Enrico ED - Thirunarayan, Krishnaprasad T1 - TripleRank: Ranking Semantic Web Data by Tensor Decomposition T2 - The Semantic Web - ISWC 2009: 8th International Semantic Web Conference, ISWC 2009, Chantilly, VA, USA, October 25-29, 2009. Proceedings Y1 - 2009 UR - http://www.thomas-franz.de/publications/triplerank-iswc.pdf U6 - https://doi.org/10.1007/978-3-642-04930-9_14 VL - Lecture Notes in Computer Science, 5823 SP - 213 EP - 228 PB - Springer CY - Berlin, Heidelberg ER - TY - RPRT A1 - Franz, Thomas A1 - Scherp, Ansgar A1 - Staab, Steffen T1 - Does a Semantic Desktop Facilitate Your Daily Tasks? T2 - Arbeitsberichte aus dem Bereich Informatik Y1 - 2008 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kola-2564 UR - https://nbn-resolving.org/urn:nbn:de:kola-2564 SN - 1864-0850 PB - Universität Koblenz-Landau CY - Koblenz ER - TY - CHAP A1 - Franz, Thomas A1 - Saathoff, Carsten A1 - Görlitz, Olaf A1 - Ringelstein, Christoph A1 - Staab, Steffen T1 - SEA: Introducing the Semantic Exchange Architecture T2 - Demos and Posters of the 3rd European Semantic Web Conference (ESWC 2006), Budva, Montenegro, 11th - 14th June, 2006 KW - Poster Y1 - 2006 U6 - http://nbn-resolving.de/urn/resolver.pl?Poster UR - https://www.eswc2006.org/poster-papers/FP19-Franz.pdf CY - Budva ER - TY - CHAP A1 - Franz, Thomas A1 - Saathoff, Carsten A1 - Gorlitz, Olaf A1 - Ringelstein, Christoph A1 - Staab, Steffen T1 - SEA: A Lightweight and Extensible Semantic Exchange Architecture T2 - 2nd Workshop on Innovations in Web Infrastructure. 15th International World Wide Web Conference, Edinburgh, Scotland Y1 - 2006 UR - https://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.96.1639&rep=rep1&type=pdf SP - 1 EP - 7 CY - Edinburgh ER - TY - CHAP A1 - Franz, Thomas A1 - Koch, Jörg A1 - Dividino, Renata A1 - Staab, Steffen T1 - LENA-TR: Browsing Linked Open Data Along Knowledge-Aspects T2 - Linked data meets artificial intelligence : papers from the AAAI spring symposium ; [held March 22 - 24, 2010 at Stanford University, Stanford, California USA] Y1 - 2010 UR - http://www.thomas-franz.de/publications/lena-tr.pdf SN - 978-1-57735-461-1 SP - 46 EP - 51 PB - AAAI Press CY - Menlo Park ER - TY - CHAP A1 - Franz, Thomas A1 - Dellschaft, Klaas A1 - Staab, Steffen ED - Domingue, John ED - Fensel, Dieter ED - Traverso, Paolo T1 - Unlock Your Data: The Case of MyTag T2 - Future Internet – FIS 2008: First Future Internet Symposium, FIS 2008 Vienna, Austria, September 29-30, 2008. Revised Selected Papers Y1 - 2009 UR - http://www.thomas-franz.de/publications/fis-mytag.pdf U6 - https://doi.org/10.1007/978-3-642-00985-3_10 VL - Lecture Notes in Computer Science, 5468 SP - 117 EP - 129 PB - Springer CY - Berlin, Heidelberg ER - TY - JOUR A1 - Franz, Thomas A1 - Davis, Steve T1 - Designing a Web-Based System For Managing a Supply Network JF - Issues in Information Systems Y1 - 2004 UR - http://www.thomas-franz.de/publications/FranzDavis-iacis.pdf SN - 1529-7314 VL - V IS - 2 SP - 447 EP - 453 ER - TY - CHAP A1 - Franz, Thomas A1 - Ansgar, Scherp A1 - Staab, Steffen ED - Gil, Yolanda T1 - Are semantic desktops better? T2 - Proceedings of the Fifth International Conference on Knowledge Capture, September 1 - 4, 2009, Redondo Beach, California, USA Y1 - 2009 UR - http://www.thomas-franz.de/publications/x-cosim-eval-k-cap.pdf SN - 978-1-60558-658-8 U6 - https://doi.org/10.1145/1597735.1597737 SP - 1 EP - 8 PB - Association for Computing Machinery CY - New York, NY ER - TY - THES A1 - Franz, Thomas T1 - Design and Prototypical Implementation of a Platform for Personalized Recommender Systems Y1 - 2005 CY - Freiburg ER - TY - CHAP A1 - Franz, Thomas T1 - On the Evaluation of Personal Knowledge Management Solutions: Evaluating Tools of the X-COSIM Semantic Desktop T2 - LWA 2008 - Workshop-Woche: Lernen, Wissen & Adaptivität, Würzburg, 6.-8. Oktober 2008, Proceedings Y1 - 2008 UR - http://www.thomas-franz.de/publications/x-cosim-lwa.pdf SP - 15 EP - 22 CY - Würzburg ER - TY - THES A1 - Franz, Thomas T1 - Semantic Personal Information Management BT - Zugl.: Koblenz, Univ., Diss., 2010 Y1 - 2010 SN - 978-3-86853-706-2 PB - Universität Koblenz-Landau CY - München ER - TY - JOUR A1 - Franz, Jürgen T1 - Benefits of Communication Methods in Environmental Protection JF - IETE Technical Review Y1 - 1996 U6 - https://doi.org/10.1080/02564602.1996.11416600 VL - 13 IS - 3 SP - 153 EP - 162 PB - Taylor & Francis ER - TY - JOUR A1 - Frank, Lena A1 - Rödder, Maximilian A1 - Neef, Matthias A1 - Adam, Mario T1 - Heating, Ventilation, Domestic Appliances – an Energy Integrated System Concept for the Household of the Future JF - Energy Y1 - 2021 U6 - https://doi.org/10.1016/j.energy.2021.121303 SN - 0360-5442 VL - 234 PB - Elsevier ER - TY - CHAP A1 - Fomin, A.S. A1 - Kiselev, S.V. A1 - Jahr, Andreas A1 - Sim, H. T1 - Development of the Kinematic Model of Horizontal-Set Drive for Blades of Combine Harvester Thresher T2 - Materialien zum wissenschaftlichen Seminar der Stipendiaten der Programme «Michail Lomonosov» und «Immanuel Kant» 2015/2016 Y1 - 2017 IS - 12 SP - 188 EP - 196 ER - TY - JOUR A1 - Fleiger, P. M. A1 - Reichardt, Roland A1 - Treiber, K. T1 - High-Precision Power Measurement for the Grindability Test According to Zeisel JF - Chemical Engineering & Technology Y1 - 2012 U6 - https://doi.org/10.1002/ceat.201200118 VL - 35 IS - 11 SP - 1941 EP - 1948 PB - Wiley ER - TY - CHAP A1 - Flasko, Matthias A1 - Pogscheba, Patrick A1 - Herder, Jens A1 - Vonolfen, Wolfgang T1 - Heterogeneous binocular camera-tracking in a Virtual Studio T2 - 8. Workshop Virtuelle und Erweiterte Realität der GI-Fachgruppe VR/AR N2 - This paper presents a tracking of parts of a human body in a virtual TV studio environment. The tracking is based on a depth camera and a HD studio camera and aims at a realistic interaction between the actor and the computer generated environment. Stereo calibration methods are used to match corresponding pixels of both cameras (HD color and depth image). Hence the images were rectified and column aligned. The disparity is used to correct the depth image pixel by pixel. This image registration results in row and column aligned images where ghost regions are in the depth image resulting from occlusion. Both images are used to generate foreground masks with chroma and depth keying. The color image is taken for skin color segmentation to determine and distinguish the actor’s hands and face. In the depth image the flesh colored regions were used to determine their spatial position. The extracted positions were augmented by virtual objects. The scene is rendered correctly with virtual camera parameters which were calculated from the camera calibration parameters. Generated computer graphics with