TY - JOUR A1 - Uffmann, Kai A1 - Abicht, Claus A1 - Grote, Wolfgang A1 - Quick, Harald H. A1 - Ladd, Mark E. T1 - Design of an MR-compatible piezoelectric actuator for MR elastography JF - Concepts in Magnetic Resonance Part A: Bridging Education and Research N2 - Magnetic Resonance (MR) elastography is a method for measuring tissue elasticity via phase images acquired with an MR scanner. The propagation of periodic mechanical waves through the tissue can be captured by means of a modified phase contrast sequence. These waves are generated with a mechanical oscillator (actuator) and coupled into the tissue through the skin. The actuator must be capable of generating a sinusoidal excitation with excellent phase and amplitude stability, while not disturbing the MR imaging process. In this work, an actuator based on a piezoelectric principle was developed. Based on the imaging evaluation of several material samples, the housing for the piezoelectric ceramic was constructed of aluminum. Smaller parts of the housing were manufactured from brass and titanium to fulfill the mechanical constraints. A lever was used to transfer the oscillation generated by the piezoelectric ceramic to the point of excitation. The lever amplifies the piezoelectric motion, allowing for a more compact design. Three different lever designs were characterized by an acceleration sensor both outside and inside the magnet. It was shown that the rigidity of the lever, as determined by its material and form, was decisive in determining the resonant frequency of the system and therefore the maximum practical frequency of operation. It was also shown that the motion of the oscillator is unaffected by the electromagnetic fields of the MR imager. The final design can be placed directly in the magnet bore within a few centimeters of the tissue volume to be imaged without generating significant artifacts. An amplitude range of 0–1 mm in the frequency range from 0 to over 300 Hz was achieved, sufficient for performing most MR elastography applications. © 2002 Wiley Periodicals, Inc. Concepts in Magnetic Resonance (Magn Reson Engineering) 15: 239–254, 2002 KW - Elasticity KW - Elastography KW - Actuator KW - MRI KW - Piezoelectric Y1 - 2002 UR - 1552-5023 U6 - https://doi.org/https://doi.org/10.1002/cmr.10045 VL - 15 IS - 4 SP - 239 EP - 254 PB - Wiley 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 - Beyer, Marc-André A1 - Grote, Wolfgang A1 - Reinig, Gunter T1 - Adaptive exact linearization control of batch polymerization reactors using a Sigma-Point Kalman Filter JF - Journal of Process Control N2 - The Chylla–Haase polymerization reactor is widely accepted as a benchmark process for the evaluation of control strategies for batch reactors. In this contribution a control concept based on Exact I/O-Linearization is proposed and compared to a conventional cascade control structure. In order to adapt the exact linearization control strategy to various polymerization products and batch conditions, an advanced probabilistic inference algorithm (Sigma-Point Kalman Filter) is applied and investigated. Sigma-Point Kalman Filters have the major improvement of simplified implementation compared to local linearization methods (i.e. Extended Kalman Filter) because no analytical Jacobians are required. Stochastic simulation studies are introduced and show the effectiveness, accuracy and benefit of the control concept. Within several scenarios a satisfying robustness against structural errors in the underlying model equations for the nonlinear control law and the inference