alpha value are combined with the HD color images. This compositing shows interaction with augmented objects for verification. The additional depth information results in changing the size of objects next to the hands when the actor moves around. KW - virtual studio KW - camera-tracking KW - VSVR Y1 - 2011 CY - Wedel ER - TY - JOUR A1 - Fischer, Peter C. A1 - Fassbach, Burkhard T1 - Guest Post: The German D&O Procurement Clause Revisited JF - The D&O Diary: A Periodic Journal Containing Items of Interest From the World of Directors & Officers Liability, With Occasional Commentary KW - Organhaftung KW - Vorstandsmitglied Y1 - 2024 UR - https://web.archive.org/web/20250417174603/https://www.dandodiary.com/2024/05/articles/d-o-insurance/guest-post-the-german-do-procurement-clause-revisited/ ER - TY - CHAP A1 - Fischer, C. A1 - Pohl, T. A1 - Weber, Konradin A1 - Vogel, A. A1 - van Haren, G. A1 - Schweikert, W. ED - Lewis, Colin ED - Burgess, Douglas T1 - TATP stand-off detection with open path: FTIR techniques T2 - Optics and photonics for counterterrorism, crime fighting and defence VIII : 24 - 26 September 2012, Edinburgh, United Kingdom KW - Luftreinhaltung Y1 - 2012 SN - 978-0-8194-9287-6 U6 - https://doi.org/10.1117/12.974592 SN - 0277-786X VL - 8546 PB - SPIE CY - Bellingham, Wash ER - TY - CHAP A1 - Fiedler, Jannik A1 - Rilling, Stefan A1 - Bogen, Manfred A1 - Herder, Jens ED - Braz, José T1 - Multimodal interaction techniques in scientific data visualization: An analytical survey T2 - In Proceedings of the 10th International Conference on Computer Graphics Theory and Applications (GRAPP-2015) N2 - The interpretation process of complex data sets makes the integration of effective interaction techniques crucial. Recent work in the field of human-computer interaction has shown that there is strong evidence that multimodal user interaction, i.e. the integration of various input modalities and interaction techniques into one comprehensive user interface, can improve human performance when interacting with complex data sets. However, it is still unclear which factors make these user interfaces superior to unimodal user interfaces. The contribution of this work is an analytical comparison of a multimodal and a unimodal user interface for a scientific visualization application. We show that multimodal user interaction with simultaneously integrated speech and gesture input improves user performance regarding efficiency and ease of use. KW - Interaction KW - Mulitmodal KW - Interaction Techniques KW - 3-D Interaction KW - Immersive Environments KW - VSVR Y1 - 2015 SN - 978-989-758-087-1 U6 - https://doi.org/10.5220/0005296404310437 SP - 431 EP - 437 PB - SCITEPRESS CY - s. l. ER - TY - JOUR A1 - Feseker, Daniel A1 - Kinell, Mats A1 - Neef, Matthias T1 - Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow JF - Journal of Turbomachinery N2 - The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties. KW - Compressor KW - Gas turbine engines KW - Turbine components KW - Boundary layer development KW - Fluid dynamics KW - Heat transfer KW - Measurement techniques KW - Film cooling KW - Heat transfer phenomena Y1 - 2018 U6 - https://doi.org/10.1115/1.4039842 VL - 140 IS - 7 CY - ASME ER - TY - CHAP A1 - Feseker, Daniel A1 - Kinell, Mats A1 - Neef, Matthias ED - The American Society of Mechanical Engineers, T1 - Experimental Study on Pressure Losses in Circular Orifices With Inlet Cross Flow T2 - Proceedings of the ASME Turbo Expo: Turbine Technical Conference and Exposition - 2017: presented at the ASME Turbo Expo 2017: Turbine Technical Conference and Exposition, June 26-30, 2017 N2 - The ability to understand and predict the pressure losses of orifices is important in order to improve the air flow within the secondary air system. This experimental study investigates the behavior of the discharge coefficient for circular orifices with inlet cross flow which is a common flow case in gas turbines. Examples of this are at the inlet of a film cooling hole or the feeding of air to a blade through an orifice in a rotor disk. Measurements were conducted for a total number of 38 orifices, covering a wide range of length-to-diameter ratios, including short and long orifices with varying inlet geometries. Up to five different chamfer-to-diameter and radius-to-diameter ratios were tested per orifice length. Furthermore, the static pressure ratio across the orifice was varied between 1.05 and 1.6 for all examined orifices. The results of this comprehensive investigation demonstrate the beneficial influence of rounded inlet geometries and the ability to decrease pressure losses, which is especially true for higher cross flow ratios where the reduction of the pressure loss in comparison to sharp-edged holes can be as high as 54%. With some exceptions, the chamfered orifices show a similar behavior as the rounded ones but with generally lower discharge coefficients. Nevertheless, a chamfered inlet yields lower pressure losses than a sharp-edged inlet. The obtained experimental data were used to develop two correlations for the discharge coefficient as a function of geometrical as well as flow properties. Y1 - 2017 UR - https://asmedigitalcollection.asme.org/GT/proceedings/GT2017/50886/Charlotte, North Carolina, USA/241903 SN - 978-0-7918-5088-6 U6 - https://doi.org/10.1115/GT2017-64143 PB - The American Society of Mechanical Engineers CY - New York ER - TY - CHAP A1 - Feitsch, Jochen A1 - Strobel, Marco A1 - Meyer, Stefan A1 - Geiger, Christian ED - Butz, Andreas ED - Greenberg, Saul ED - Bakker, Saskia ED - Loke, Lian ED - de Luca, Alexander T1 - Tangible and body-related interaction techniques for a singing voice synthesis installation T2 - Proceedings of the 8th International Conference on Tangible, Embedded and Embodied Interaction - TEI '14, 16.02.2014 - 19.02.2014, Munich Y1 - 2013 UR - http://dl.acm.org/citation.cfm?doid=2540930 SN - 9781450326353 U6 - https://doi.org/10.1145/2540930.2540962 SP - 157 EP - 164 PB - ACM Press CY - New York ER - TY - CHAP A1 - Feitsch, Jochen A1 - Strobel, Marco A1 - Geiger, Christian ED - Schmidt, Albrecht ED - Bulling, Andreas ED - Holz, Christian T1 - Caruso: augmenting users with a tenor's voice T2 - Proceedings of the 4th Augmented Human International Conference on - AH '13, 07.03.2013 - 08.03.2013, Stuttgart Y1 - 2013 UR - http://dl.acm.org/citation.cfm?doid=2459236 SN - 9781450319041 U6 - https://doi.org/10.1145/2459236.2459280 SP - 239 EP - 240 PB - ACM Press CY - New York ER - TY - CHAP A1 - Feitsch, Jochen A1 - Strobel, Marco A1 - Geiger, Christian ED - Reidsma, Dennis ED - Katayose, Haruhiro ED - Nijholt, Anton T1 - Singing Like a Tenor without a Real Voice T2 - Advances in Computer Entertainment. 