algorithm is demonstrated. Furthermore it is pointed out, that with little effort in reassembling the plant design, control performance can be improved significantly. KW - Batch process operation KW - Exact I/O-Linearization control KW - Online parameter estimation KW - Sigma-Point Kalman Filter Y1 - 2008 UR - 1873-2771 U6 - https://doi.org/10.1016/j.jprocont.2007.12.002 VL - 18 IS - 7-8 SP - 663 EP - 675 PB - Elsevier ER - TY - CHAP A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Optimal power system unit commitment with guaranteed local stability T2 - Proceedings of the 2011 American Control Conference N2 - This article deals with the cost optimal commitment of power systems. System stability is often only considered after solving the commitment problem. We show by example that a cost optimization may result in a mode of operation that, while economically optimal, is unstable or has otherwise unacceptable dynamics. As a remedy, we propose to use the so-called normal vector method, which has been developed for the optimization of nonlinear dynamical systems with stability boundaries and uncertain parameters. We apply the method to a small sample power grid, where the optimization goal is to minimize the energy production costs for a given power consumption. KW - Optimization KW - Power system stability KW - Robustness Y1 - 2011 U6 - https://doi.org/10.1109/ACC.2011.5991058 SN - 2378-5861 SP - 4526 EP - 4531 PB - IEEE ER - TY - JOUR A1 - Grote, Wolfgang A1 - Kastsian, Darya A1 - Mönnigmann, Martin T1 - Guaranteed stability in optimal power generation dispatching under uncertainty JF - IEEE Transactions on Power Systems N2 - Stability and cost optimality of power generation and supply systems must not be considered independently from one another. Simple examples show that optimizing cost without considering stability may result in modes of operation that, while economically optimal, are unstable. We demonstrate that stability, robustness, and optimality can be considered systematically and simultaneously by combining bifurcation theory and nonlinear optimization. Essentially, the proposed method enforces a backoff distance between the optimal point of operation and operational or stability boundaries in the space of the optimization variables, where bifurcation theory is used to describe nonlinear stability boundaries. KW - Normal vector method KW - Power dispatch KW - Robust optimization KW - Stability KW - Unit commitment Y1 - 2013 U6 - https://doi.org/10.1109/TPWRS.2012.2207970 SN - 1558-0679 VL - 28 IS - 2 SP - 1103 EP - 1112 PB - IEEE ER - TY - JOUR A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Möllenbruck, Florian A1 - Mönnigmann, Martin T1 - Plant-wide control of a parabolic trough power plant with thermal energy storage JF - IFAC Proceedings Volumes N2 - We present a control scheme for a parabolic trough power plant that is equipped with a molten salt thermal energy storage system. We show that the multivariable control problem for the solar field can be decoupled by controlling the three way valve that splits the heat transfer fluid between the storage system and the steam generator. The steam generation cycle is regulated with inlet pressure control. The subsystems of the plant are modeled based on first principles, where we focus on the steam generation cycle. A multi-group extraction turbine with pre- and reheater is considered, which is suitable for solar power plants. We demonstrate the benefits of the proposed control scheme with a day-to-day simulation. KW - Control of power plants KW - Solar power