10th International Conference, ACE 2013, Boekelo, The Netherlands, November 12-15, 2013. Proceedings Y1 - 2013 SN - 978-3-319-03160-6 U6 - https://doi.org/10.1007/978-3-319-03161-3_18 VL - 8253 SP - 258 EP - 269 PB - Springer International Publishing CY - Cham ER - TY - CHAP A1 - Feistel, Stefan A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Using High-Resolution Directivity Data of Musical Instruments for Acoustic Simulation and Auralization T2 - Proceedings of the 155th Audio Engineering Society Conventio, New York, 25-27th of October 2023. Y1 - 2023 PB - Audio Engineering Society ER - TY - JOUR A1 - Farooq, Asma A1 - Ali, Ramzan A1 - Benim, Ali Cemal T1 - Soret and Dufour effects on three dimensional Oldroyd-B fluid JF - Physica A: Statistical Mechanics and its Applications Y1 - 2018 U6 - https://doi.org/10.1016/j.physa.2018.02.204 SN - 0378-4371 VL - 503 SP - 345 EP - 354 PB - Elsevier ER - TY - JOUR A1 - Fabian, Benjamin A1 - Gürses, Seda A1 - Heisel, Maritta A1 - Santen, Thomas A1 - Schmidt, Holger T1 - A comparison of security requirements engineering methods JF - Requirements Engineering N2 - This paper presents a conceptual framework for security engineering, with a strong focus on security requirements elicitation and analysis. This conceptual framework establishes a clear-cut vocabulary and makes explicit the interrelations between the different concepts and notions used in security engineering. Further, we apply our conceptual framework to compare and evaluate current security requirements engineering approaches, such as the Common Criteria, Secure Tropos, SREP, MSRA, as well as methods based on UML and problem frames. We review these methods and assess them according to different criteria, such as the general approach and scope of the method, its validation, and quality assurance capabilities. Finally, we discuss how these methods are related to the conceptual framework and to one another. KW - security requirement KW - security requirement engineering KW - comparison KW - security Y1 - 2010 UR - https://link.springer.com/article/10.1007/s00766-009-0092-x U6 - https://doi.org/10.1007/s00766-009-0092-x SN - 0947-3602 N1 - Sie haben Zugriff auf den Volltext innerhalb des HSD Campus. VL - 15 IS - 1 SP - 7 EP - 40 PB - Springer CY - Wiesbaden ER - TY - CHAP A1 - Faber, Christian A1 - Anthrakidis, Anette A1 - Lanz, Marco A1 - Rusack, Markus A1 - Weis, Fabian A1 - Adam, Mario A1 - Schramm, Sebastian T1 - Barriers to solar process heat applications, T2 - SWC 2011: ISES Solar World Congress, 28 August - 2 September 2011, Kassel, Germany KW - Solare-Prozesswärme-Standards Y1 - 2011 UR - https://proceedings.ises.org/swc2011/proceedings/PDF/Papers.pdf SP - 1326 EP - 1334 CY - Kassel ER - TY - CHAP A1 - Eversheim, Walter A1 - Deckert, Carsten A1 - Westekemper, Markus T1 - Increasing Efficiency through Integration of Freeform-Features into the CAD/CAM Chain T2 - Product Data Technology Europe 2000 Y1 - 2000 SP - 355 EP - 362 ER - TY - JOUR A1 - Eurich, Bernhard A1 - Klenzner, Thomas A1 - Oehler, Michael T1 - Impact of room acoustic parameters on speech and music perception among participants with cochlear implants JF - Hearing research Y1 - 2019 U6 - https://doi.org/10.1016/j.heares.2019.03.012 VL - 377 SP - 122 EP - 132 PB - Elsevier ER - TY - CHAP A1 - Erdmann, Matthias A1 - Versümer, Siegbert A1 - Steffens, Jochen T1 - Advanced Soundscape Search: A Web Application for Interactive Exploration of ISO 12913 Datasets [Vortrag] T2 - Fortschritte der Akustik - DAGA 2024, 18. - 21. März 2024, Hannover N2 - The development of the ISO 12913 has led to the creation of standardized methodologies for collecting and analyzing individual responses regarding acoustic environments in context, with the aim of enabling comparability, replicability, and the development of modelling algorithms in soundscape prediction and design tasks. The development of methods to represent and explore soundscape data has the potential to facilitate deeper insights into different datasets. Although it is unlikely that any single method will sufficiently capture all information in empirical studies, attempts are worthwhile to facilitate advancements in this realm. Therefore, we propose a web application that fosters an interactive exploration of datasets based on the ISO 12913. The application facilitates a comprehensive soundscape search using the 8 items of the standard, 8 features characterizing the soundscape (e.g., intensities of natural, human, and technical sound sources heard), and 10 distinct acoustic features. The search encompasses all possible combinations of these components, thus facilitating detailed exploration, offering an in-depth dataset overview, and enabling the comparison of different datasets. Further functionalities include text searching and the option to download, save, and load selected soundscapes, enhancing control and flexibility in the design of empirical studies and supporting urban planners in understanding various soundscape items. Y1 - 2024 UR - https://pub.dega-akustik.de/DAGA_2024/files/upload/paper/336.pdf SN - 978-3-939296-22-5 SP - 1417 EP - 1420 PB - Deutsche Gesellschaft für Akustik e.V. CY - Berlin ER - TY - JOUR A1 - Epple, Bernd A1 - Fiveland, Woody A1 - Krohmer, Bernd A1 - Richards, Galen A1 - Benim, Ali Cemal T1 - Assessment of two-phase flow models for the simulation of pulverized coald combustion JF - Clean Air: International Journal on Energy for a Clean Environment KW - Numerische Strömungssimulation KW - Kohle KW - Verbrennung KW - Zweiphasenströmung Y1 - 2005 U6 - https://doi.org/10.1615/InterJEnerCleanEnv.v6.i3.50 SN - 1561-4417 VL - 6 IS - 3 SP - 267 EP - 287 PB - Begell House ER - TY - JOUR A1 - Epple, B. A1 - Benim, Ali Cemal T1 - A CRFD study of supercritical 2 x 900 MW boilers for Shanghai, P.R. of China JF - Progress in Computational Fluid Dynamics KW - Numerische Strömungssimulation KW - Kohlekraftwerk Y1 - 2003 U6 - https://doi.org/10.1504/PCFD.2003.003772 SN - 1468-4349 VL - 3 IS - 2-4 SP - 140 EP - 144 PB - Inderscience ER - TY - JOUR A1 - Engeldahl, Barthel A1 - Özaslan, Mehtap A1 - Marschall, Roland A1 - Rose, Marcus A1 - Kaluza, Stefan A1 - Titus, Juliane A1 - Sprung, Christoph T1 - Weimar 2015: Catalysing Tomorrow’s Solutions JF - ChemCatChem Y1 - 2015 U6 - https://doi.org/10.1002/cctc.201500435 SN - 1867-3899 VL - 7 IS - 12 SP - 1794 EP - 1796 PB - Wiley ER - TY - JOUR A1 - Engel, Rebecca V. A1 - Kaluza, Stefan A1 - Oezaslan, Mehtap A1 - Peitz, Stephan T1 - German Catalysis Meeting - 50 Years and as Young as Ever JF - ChemCatChem Y1 - 2017 U6 - https://doi.org/10.1002/cctc.201700683 SN - 1867-3899 VL - 9 IS - 11 SP - 2018 EP - 2020 PB - Wiley ER - TY - JOUR A1 - Emanuelsson, E. U. A1 - Hallquist, M. A1 - Kristensen, K. A1 - Glasius, M. A1 - Bohn, Birger A1 - Fuchs, H. A1 - Kammer, B. A1 - Kiendler-Scharr, A. A1 - Nehr, Sascha A1 - Rubach, F. A1 - Tillmann, R. A1 - Wahner, A. A1 - Wu, H.