plants KW - Thermal energy storage KW - Decoupling control Y1 - 2014 U6 - https://doi.org/10.3182/20140824-6-ZA-1003.00879 SN - 2589-3653 VL - 47 IS - 3 SP - 419 EP - 425 PB - Elsevier ER - TY - JOUR A1 - Mier, Dominik A1 - Möllenbruck, Florian A1 - Jost, Michael A1 - Grote, Wolfgang A1 - Mönnigmann, Martin T1 - Model predictive control of the steam cycle in a solar power plant JF - IFAC-PapersOnLine N2 - We derive a nonlinear model of the steam cycle of a solar power plant, estimate its unknown parameters with measured data, and design a linear model predictive controller based on the resulting model. Simulations show that the linear model predictive controller is able to regulate the electrical power of the nonlinear steam process of the plant to a given reference trajectory very well. Moreover, it results in very good disturbance rejection. KW - Power plant control KW - solar power KW - model predictive control Y1 - 2015 U6 - https://doi.org/10.1016/j.ifacol.2015.09.052 SN - 2405-8963 VL - 48 IS - 8 SP - 710 EP - 715 PB - Elsevier ER - TY - CHAP A1 - Spiegel, Thomas ED - The International Centre for Sustainable Development of Energy, Water and Environment Systems, T1 - Imbalance reduction of energy balancing groups as a means of renewable energy expansion - Optiosn for an active energy balancing group management T2 - 12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik Y1 - 2017 ER - TY - CHAP A1 - Rödder, Maximilian A1 - Frank, Lena A1 - Kirschner, Daniel A1 - Neef, Matthias A1 - Adam, Mario ED - The International Centre for Sustainable Development of Energy, Water and Environment Systems, T1 - EnergiBUS4home – Sustainable energy resourcing in low-energy buildings T2 - 12th Conference on Sustainable Development of Energy, Water and Environment Systems, 04.-08.10.2017, Dubrovnik KW - energiBUS4home Y1 - 2017 ER - TY - CHAP A1 - Reich, Marius A1 - Adam, Mario A1 - Lambach, Stefan T1 - Comparison of different Methods for Approximating Models of Energy Supply Systems and Polyoptimising the Systems-Structure and Components-Dimension T2 - 30th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2017), San Diego, California, USA, 2-6 July 2017 KW - Fast-Energy-Design Y1 - 2018 SN - 9781510862562 SP - 2921 EP - 2933 PB - Curran Associates Inc CY - Red Hook, NY ER - TY - CHAP A1 - Helbig, Sonja A1 - Eggert, Daniel A1 - Adam, Mario ED - Romero, Manuel ED - Mugnier, Daniel ED - Renné, David ED - Guthrie, Ken ED - Griffiths, Steven T1 - Energetic and Economic Efficiency Evaluation of Solar Assisted Heating Systems for Multi-Family Houses T2 - Proceedings of SWC2017/SHC2017, 29.10.-02.11.2017, Abu Dhabi KW - SUW-MFH Y1 - 2017 UR - http://proceedings.ises.org/swc2017 SN - 978-3-9814659-7-6 U6 - https://doi.org/10.18086/swc.2017.29.04 SP - 1 EP - 10 PB - International Solar Energy Society CY - Freiburg ER - TY - JOUR A1 - Wiesmann, Thomas A1 - Hamel, Christian A1 - Kaluza, Stefan T1 - Techniques to Remove Traces of Oxygen by Catalytic Conversion from Gas Mixtures JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201800022 SN - 1522-2640 VL - 90 IS - 10 SP - 1446 EP - 1452 PB - Wiley ER - TY - JOUR A1 - Weide, Philipp A1 - Schulz, Katharina A1 - Kaluza, Stefan A1 - Rohe, Markus A1 - Beranek, Radim A1 - Muhler, Martin T1 - Controlling the Photocorrosion of Zinc Sulfide Nanoparticles in Water by Doping with Chloride and Cobalt Ions JF - Langmuir Y1 - 2016 UR - http://www.ncbi.nlm.nih.gov/pubmed/27934521 U6 - https://doi.org/10.1021/acs.langmuir.6b03385 SN - 1520-5827 VL - 32 IS - 48 SP - 12641 EP - 12649 PB - ACS Publ. ER - TY - JOUR A1 - Titus, Juliane A1 - Kaluza, Stefan A1 - Marschall, Roland T1 - German Catalysis on an International Scale in Weimar JF - ChemCatChem Y1 - 2014 U6 - https://doi.org/10.1002/cctc.201402266 SN - 1867-3899 VL - 6 IS - 6 SP - 1523 EP - 1525 PB - Wiley ER - TY - JOUR A1 - Schulzke, Tim A1 - Conrad, Stefan A1 - Kaluza, Stefan A1 - van Loo, Tom T1 - Upgrading of fast pyrolysis condensates via esterification with higher alcohols JF - Biomass and Bioenergy Y1 - 2017 U6 - https://doi.org/10.1016/j.biombioe.2017.05.010 SN - 0961-9534 N1 - Postprint ist veröffentlicht unter: http://publica.fraunhofer.de/dokumente/N-446003.html VL - 103 SP - 11 EP - 20 PB - Elsevier ER - TY - JOUR A1 - Schmidt, Stefan A1 - Göbel, Christoph A1 - Nebel, Janine A1 - Wiesmann, Thomas A1 - Hamel, Christian A1 - Reinsdorf, Arne A1 - Wolf, Dorit A1 - Gehrmann, Stefan A1 - Tenhumberg, Nils A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - Recent Developments in the Conversion of Synthesis Gas to Short-Chain Alcohols over Cu-Co-Based Catalysts JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201800023 SN - 1522-2640 VL - 90 IS - 10 SP - 1465 EP - 1475 PB - Wiley ER - TY - JOUR A1 - Schittkowski, Julian A1 - Ruland, Holger A1 - Laudenschleger, Daniel A1 - Girod, Kai A1 - Kähler, Kevin A1 - Kaluza, Stefan A1 - Muhler, Martin A1 - Schlögl, Robert T1 - Methanol Synthesis from Steel Mill Exhaust Gases: Challenges for the Industrial Cu/ZnO/Al 2 O 3 Catalyst JF - Chemie Ingenieur Technik Y1 - 2018 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34526 SN - 1522-2640 N1 - We gratefully appreciate the support received from the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF, Verbundvorhaben Carbon2Chem®). VL - 90 IS - 10 SP - 1419 EP - 1429 PB - Wiley ER - TY - JOUR A1 - Peter, Maximilian A1 - Fichtl, Matthias B. A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin A1 - Hinrichsen, Olaf T1 - Detailed kinetic modeling of methanol synthesis over a ternary copper catalyst JF - Chemical Engineering Journal Y1 - 2012 U6 - https://doi.org/10.1016/j.cej.2012.06.066 SN - 0009-2509 VL - 203 SP - 480 EP - 491 PB - Elsevier ER - TY - JOUR A1 - Nebel, Janine A1 - Schmidt, Stefan A1 - Pan, Qiushi A1 - Lotz, Katrin A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the role of cobalt carbidization in higher alcohol synthesis over hydrotalcite-based Co-Cu catalysts JF - Chinese Journal of Catalysis Y1 - 2019 U6 - https://doi.org/10.1016/S1872-2067(19)63344-9 SN - 1872-2067 N1 - The research project is funded by the Federal Ministry of Education and Research (Bundesministerium für Bildung und Forschung, BMBF, Verbundvorhaben Carbon2Chem®, FKZ: 03EK3041). VL - 40 IS - 11 SP - 1731 EP - 1740 PB - Elsevier ER - TY - JOUR A1 - Mei, Bastian A1 - Sánchez, Miguel D. A1 - Reinecke, Thomas A1 - Kaluza, Stefan A1 - Xia, Wei A1 - Muhler, Martin T1 - The synthesis of Nb-doped TiO2 nanoparticles by spray drying: an efficient and scalable method JF - Journal of Materials Chemistry Y1 - 2011 U6 - https://doi.org/10.1039/c1jm11431j SN - 1364-5501 VL - 21 IS - 32 SP - 11781 EP - 11790 PB - Royal Society of Chemistry (RSC) ER - TY - CHAP A1 - Kaluza, Stefan A1 - Muhler, Martin ED - Gaigneaux, E. M. ED - Devillers, M. ED - Hermans, S. ED - Jacobs, P. A. ED - Martens, J. A. ED - Ruiz, P. T1 - A novel continuous approach for the synthesis and characterization of pure and mixed metal oxide systems applied in heterogeneous catalysis T2 - Scientific Bases for the Preparation of Heterogeneous Catalysts Y1 - 2010 SN - 978-0-444-53601-3 U6 - https://doi.org/10.1016/S0167-2991(10)75027-8 