-C. A1 - Mentel, Th. F. T1 - Formation of anthropogenic secondary organic aerosol (SOA) and its influence on biogenic SOA properties JF - Atmospheric Chemistry and Physics N2 - Abstract. Secondary organic aerosol (SOA) formation from mixed anthropogenic and biogenic precursors has been studied exposing reaction mixtures to natural sunlight in the SAPHIR chamber in Jülich, Germany. In this study aromatic compounds served as examples of anthropogenic volatile organic compound (VOC) and a mixture of α-pinene and limonene as an example for biogenic VOC. Several experiments with exclusively aromatic precursors were performed to establish a relationship between yield and organic aerosol mass loading for the atmospheric relevant range of aerosol loads of 0.01 to 10 μg m−3. The yields (0.5 to 9%) were comparable to previous data and further used for the detailed evaluation of the mixed biogenic and anthropogenic experiments. For the mixed experiments a number of different oxidation schemes were addressed. The reactivity, the sequence of addition, and the amount of the precursors influenced the SOA properties. Monoterpene oxidation products, including carboxylic acids and dimer esters were identified in the aged aerosol at levels comparable to ambient air. OH radicals were measured by Laser Induced Fluorescence, which allowed for establishing relations of aerosol properties and composition to the experimental OH dose. Furthermore, the OH measurements in combination with the derived yields for aromatic SOA enabled application of a simplified model to calculate the chemical turnover of the aromatic precursor and corresponding anthropogenic contribution to the mixed aerosol. The estimated anthropogenic contributions were ranging from small (≈8%) up to significant fraction (50%) providing a suitable range to study the effect of aerosol composition on the aerosol volatility (volume fraction remaining (VFR) at 343 K: 0.86–0.94). The aromatic aerosol had higher oxygen to carbon ratio O/C and was less volatile than the biogenic fraction. However, in order to produce significant amount of aromatic SOA the reaction mixtures needed a higher OH dose that also increased O/C and provided a less volatile aerosol. The SOA yields, O/C, and f44 (the mass fraction of CO2+ ions in the mass spectra which can be considered as a measure of carboxylic groups) in the mixed photo-chemical experiments could be described as linear combinations of the corresponding properties of the pure systems. For VFR there was in addition an enhancement effect, making the mixed aerosol significantly less volatile than what could be predicted from the pure systems. A strong positive correlation was found between changes in volatility and O/C with the exception during dark hours where the SOA volatility decreased while O/C did not change significantly. Thus, this change in volatility under dark conditions as well as the anthropogenic enhancement is due to chemical or morphological changes not affecting O/C. KW - Luftreinhaltung Y1 - 2013 U6 - https://doi.org/10.5194/acp-13-2837-2013 SN - 1680-7324 VL - 13 IS - 5 SP - 2837 EP - 2855 PB - Copernicus ER - TY - JOUR A1 - Elíasson, Jónas A1 - Palsson, Asgeir A1 - Weber, Konradin T1 - Monitoring ash clouds for aviation JF - Nature KW - Luftreinhaltung Y1 - 2011 U6 - https://doi.org/10.1038/475455b VL - 475 IS - 7357 PB - Springer Nature ER - TY - CHAP A1 - Elvers, Paul A1 - Steffens, Jochen T1 - How empowering music influences performance and risk-behavior in sports: a randomized controlled trial T2 - Proceedings of the Congress of the International Association of Empirical Aesthetics (Wien, Österreich) Y1 - 2016 CY - Wien ER - TY - CHAP A1 - Elvers, Paul A1 - Steffens, Jochen ED - Goschke, Thomas ED - Bolte, Annette ED - Kirschbaum, Clemens T1 - The influence of motivational music on risk-behavior and ball-throwing performance T2 - TeaP 2017: Abstracts of the 59th Conference of Experimental Psychologists : Dresden, Germany, March 26-29, 2017 Y1 - 2017 SN - 978-3958532946 PB - Pabst Science Publishers CY - Lengerich ER - TY - JOUR A1 - Elvers, Paul A1 - Steffens, Jochen T1 - The Sound of Success: Investigating Cognitive and Behavioral Effects of Motivational Music in Sports JF - Frontiers in psychology N2 - Listening to music before, during, or after sports is a common phenomenon, yet its functions and effects on performance, cognition, and behavior remain to be investigated. Listening to music before, during, or after sports is a common phenomenon, yet its functions and effects on performance, cognition, and behavior remain to be investigated. In this study we present a novel approach to the role of music in sports and exercise that focuses on the notion of musical self-enhancement (Elvers, 2016). We derived the following hypotheses from this framework: listening to motivational music will (i) enhance self-evaluative cognition, (ii) improve performance in a ball game, and (iii) evoke greater risk-taking behavior. To evaluate the hypotheses, we conducted a between-groups experiment (N = 150) testing the effectiveness of both an experimenter playlist and a participant-selected playlist in comparison to a no-music control condition. All participants performed a ball-throwing task developed by Decharms and Davé (1965), consisting of two parts: First, participants threw the ball from fixed distances into a funnel basket. During this task, performance was measured. In the second part, the participants themselves chose distances from the basket, which allowed their risk-taking behavior to be assessed. The results indicate that listening to motivational music led to greater risk taking but did not improve ball-throwing performance. This effect was more pronounced in male participants and among those who listened to their own playlists. Furthermore, self-selected music enhanced state self-esteem in participants who were performing well but not in those who were performing poorly. We also discuss further implications for the notion of musical self-enhancement. // Listening to music before, during, or after sports is a common phenomenon, yet its functions and effects on performance, cognition, and behavior remain to be investigated. In this study we present a novel approach to the role of music in sports and exercise that focuses on the notion of musical self-enhancement (Elvers, 2016). We derived the following hypotheses from this framework: listening to motivational music will (i) enhance self-evaluative cognition, (ii) improve performance in a ball game, and (iii) evoke greater risk-taking behavior. To evaluate the hypotheses, we conducted a between-groups experiment (N = 150) testing the effectiveness of both an experimenter playlist and a participant-selected playlist in comparison to a no-music control condition. All participants performed a ball-throwing task developed by Decharms and Davé (1965), consisting of two parts: First, participants threw the ball from fixed distances into a funnel basket. During this task, performance was measured. In the second part, the participants themselves chose distances from the basket, which allowed their risk-taking behavior to be assessed. The results indicate that listening to motivational music led to greater risk taking but did not improve ball-throwing performance. This effect was more pronounced in male participants and among those who listened to their own playlists. Furthermore, self-selected music enhanced state self-esteem in participants who were performing well but not in those who were performing poorly. We also discuss further implications for the notion of musical self-enhancement. KW - Motivation KW - motor coordination KW - Music KW - risk taking KW - self-enhancement KW - Self-esteem KW - sports Y1 - 2017 U6 - https://doi.org/10.3389/fpsyg.2017.02026 VL - 8 PB - Frontiers ER - TY - CHAP A1 - Elvers, Paul A1 - Fischinger, Timo A1 - Steffens, Jochen ED - Ginsborg, Jane ED - Lamont, Alexandra T1 - Empowering music - music-induced manipulations of self-esteem T2 - Proceedings of the Ninth Triennial Conference of the European Society for the Cognitive Sciences of Music (ESCOM), CD-ROM Y1 - 2015 CY - Manchester ER - TY - JOUR A1 - Elvers, Paul A1 - Fischinger, Timo A1 - Steffens, Jochen T1 - Music listening as self-enhancement JF - Psychology of Music KW - Habilitation Y1 - 2018 U6 - https://doi.org/10.1177/0305735617707354 VL - 10 IS - 2 SP - 1 EP - 19 PB - Sage ER - TY - JOUR A1 - Eliasson, Jonas A1 - Yasuda, Nario A1 - Weber, Konradin A1 - Vogel, Andreas A1 - Palsson, Thorgeir T1 - The role of in-situ measurements of volcanic ash concentrations in preventing economic disasters due to volcanic ash clouds JF - Journal of Integrated Disaster Risk Management KW - Luftreinhaltung Y1 - 2014 UR - https://www.idrimjournal.com/article/11691-the-role-of-in-situ-measurements-of-volcanic-ash-concentrations-in-preventing-economic-disasters-due-to-volcanic-ash-clouds U6 - https://doi.org/10.5595/idrim.2014.0092 SN - 2185-8322 VL - 4 IS - 1 SP - 48 EP - 60 PB - Journal of Integrated Disaster Risk Management ER - TY - CHAP A1 - Eliasson, Jonas A1 - Palsson, Thorgeir A1 - Weber, Konradin T1 - State of volcanic ash dispersion prediction T2 - Geophysical Research Abstracts: EGU General Assembly 2017 N2 - The Eyjafjallajokull 2010 and Grimsvotn 2011 eruptions created great problems for commercial aviation in Western Europe and in the North Atlantic region. Comparison of satellite images of the visible and predicted ash clouds showed the VAAC prediction to be much larger than the actual ash clouds. No official explanation of this discrepancy exists apart from the definition of the ash cloud boundary. Papers on simulation of the Eyjafjallajökull ash cloud in peer reviewed journals, typically attempted to simulate the VAAC predictions rather than focusing on the satellite pictures. Sporadic measurements made in-situ showed much lower ash concentrations over Europe than the predicted values. Two of the weak points in ash cloud prediction have been studied in airborne measurements of volcanic ash by the Universities in Kyoto Japan, Iceland and Düsseldorf Germany of eruptions in Sakurajima, Japan. It turns out that gravitational deformation of the plume and a streak fallout process make estimated ash content of clouds larger than the actual, both features are not included in the simulation model. Tropospheric plumes tend to ride in stable inversions this causes gravitational flattening (pancaking) of the volcanic plume, while diffusion in the mixing layer is insignificant. New rules from ICAO, effective from November 2014, reiterate that jetliners should avoid visible ash, this makes information on visible ash important. A procedure developed by JMA′s Tokyo VAAC uses satellite images of visible ash to correct the prediction. This and the fact that meteorological data necessary to model gravitational dispersion and streak fallout do not exist in the international database available to the VAAC′s. This shows that close monitoring by airborne measurements and satellite and other photographic surveillance is necessary. KW - Luftreinhaltung KW - Vulkanismus KW - Vulkanasche KW - Luftfahrt KW - Messtechnik Y1 - 2017 UR - https://web.archive.org/web/20220725214514/https://meetingorganizer.copernicus.org/EGU2017/EGU2017-13656.pdf PB - Copernicus CY - Göttingen ER - TY - CHAP A1 - Eliasson, J. A1 - Watson, I.M. A1 - Weber, Konradin T1 - In Situ Observations of Airborne Ash From Manned Aircraft T2 - Volcanic Ash KW - Luftreinhaltung Y1 - 2016 SN - 9780081004050 U6 - https://doi.org/10.1016/B978-0-08-100405-0.00009-4 SP - 89 EP - 98 PB - Elsevier ER - TY - JOUR A1 - Elhaddad, Mohamed A1 - Zander, Nils A1 - Bog, Tino A1 - Kudela, László A1 - Kollmannsberger, Stefan A1 - Kirschke, Jan A1 - Baum, Thomas A1 - Ruess, Martin A1 - Rank, Ernst T1 - Multi-level hp-finite cell method for embedded interface problems with application in biomechanics JF - International Journal for Numerical Methods in Biomedical Engineering N2 - This work presents a numerical discretization technique for solving 3-dimensional material interface problems involving complex geometry without conforming mesh generation. The finite cell method (FCM), which is a high-order fictitious domain approach, is used for the numerical approximation of the solution without a boundary-conforming mesh. Weak discontinuities at material interfaces are resolved by using separate FCM meshes for each material sub-domain and weakly enforcing the interface conditions between the different meshes. Additionally, a recently developed hierarchical hp-refinement scheme is used to locally refine the FCM meshes to resolve singularities and local solution features at the interfaces. Thereby, higher convergence rates are achievable for nonsmooth problems. A series of numerical experiments with 2- and 3-dimensional benchmark problems is presented, showing that the proposed hp-refinement scheme in conjunction with the weak enforcement of the interface conditions leads to a significant improvement of the convergence rates, even in the presence of singularities. Finally, the proposed technique is applied to simulate a vertebra-implant model. The application showcases the method's potential as an accurate simulation tool for biomechanical problems