VL - Studies in Surface Science and Catalysis, 175 SP - 217 EP - 220 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Kaluza, Stefan A1 - Schröter, Marie Katrin A1 - Naumann d'Alnoncourt, Raoul A1 - Reinecke, Thomas A1 - Muhler, Martin T1 - High Surface Area ZnO Nanoparticles via a Novel Continuous Precipitation Route JF - Advanced Functional Materials Y1 - 2008 U6 - https://doi.org/10.1002/adfm.200800457 SN - 1616-3028 N1 - The authors gratefully acknowledge fruitful discussions with Malte Behrens and Robert Schlögl, and financial support by the BMBF (Bundesministerium für Bildung und Forschung, project 01RI05028 “Entwicklung von Methanolsynthesekatalysatoren als Basis für nachhaltige Ressourcennutzung”). Supporting Information is available online from Wiley InterScience or from the author. VL - 18 IS - 22 SP - 3670 EP - 3677 ER - TY - JOUR A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the Role of Aging, Washing, and Drying in the Synthesis of Polycrystalline Zinc Oxide by Precipitation: Combining Fast Continuous Mixing, Spray Drying and Freeze Drying to Unravel the Solid-State Transformations of the Precipitate JF - Catalysis Letters Y1 - 2009 UR - 1572-879X U6 - https://doi.org/10.1007/s10562-008-9818-5 N1 - The authors gratefully acknowledge fruitful discussions with Malte Behrens and Robert Schlögl, and the financial support by the BMBF (Bundesministerium für Bildung und Forschung) within the scope of the project 01RI05028 “Entwicklung von Methanolsynthesekatalysatoren als Basis für nachhaltige Ressourcennutzung” VL - 129 IS - 3-4 SP - 287 EP - 292 PB - Springer ER - TY - JOUR A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - On the precipitation mechanism and the role of the post-precipitation steps during the synthesis of binary ZnO–Al2O3 composites with high specific surface area JF - Journal of Materials Chemistry KW - FBMV Y1 - 2009 U6 - https://doi.org/10.1039/b902004g SN - 1364-5501 VL - 19 IS - 23 SP - 3914 EP - 3922 PB - Royal Society of Chemistry (RSC) ER - TY - JOUR A1 - Kaluza, Stefan A1 - Behrens, Malte A1 - Schiefenhövel, Nora A1 - Kniep, Benjamin A1 - Fischer, Richard A1 - Schlögl, Robert A1 - Muhler, Martin T1 - A Novel Synthesis Route for Cu/ZnO/Al2O3 Catalysts used in Methanol Synthesis: Combining Continuous Consecutive Precipitation with Continuous Aging of the Precipitate JF - ChemCatChem Y1 - 2011 U6 - https://doi.org/10.1002/cctc.201000329 SN - 1867-3899 VL - 3 IS - 1 SP - 189 EP - 199 PB - Wiley ER - TY - JOUR A1 - Junge Puring, Kai A1 - Piontek, Stefan A1 - Smialkowski, Mathias A1 - Burfeind, Jens A1 - Kaluza, Stefan A1 - Doetsch, Christian A1 - Apfel, Ulf-Peter T1 - Simple Methods for the Preparation of Non-noble Metal Bulk-electrodes for Electrocatalytic Applications JF - Journal of visualized experiments : JoVE N2 - The rock material pentlandite with the composition Fe4.5Ni4.5S8 was synthesized via high temperature synthesis from the elements. The structure and composition of the material was characterized via powder X-ray diffraction (PXRD), Mössbauer spectroscopy (MB), scanning electron microscopy (SEM), differential scanning calorimetry (DSC) and energy dispersive X-ray spectroscopy (EDX). Two preparation methods of pentlandite bulk electrodes are presented. In the first approach a piece of synthetic pentlandite rock is directly contacted via a wire ferrule. The second approach utilizes pentlandite pellets, pressed from finely ground powder, which is immobilized in a Teflon casing. Both electrodes, whilst being prepared by an additive-free method, reveal high durability