involving complex geometry, and it demonstrates its flexibility in dealing with different types of geometric description. Y1 - 2018 UR - http://www.ncbi.nlm.nih.gov/pubmed/29265715 U6 - https://doi.org/10.1002/cnm.2951 SN - 2040-7947 VL - 34 IS - 4 PB - Wiley ER - TY - JOUR A1 - El-Qasem, Kawthar T1 - Oral transmission as meta-occupation: The significance of historically passed on meanings of everyday life in processes of deculturalization JF - Journal of Occupational Science KW - FBSK_Webseite Y1 - 2019 U6 - https://doi.org/10.1080/14427591.2019.1608843 SN - 2158-1576 VL - 26 IS - 2 SP - 275 EP - 293 PB - Taylor & Francis ER - TY - PAT A1 - Eilert, Eva A1 - Suckow, Manfred A1 - Piontek, Michael T1 - A method for producing ectoine or a derivative thereof and a yeast cell for use as a host cell in such a method N2 - Klassifikationen IPC C12N15/81; C12N15/82; C12P17/12; C12P7/42; CPC C12N15/815 (EP); C12P17/12 (EP); Y1 - 2014 UR - https://depatisnet.dpma.de/DepatisNet/depatisnet?action=pdf&docid=EP000002743350A1&xxxfull=1 ER - TY - JOUR A1 - Eilert, Eva A1 - Rolf, Theresa A1 - Heumaier, Andreas A1 - Hollenberg, Cornelis P. A1 - Piontek, Michael A1 - Suckow, Manfred T1 - Improved processing of secretory proteins in Hansenula polymorpha by sequence variation near the processing site of the alpha mating factor prepro sequence JF - Journal of biotechnology N2 - The literature as well as databases are ambiguous about the exact start of human interleukin-6 (IL-6)--three possibilities for the initiation of the mature protein are described. These three variants of IL-6, different in the exact initiation of the mature protein (A28, P29, or V30), were expressed in Hansenula polymorpha using the Saccharomyces cerevisiae MFα prepro sequence instead of the homologous pre sequence. All three IL-6 variants were secreted but the processing by the Kex2 protease showed significant differences. V30-IL-6 showed correctly processed material but also a molecule species of higher molecular weight indicating incomplete processing of the MFα pro peptide. P29-IL-6 did not yield any correctly processed IL-6, instead only the unprocessed pro form was found in the culture supernatant. Only A28-IL-6 led to 100% correctly processed material. N-terminal sequencing of this material revealed a start at V30--obviously the first two amino acids (Ala28-Pro29) have been removed by a so far unknown protease. Thus expression of both A28-IL-6 and V30-IL-6 as MFα prepro fusion proteins resulted in the very same mature V30-IL-6, however, the ratio of correctly processed molecules was significantly higher in the case of A28-IL-6. The expression of an MFα prepro-interferon α-2a (IFNα-2a) fusion protein in H. polymorpha leads to about 50% correctly processed molecules and 50% misprocessed forms which contain part of the pro peptide at the N-termini. The insertion of A28 and P29 of IL-6 between the pro peptide and the start of the mature IFNα-2a led to correct processing and elimination of all high molecular weight isoforms observed in earlier experiments. Y1 - 2013 UR - http://www.ncbi.nlm.nih.gov/pubmed/22982399 U6 - https://doi.org/10.1016/j.jbiotec.2012.08.024 VL - 167 IS - 2 SP - 94 EP - 100 PB - Elsevier ER - TY - JOUR A1 - Eilert, Eva A1 - Kranz, Andreas A1 - Hollenberg, Cornelis P. A1 - Piontek, Michael A1 - Suckow, Manfred T1 - Synthesis and release of the bacterial compatible solute 5-hydroxyectoine in Hansenula polymorpha JF - Journal of biotechnology N2 - Ectoine and 5-hydroxyectoine belong to the family of compatible solutes which are known to mainly contribute to the adaptation of the cell to osmotic stress by mediation of a constant turgor. In addition the cell's essential functions are maintained under stress conditions like high salinity, heat or aridity stress. Hansenula polymorpha was engineered to catalyze the transformation of monomeric substrates to 5-hydroxyectoine. For this purpose four genes encoding the enzymes of the 5-hydroxyectoine biosynthesis pathway of Halomonas elongata, EctA, EctB, EctC, and EctD, were inserted into the genome of H. polymorpha. Subsequently the syntheses of ectoine and 5-hydroxyectoine were analyzed and optimized. We showed that H. polymorpha is a suitable system for recombinant 5-hydroxyectoine synthesis in gram per liter scale (2.8 g L⁻¹ culture supernatant, 365 μmol/g dcw) in which almost 100% conversion of ectoine to 5-hydroxyectoine without necessity of high salinity were achieved. Y1 - 2013 UR - http://www.ncbi.nlm.nih.gov/pubmed/23467000 U6 - https://doi.org/10.1016/j.jbiotec.2013.02.005 VL - 167 IS - 2 SP - 85 EP - 93 PB - Elsevier ER - TY - JOUR A1 - Eilert, Eva A1 - Hollenberg, Cornelis P. A1 - Piontek, Michael A1 - Suckow, Manfred T1 - The use of highly expressed FTH1 as carrier protein for cytosolic targeting in Hansenula polymorpha JF - Journal of biotechnology N2 - The iron storage protein ferritin is a member of the non-heme iron protein family. It can store and release iron, therefore it prevents the cell from damage caused by iron-dioxygen reactions as well as it provides iron for biological processing. To study whether the human ferritin heavy chain (FTH1) can be expressed in Hansenula polymorpha, we integrated an expression cassette for FTH1 and analyzed the protein expression. We found very efficient expression of FTH1 and obtained yields up to 1.9 g/L under non-optimized conditions. Based on this result we designed a FTH1-PTH fusion protein to successfully express the parathyroid hormone fragment 1-34 (PTH) for the first time intracellular in H. polymorpha. Y1 - 2012 UR - http://www.ncbi.nlm.nih.gov/pubmed/22212821 U6 - https://doi.org/10.1016/j.jbiotec.2011.12.014 VL - 159 IS - 3 SP - 172 EP - 176 PB - Elsevier ER - TY - THES A1 - Eilert, Eva T1 - New applications of heterologous gene expression in Hansenula polymorpha for protein and metabolite production N2 - The methylotrophic yeast Hansenula polymorpha has been established as a highly efficient expression system. Strong promoters derived from the methanol metabolism pathway and mitotically stable high-copy integration have made this organism very effective for heterologous protein expression. To improve the processing of secretory proteins targeted by the MFα prepro sequence, variations in the amino acid composition near the processing site of Kex2p were investigated (Manuscript I). The insertion of Ala-Pro between MFα prepro sequence and protein of interest leads to an improved processing of the signal sequence in case of interleukin-6 (IL-6) and interferon-α 2a (IFNα-2a). Modeling of the transition sequences confirmed a better exposition of the Kex2p-cleavage site in dependency of Ala-Pro insertions. Analysis of the secreted proteins revealed activity of an Ala-Pro specific endoprotease. Partial removal of the N-terminal Ala-Pro dipeptide was also detected during IFNα-2a processing. The putative protease responsible for the processing of Ala-Pro dipeptides was identified by gene deletion. Significant similarities with Saccharomyces cerevisiae Ste13p were identified. To generally improve productivity in the H. polymorpha system new fusion protein strategies were investigated (Manuscript II). The recombinantly strongly expressed cytosolic ferritin heavy chain (FTH1) was analyzed with regard to its potential as fusion partner for difficult-to-express target proteins. A fragment of the parathyroid hormone (PTH) was chosen to explore whether fusion to FTH1 enhances PTH stability. We could show that the expression level of this fusion protein was at least of the magnitude of that of FTH1 without fusion partner. The solubility of the fusion protein was increased in comparison to FTH1 alone and no degradation of PTH occurred when fused C-terminally to FTH1. Ectoine and 5-hydroxyectoine belong to the family of compatible solutes which are known to contribute to the adaptation of the cell to osmotic stress by mediation of a constant turgor. H. polymorpha was engineered to express the enzymes of the H. elongata 5-hydroxyectoine biosynthesis pathway (Manuscript III). Expression of the enzymes EctB, EctA, EctC and EctD in H. polymorpha resulted in production of 5-hydroxyectoine in gram per liter scale with almost full conversion of ectoine to 5-hydroxyectoine. We showed that 5-hydroxyectoine synthesis was influenced by feeding of methanol during cultivation. Furthermore, 5-hydroxyectoine synthesis was downregulated by the addition of methionine, lysine or threonine indicating the existence of a feedback regulated aspartate kinase in H. polymorpha. N2 - Die methylotrophe Hefe Hansenula polymorpha hat sich als effizientes System zur heterologen Genexpression etabliert. Besondere Merkmale dieses Systems sind die starken Promotoren des Methanolstoffwechsels und die Fähigkeit zur mitotisch stabilen Integration einer Expressionskassette in einer hohen Kopienzahl. Am Beispiel der MF α prepro Sequenz sollte die Prozessierung sekretorisch exprimierter Proteine verbessert werden (Manuskript I). Hierfür wurden Veränderungen in der Nähe der Kex2p Erkennungssequenz durchgeführt. Durch das Einfügen von Ala-Pro zwischen MF_ prepro Sequenz und Zielprotein konnte die Prozessierung im Fall von Interleukin-6 (IL-6) und Interferon- α 2a (IFN α -2a) verbessert werden. Eine Modellierung dieses Sequenzübergangs zeigte eine verbesserte Präsentation der Kex2p-Schnittstelle. Nach Analyse des sekretierten IL-6 wurde außerdem die Aktivität einer Ala-Pro spezifischen Endoprotease festgestellt. Auch im Falle von IFN α -2a konnte eine partielle Abspaltung des N-terminalen Ala-Pro-Dipeptids festgestellt werden. Ein Protease, welche mutmaßlich an der Prozessierung dieser Ala-Pro-Dipeptide beteiligt ist, wurde per Gendeletion identifiziert. Diese Protease wies signifikante Ähnlichkeiten mit der S. cerevisiae Ste13p auf. Zur allgemeinen Verbesserung der Ausbeute bei der Produktion heterologer Proteine wurden neue Fusionsprotein-Strategien untersucht (Manuskript II). Hierfür wurde das rekombinant cytosolisch stark exprimierte Protein Ferritin (schwere Kette, FTH1) im Hinblick auf das Potenzial als Fusionspartner für schwierig zu exprimieren Zielproteine analysiert. Ein Fragment des Parathormons (PTH) wurde gewählt, um zu untersuchen, ob die Fusion beider Proteine die Stabilität von PTH erhöht. Wir konnten zeigen, dass die Expression dieses Fusionsproteins mindestens in der Größenordnung des FTH1 ohne Fusionspartner war. Die Löslichkeit des Fusionsproteins wurde gegenüber FTH1 allein erhöht und es trat kein Abbau des PTH in Fusion mit FTH1 auf. Ectoin und 5-Hydroxyectoin gehören zur Familie der kompatiblen Solute, die hauptsächlich zur Anpassung der Zelle bei osmotischem Stress durch Anpassung des Turgors beitragen. Ein H. polymorpha-Stamm wurde entwickelt, welcher die Enzyme der 5-Hydroxyectoin-Biosynthese aus H. elongata exprimiert (Manuskript III). Die Expression der Enzyme EctB, EctA, EctC und EctD in H. polymorpha resultierte in der Produktion von 5-Hydroxyectoin im Gramm pro Liter Bereich. Es fand außerdem eine nahezu vollständige Umwandlung von Ectoin in 5-Hydroxyectoin statt. Wir konnten zeigen, dass die 5-Hydroxyectoin-Synthese durch Zugabe von Methanol während der Kultivierung beeinflusst wurde. Desweiteren wurde die 5-Hydroxyectoin-Synthese durch die Zugabe von Methionin, Lysin oder Threonin herunterreguliert, was andeutet, dass in H. polymorpha eine Feedback-regulierte Aspartatkinase existiert. T2 - Neue Ansätze der heterologen Genexpression in Hansenula polymorpha zur Protein- und Metabolitenproduktion Y1 - 2013 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:061-20130527-092604-7 PB - Institut für Molekulare Mykologie, Institut für Mikrobiologie CY - Düsseldorf ER - TY - GEN A1 - Eilert, Eva T1 - Research Data Lifecycle N2 - A data lifecycle serves as a framework for structured data management. It covers the entire data flow from planning and generation to storage and provision. Measures for structured data management can be taken at all stages of the data lifecycle in order to use data efficiently, ensure its quality and guarantee its long-term availability. This diagram visualizes the research data lifecycle, which is divided into three main areas: planning and repurposing, generation and processing, and storage and provision. Each area comprises specific tasks and processes for handling data. The first phase, “Planning and Repurposing”, contains two key elements. The first is the planning of the research project, in which the objectives, methods and resources are defined. Secondly, it involves researching and reusing existing data in order to assess its usefulness and potential for the project at hand. The second phase, “Generation and processing”, consists of three elements, which are mapped in a separate circular process. First, data is collected and recorded, either through experimental studies, surveys or other methods. The transition from the first phase to the second phase takes place via this element, as this is where the basic generation of own data within the research begins. Secondly, the collected data is stored and organized to ensure its integrity and availability. Thirdly, the relevant information is processed, analyzed and selected. The transition from the second phase to the third phase takes place from this element, as the knowledge gained is prepared for further storage and provision. Overall, the second phase forms a continuous cycle. The third phase “Storage and Provision” consists of three