during electrocatalytic conversions in comparison to common drop-coating methods. We herein showcase the striking performance of such electrodes to accomplish the hydrogen evolution reaction (HER) and present a standardized method to evaluate the electrocatalytic performance by electrochemical and gas chromatographic methods. Furthermore, we report stability tests via potentiostatic methods at an overpotential of 0.6 V to explore the material limitations of the electrodes during electrolysis under industrial relevant conditions. Y1 - 2017 UR - http://www.ncbi.nlm.nih.gov/pubmed/28671654 U6 - https://doi.org/10.3791/56087 SN - 1940-087X IS - 124 PB - JoVE ER - TY - JOUR A1 - Heeskens, Denise A1 - Aghaei, Pedram A1 - Kaluza, Stefan A1 - Strunk, Jennifer A1 - Muhler, Martin T1 - Selective oxidation of ethanol in the liquid phase over Au/TiO 2 JF - physica status solidi (b) Y1 - 2013 U6 - https://doi.org/10.1002/pssb.201248440 SN - 1521-3951 VL - 250 IS - 6 SP - 1107 EP - 1118 PB - Wiley ER - TY - CHAP A1 - Hamel, Christian A1 - Kaluza, Stefan A1 - Unger, Christoph ED - Ernst, Stefan T1 - Catalytic tar reforming of biomass-derived synthesis gas: Influence of the catalyst, gas composition and sulfur poisoning T2 - Preprints of the DGMK-Conference "Synthesis Gas Chemistry",October 7 - 9, 2015, Dresden Y1 - 2015 SN - 978-3-941721-56-2 VL - DGMK Tagungsbericht, 2015,2 SP - 139 EP - 146 PB - DGMK CY - Hamburg ER - TY - JOUR A1 - Girod, Kai A1 - Breitkreuz, Klaas A1 - Gerstner, Andrea A1 - Marzi, Thomas A1 - Schulzke, Tim A1 - Kaluza, Stefan T1 - Close‐to‐Practice Investigations of Heterogeneously Catalyzed Syngas Conversions in Slurry and Fixed‐Bed Reactor Systems JF - Chemie Ingenieur Technik Y1 - 2018 U6 - https://doi.org/10.1002/cite.201700143 SN - 1522-2640 VL - 90 IS - 5 SP - 690 EP - 695 PB - Wiley 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 - Boz, İsmail A1 - Kaluza, Stefan A1 - Boroğlu, Mehtap Şafak A1 - Muhler, Martin T1 - Synthesis of high surface area ZnO powder by continuous precipitation JF - Materials Research Bulletin Y1 - 2012 U6 - https://doi.org/10.1016/j.materresbull.2012.02.005 SN - 1873-4227 VL - 47 IS - 5 SP - 1185 EP - 1190 PB - Elsevier ER - TY - JOUR A1 - Bordoloi, Ankur A1 - Sanchez, Miguel A1 - Noei, Heshmat A1 - Kaluza, Stefan A1 - Großmann, Dennis A1 - Wang, Yuemin A1 - Grünert, Wolfgang A1 - Muhler, Martin T1 - Catalytic Behaviour of Mesoporous Cobalt-Aluminum Oxides for CO Oxidation JF - Journal of Catalysts Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-34344 SN - 2314-5110 SP - 1 EP - 9 PB - Hindawi ER - TY - JOUR A1 - Anton, Johan A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin T1 - Fast and Reproducible Testing of Cu–Co-Based Catalysts Applied in the Conversion of Synthesis Gas to Ethanol and Higher Alcohols JF - Catalysis Letters Y1 - 2015 U6 - https://doi.org/10.1007/s10562-015-1543-2 N1 - The work was part of the project “Bioethanol from synthesis gas—BETSY”, funded by the Ministry for Economy, Energy, Building, Habitation and Transportation of Northrhine-Westphalia within the program Ziel2.NRW financed by the European Union through the European regional development fund ERDF. VL - 145 IS - 7 SP - 1374 EP - 1381 PB - Springer ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Song, Huiqing A1 - Froese, Christian A1 - Weide, Philipp A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - The effect of sodium on the structure–activity relationships of cobalt-modified Cu/ZnO/Al2O3 catalysts applied in the hydrogenation of carbon monoxide to higher alcohols JF - Journal of Catalysis Y1 - 2016 U6 - https://doi.org/10.1016/j.jcat.2015.12.016 SN - 0021-9517 VL - 335 SP - 175 EP - 186 PB - Elsevier ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Göbel, Christoph A1 - Gabrysch, Thomas A1 - Song, Huiqing A1 - Froese, Christian A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - CO Hydrogenation to Higher Alcohols over Cu–Co-Based Catalysts Derived from Hydrotalcite-Type Precursors JF - Topics in Catalysis Y1 - 2016 UR - https://doi.org/10.1007/s11244-016-0663-2 U6 - https://doi.org/10.1007/s11244-016-0663-2 VL - 59 IS - 15-16 SP - 1361 EP - 1370 PB - Springer Nature ER - TY - JOUR A1 - Anton, Johan A1 - Nebel, Janine A1 - Song, Huiqing A1 - Froese, Christian A1 - Weide, Philipp A1 - Ruland, Holger A1 - Muhler, Martin A1 - Kaluza, Stefan T1 - Structure–activity relationships of Co-modified Cu/ZnO/Al2O3 catalysts applied in the synthesis of higher alcohols from synthesis gas JF - Applied Catalysis A: General Y1 - 2015 U6 - https://doi.org/10.1016/j.apcata.2015.07.002 SN - 0926-860X VL - 505 SP - 326 EP - 333 PB - Elsevier ER - TY - CHAP A1 - Anton, Johan A1 - Nebel, Janine A1 - Froese, Christian A1 - Kleinschmidt, Ralph A1 - Quandt, Thomas A1 - Ruland, Holger A1 - Kaluza, Stefan A1 - Muhler, Martin ED - Ernst, Stefan T1 - Higher alcohol synthesis over Na-modified Co-Cu catalysts: Co2C formation and effect of surface composition T2 - Preprints of the DGMK-Conference "Synthesis Gas Chemistry", October 7 - 9, 2015, Dresden N2 - Cu–Co-based model catalysts were prepared by a sophisticated alkali-free synthesis method and tested in the conversion of synthesis gas to higher alcohols. MoO3-coated alumina was used as the support, providing both high specific surface area and strongly interacting sites for the deposition of the active metals. A bulk Cu/Co ratio of ~2 was found to be most suitable in terms of activity and product distribution. Surface enrichment of Mo for all samples was observed by XPS, which significantly influenced the performance of the catalysts. Mo was found to be both a structural and a chemical promoter. Strong metal–support interactions were further achieved by modification of alumina with magnesia. With 12 wt% Mg incorporated, the catalysts showed 40% total oxygenate selectivity including 11% selectivity to ethanol. Y1 - 2015 SN - 978-3-941721-56-2 VL - DGMK Tagungsbericht, 2015,2 PB - DGMK CY - Hamburg ER - TY - GEN A1 - Seidel, Carl Anton T1 - Jumping Humanoid Simulink Simulation With Three Hill-Type Muscle Models N2 - This paper investigates the implementation of a human body model for the simulation of a jumping motion in Simulink. It contains details to get an insight into modern biomechanics without previous experience. In the simulation, a Hill-Type muscle is used to generate joint momentum with a phenomenologically realistic relationship between muscle length and force. The simulation published with this article is one of many solutions to design a humanoid simulation. The paper guides through the implemented build and explains its range of application. KW - biomechanics KW - humanoid Simulation KW - locomotion study KW - Simulation of Mechanical Systems Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:due62-opus-33765 CY - Düsseldorf ER - TY - CHAP A1 - Biedermann, Till M. A1 - Reich, Marius A1 - Kameier, Frank A1 - Adam, Mario A1 - Paschereit, C. T1 - Assessment of Statistical Sampling Methods and Approximation Models Applied to Aeroacoustic and Vibroacoustic Problem T2 - NOVEM - 6th conference on Noise and Vibration emerging methods, 07.