elements. Firstly, the research results are published, be it in scientific journals, repositories or other relevant publication venues. Secondly, the data is archived to ensure its long-term availability and integrity. Thirdly, access to the research results is created, for example through selective access for certain user groups or increased visibility. KW - Forschungsdatenmanagement Y1 - 2025 U6 - https://doi.org/10.5281/zenodo.14752723 N1 - German version available under: https://doi.org/10.5281/zenodo.8087764 This graphic was created as part of the project module of the certificate course Research Data Management 2022/2023 (a cooperative course of the Landesinitiative für Forschungsdatenmanagement NRW - fdm.nrw, ZB MED - Informationszentrum Lebenswissenschaften and ZBIW). The graphic is available in 3 formats (PNG, SVG, AI) - colors, contours and lettering can be customized depending on the file format. PB - Zenodo ET - v1 ER - TY - CHAP A1 - Egermann, Hauke A1 - Lepa, Steffen A1 - Schönrock, Andreas A1 - Herzog, Martin A1 - Steffens, Jochen ED - Ginsborg, Jane ED - Lamont, Alexandra T1 - Development and Evaluation of a General Attribute Inventory for Music in Branding T2 - Proceedings of the 25th Anniversary Conference of the European Society for the Cognitive Sciences of Music (ESCOM): “The expressive interaction with music” (Ghent, Belgium) Y1 - 2017 UR - https://abcdj.eu/download/development-and-evaluation-of-a-general-attribute-inventory-for-music-in-branding/ CY - Ghent ER - TY - JOUR A1 - Eckhardt, Jennifer A1 - Kaletka, Christoph A1 - Pelka, Bastian A1 - Unterfrauner, Elisabeth A1 - Voigt, Christian A1 - Zirngiebl, Marthe T1 - Gender in the making: An empirical approach to understand gender relations in the maker movement JF - International Journal of Human-Computer Studies Y1 - 2021 U6 - https://doi.org/10.1016/j.ijhcs.2020.102548 SN - 1095-9300 VL - 145 IS - 102548 PB - Elsevier ER - TY - CHAP A1 - Echternacht, David A1 - Wirtz, Frank A1 - Dorendorf, Stefan A1 - Wilch, Michael A1 - Wienand, Marius A1 - Trunczik, Eileen T1 - A Fuzzy Logic Based Approach to Priority Determination for Smart Distribution Substations T2 - 2025 IEEE Kiel PowerTech, 29 June - 03 July 2025, Kiel KW - fuzzy logic KW - asset management KW - priority KW - smart secondary substations KW - distribution network Y1 - 2025 SN - 979-8-3315-4397-6 U6 - https://doi.org/10.1109/PowerTech59965.2025.11180606 SP - 1 EP - 6 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Stagge, Hanno A1 - Priebe, Jens A1 - Wiernes, Pablo Ezequiel A1 - Jagielski, Kai A1 - Petri, Anne-Kathrin A1 - Drießen, Sarah A1 - Trevisan, Bianka A1 - Digmayer, Claas A1 - Oberst, Christian A. A1 - Keysselitz, Bärbel A1 - Kremer, Martin A1 - Sieber, Sandra A1 - Krapp, Stefan A1 - Jakobs, Eva-Maria A1 - Frenz, Martin A1 - Lohrberg, Frank A1 - Wachten, Kunibert A1 - Moser, Albert T1 - Modelling, Planning, Design and Evaluation of DC-Distribution Grids T2 - International ETG Congress 2015 : die Energiewende ; blueprints for the new energy age ; proceedings ; November 17 - 18, 2015, World Conference Center, Bonn Y1 - 2015 UR - http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7388494 SP - 289 EP - 295 PB - VDE-Verl. CY - Bonn ER - TY - CHAP A1 - Echternacht, David A1 - Neusel-Lange, N. A1 - Schermuly, Rainer A1 - Meyer, F. T1 - Target Network Planning and Asset Condition Assessment as Basis for an integrated Asset Management Approach T2 - ETG Congress 2017, Bonn, 28.11.-29.11.2017 Y1 - 2017 CY - Bonn ER - TY - BOOK A1 - Echternacht, David A1 - Moser, Albert T1 - Cost optimal meter placement in low and medium voltagte grids considering stochastic dependencies T3 - IEEE PES ISGT Europe 2013, 06.10.2013 - 09.10.2013, Lyngby Y1 - 2013 UR - http://ieeexplore.ieee.org/document/6695335/ SN - 978-1-4799-2984-9 U6 - https://doi.org/10.1109/ISGTEurope.2013.6695335 SP - 1 EP - 5 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Linnemann, Christian A1 - Moser, Albert T1 - Optimized positioning of measurements in distribution grids T2 - 2012 3rd IEEE PES Innovative Smart Grid Technologies Europe (ISGT Europe), 14.10.2012 - 17.10.2012, Berlin Y1 - 2012 UR - http://ieeexplore.ieee.org/document/6465628/ SN - 978-1-4673-2597-4 U6 - https://doi.org/10.1109/ISGTEurope.2012.6465628 SP - 1 EP - 7 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Linnemann, Christian A1 - Drees, Tim A1 - Breuer, Christopher A1 - Moser, Albert ED - EUROSOLAR and the World Council for Renewable Energy, T1 - Large-Scale Storage Technologies in the Context of future German Transmission Grid Congestions T2 - 7th International Renewable Energy Storage Conference, 12.11.-14.11.2012, Berlin Y1 - 2012 CY - Berlin ER - TY - CHAP A1 - Echternacht, David A1 - Heuberger, Daniel A1 - Breuer, Christopher A1 - Linnemann, Christian A1 - Moser, Albert T1 - Advantageous positions for HVDC terminals in Europe T2 - 2013 IEEE Energytech, 21.05.2013 - 23.05.2013, Cleveland Y1 - 2013 UR - http://ieeexplore.ieee.org/document/6645291/ SN - 978-1-4673-4444-9 U6 - https://doi.org/10.1109/EnergyTech.2013.6645291 SP - 1 EP - 5 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Franken, Muriel A1 - Moser, Albert A1 - Geulen, Uwe A1 - Zimmer, Peter A1 - Feilhauer, Werner A1 - Schrieder, W. T1 - Smart Area Aachen - in field test of meter placement and state estimation algorithms for distribution grids T2 - 2015 IEEE PES Innovative Smart Grid Technologies Latin America (ISGT LATAM), 05.10.2015 - 07.10.2015, Montevideo Y1 - 2015 UR - http://ieeexplore.ieee.org/document/7381194/ SN - 978-1-4673-6605-2 U6 - https://doi.org/10.1109/ISGT-LA.2015.7381194 SP - 435 EP - 439 PB - IEEE ER - TY - CHAP A1 - Echternacht, David A1 - Fellhauer, W. A1 - Geulen, Uwe A1 - Schrieder, Werner A1 - Zimmer, Peter T1 - Smart Area Aachen - State Estimation in Distribution Grids T2 - Worls Smart Grid Forum 2013, Berlin, 23-25 September 2013 Y1 - 2013 SP - 1 EP - 6 CY - Berlin ER - TY - CHAP A1 - Echternacht, David A1 - El Haouati, I. A1 - Schermuly, Rainer A1 - Meyer, F. ED - Schulz, Detlef T1 - Simulating the impact of e-mobility charging infrastructure on urban low-voltage networks. Postersession T2 - NEIS 2018: Conference on Sustainable Energy Supply and Energy Storage Systems. Hamburg, Deutschland, 20.09.-21.09.2018 Y1 - 2018 SN - 978-3-8007-4821-1 SP - 208 EP - 213 PB - VDE CY - Frankfurt am Main; Piscataway, NJ ER - TY - CHAP A1 - Ebert, Julian A1 - Ackermann, David A1 - Weinzierl, Stefan T1 - Messung der Richtcharakteristik von Mikrofonen mit hoher Auflösung [Manuscript] T2 - Fortschritte der Akustik – DAS\DAGA 2025 Y1 - 2025 SN - 978-3-939296-23-2 U6 - https://doi.org/10.71568/dasdaga2025.178 SP - 487 EP - 490 PB - Deutsche Gesellschaft für Akustik eV (DEGA) CY - Berlin ER -