-09.05.2018, Ibiza / Spain Y1 - 2018 CY - Ibiza ER - TY - CHAP A1 - Wendland, André A1 - Bumann, Marc A1 - Martin, Shane A1 - Niemann, Jörg A1 - Bosman, Stephen ED - Yilmaz, Murat ED - Niemann, Jörg ED - Clarke, Paul ED - Messnarz, Richard T1 - Optimizing System Design Through Thermal Analysis with Cubesatellite as Case Study 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_30 SP - 408 EP - 420 PB - Springer International Publishing CY - Cham ER - TY - JOUR A1 - Ruess, Martin A1 - Pahl, P. J. T1 - An extended QR-solver for large profiled matrices JF - International Journal for Numerical Methods in Engineering Y1 - 2009 U6 - https://doi.org/10.1002/nme.2618 SN - 1097-0207 VL - 79 IS - 11 SP - 1419 EP - 1442 PB - Wiley ER - TY - JOUR A1 - Yang, Zhengxiong A1 - Kollmannsberger, Stefan A1 - Düster, Alexander A1 - Ruess, Martin A1 - Garcia, Eduardo Grande A1 - Burgkart, Rainer A1 - Rank, Ernst T1 - Non-standard bone simulation: interactive numerical analysis by computational steering JF - Computing and Visualization in Science Y1 - 2011 U6 - https://doi.org/10.1007/s00791-012-0175-y VL - 14 IS - 5 SP - 207 EP - 216 PB - Springer ER - TY - JOUR A1 - Zander, Nils A1 - Kollmannsberger, Stefan A1 - Ruess, Martin A1 - Yosibash, Z. A1 - Rank, Ernst T1 - The Finite Cell Method for linear thermoelasticity JF - Computers & Mathematics with Applications Y1 - 2012 U6 - https://doi.org/10.1016/j.camwa.2012.09.002 SN - 0898-1221 N1 - Open Archiv VL - 64 IS - 11 SP - 3527 EP - 3541 PB - Elsevier ER - TY - CHAP A1 - Ruess, Martin A1 - Mundani, Ralf-Peter A1 - Rank, Ernst T1 - Computational steering in dynamic structure simulation: An improved communication concept T2 - 2009 IEEE Toronto International Conference Science and Technology for Humanity (TIC-STH), Toronto, 26.09.2009 - 27.09.2009 Y1 - 2009 UR - http://ieeexplore.ieee.org/document/5444450/ SN - 978-1-4244-3877-8 U6 - https://doi.org/10.1109/TIC-STH.2009.5444450 SP - 497 EP - 502 PB - IEEE ER - TY - JOUR A1 - Yang, Z. A1 - Ruess, Martin A1 - Kollmannsberger, Stefan A1 - Düster, Alexander A1 - Rank, Ernst T1 - An efficient integration technique for the voxel-based finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2012 U6 - https://doi.org/10.1002/nme.4269 SN - 1097-0207 VL - 91 IS - 5 SP - 457 EP - 471 PB - Wiley ER - TY - CHAP A1 - Ruess, Martin A1 - Varduhn, Vasco A1 - Rank, Ernst A1 - Yosibash, Zohar ED - Bader, Michael T1 - A Parallel High-Order Fictitious Domain Approach for Biomechanical Applications T2 - 11th International Symposium on Parallel and Distributed Computing (ISPDC), 2012 : 25 - 29 June 2012, Munich, Germany ; proceedings Y1 - 2012 UR - http://ieeexplore.ieee.org/document/6341523/ SN - 978-1-4673-2599-8 U6 - https://doi.org/10.1109/ISPDC.2012.45 SP - 279 EP - 285 PB - IEEE CY - Piscataway ER - TY - JOUR A1 - Schillinger, Dominik A1 - Ruess, Martin A1 - Zander, Nils A1 - Bazilevs, Yuri A1 - Düster, Alexander A1 - Rank, Ernst T1 - Small and large deformation analysis with the p- and B-spline versions of the Finite Cell Method JF - Computational Mechanics Y1 - 2012 U6 - https://doi.org/10.1007/S00466-012-0684-Z SN - 1432-0924 VL - 50 IS - 4 SP - 445 EP - 478 PB - Springer ER - TY - JOUR A1 - Ruess, Martin A1 - Schillinger, Dominik A1 - Bazilevs, Yuri A1 - Varduhn, Vasco A1 - Rank, Ernst T1 - Weakly enforced essential boundary conditions for NURBS-embedded and trimmed NURBS geometries on the basis of the finite cell method JF - International Journal for Numerical Methods in Engineering Y1 - 2013 U6 - https://doi.org/10.1002/nme.4522 SN - 1097-0207 VL - 95 IS - 10 SP - 811 EP - 846 PB - Wiley ER -