TY - JOUR A1 - Poth, Sebastian A1 - Monzon, Magaly A1 - Tippkötter, Nils A1 - Ulber, Roland T1 - Lignocellulosic biorefinery: Process integration of hydrolysis and fermentation (SSF process) JF - Holzforschung N2 - The aim of the present work is the process integration and the optimization of the enzymatic hydrolysis of wood and the following fermentation of the products to ethanol. The substrate is a fiber fraction obtained by organosolv pre-treatment of beech wood. For the ethanol production, a co-fermentation by two different yeasts (Saccharomyces cerevisiae and Pachysolen tannophilus) was carried out to convert glucose as well as xylose. Two approaches has been followed: 1. A two step process, in which the hydrolysis of the fiber fraction and the fermentation to product are separated from each other. 2. A process, in which the hydrolysis and the fermentation are carried out in one single process step as simultaneous saccharification and fermentation (SSF). Following the first approach, a yield of about 0.15 g ethanol per gram substrate can be reached. Based on the SSF, one process step can be saved, and additionally, the gained yield can be raised up to 0.3 g ethanol per gram substrate. Y1 - 2011 N1 - 11th EWLP, Hamburg, Germany, August 16–19, 2010 VL - 65 IS - 5 SP - 633 EP - 637 PB - De Gruyter CY - Berlin ER - TY - CHAP A1 - Poth, Sebastian A1 - Monzon, Magaly A1 - Tippkötter, Nils A1 - Ulber, Roland T1 - Lignocellulosic biorefinery : process integration of hydrolysis and fermentation T2 - Proceedings / 11th European Workshop on Lignocellulosics and Pulp : August 16 - 19, 2010, Hamburg, Germany Y1 - 2010 SP - 65 EP - 68 PB - vTi CY - Hamburg ER - TY - JOUR A1 - Pourshahidi, Ali Mohammad A1 - Achtsnicht, Stefan A1 - Nambipareechee, Mrinal Murali A1 - Offenhäusser, Andreas A1 - Krause, Hans-Joachim T1 - Multiplex detection of magnetic beads using offset field dependent frequency mixing magnetic detection JF - Sensors N2 - Magnetic immunoassays employing Frequency Mixing Magnetic Detection (FMMD) have recently become increasingly popular for quantitative detection of various analytes. Simultaneous analysis of a sample for two or more targets is desirable in order to reduce the sample amount, save consumables, and save time. We show that different types of magnetic beads can be distinguished according to their frequency mixing response to a two-frequency magnetic excitation at different static magnetic offset fields. We recorded the offset field dependent FMMD response of two different particle types at frequencies ƒ₁ + n⋅ƒ₂, n = 1, 2, 3, 4 with ƒ₁ = 30.8 kHz and ƒ₂ = 63 Hz. Their signals were clearly distinguishable by the locations of the extremes and zeros of their responses. Binary mixtures of the two particle types were prepared with different mixing ratios. The mixture samples were analyzed by determining the best linear combination of the two pure constituents that best resembled the measured signals of the mixtures. Using a quadratic programming algorithm, the mixing ratios could be determined with an accuracy of greater than 14%. If each particle type is functionalized with a different antibody, multiplex detection of two different analytes becomes feasible. KW - colorization KW - multiplex detection KW - frequency mixing magnetic detection KW - magnetic nanoparticles Y1 - 2021 U6 - https://doi.org/10.3390/s21175859 SN - 1424-8220 N1 - This article belongs to the Special Issue "Advanced Nanomaterial-Based Sensors for Biomedical Applications" VL - 21 IS - 17 PB - MDPI CY - Basel ER - TY - JOUR A1 - Pourshahidi, Ali Mohammad A1 - Achtsnicht, Stefan A1 - Offenhäusser, Andreas A1 - Krause, Hans-Joachim ED - Offenhäusser, Andreas T1 - Frequency Mixing Magnetic Detection Setup Employing Permanent Ring Magnets as a Static Offset Field Source JF - Sensors N2 - Frequency mixing magnetic detection (FMMD) has been explored for its applications in fields of magnetic biosensing, multiplex detection of magnetic nanoparticles (MNP) and the determination of core size distribution of MNP samples. Such applications rely on the application of a static offset magnetic field, which is generated traditionally with an electromagnet. Such a setup requires a current source, as well as passive or active cooling strategies, which directly sets a limitation based on the portability aspect that is desired for point of care (POC) monitoring applications. In this work, a measurement head is introduced that involves the utilization of two ring-shaped permanent magnets to generate a static offset magnetic field. A steel cylinder in the ring bores homogenizes the field. By variation of the distance between the ring magnets and of the thickness of the steel cylinder, the magnitude of the magnetic field at the sample position can be adjusted. Furthermore, the measurement setup is compared to the electromagnet offset module based on measured signals and temperature behavior. KW - magnetic sensors KW - biosensors KW - frequency mixing magnetic detection KW - magnetic nanoparticles Y1 - 2022 U6 - https://doi.org/10.3390/s22228776 SN - 1424-8220 VL - 22 IS - 22 PB - MDPI CY - Basel ER - TY - JOUR A1 - Pourshahidi, Ali Mohammad A1 - Engelmann, Ulrich M. A1 - Offenhäusser, Andreas A1 - Krause, Hans-Joachim T1 - Resolving ambiguities in core size determination of magnetic nanoparticles from magnetic frequency mixing data JF - Journal of Magnetism and Magnetic Materials N2 - Frequency mixing magnetic detection (FMMD) has been widely utilized as a measurement technique in magnetic immunoassays. It can also be used for the characterization and distinction (also known as “colourization”) of different types of magnetic nanoparticles (MNPs) based on their core sizes. In a previous work, it was shown that the large particles contribute most of the FMMD signal. This leads to ambiguities in core size determination from fitting since the contribution of the small-sized particles is almost undetectable among the strong responses from the large ones. In this work, we report on how this ambiguity can be overcome by modelling the signal intensity using the Langevin model in thermodynamic equilibrium including a lognormal core size distribution fL(dc,d0,σ) fitted to experimentally measured FMMD data of immobilized MNPs. For each given median diameter d0, an ambiguous amount of best-fitting pairs of parameters distribution width σ and number of particles Np with R2 > 0.99 are extracted. By determining the samples’ total iron mass, mFe, with inductively coupled plasma optical emission spectrometry (ICP-OES), we are then able to identify the one specific best-fitting pair (σ, Np) one uniquely. With this additional externally measured parameter, we resolved the ambiguity in core size distribution and determined the parameters (d0, σ, Np) directly from FMMD measurements, allowing precise MNPs sample characterization. Y1 - 2022 U6 - https://doi.org/10.1016/j.jmmm.2022.169969 SN - 0304-8853 VL - 563 IS - In progress, Art. No. 169969 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Preiß, C. A1 - Linder, Peter A1 - Wendt, K. A1 - Krystek, M. A1 - Digel, Ilya A1 - Gossmann, Matthias A1 - Temiz Artmann, Aysegül A1 - Porst, Dariusz A1 - Kayser, Peter A1 - Bassam, Rasha A1 - Artmann, Gerhard T1 - Engineering technology for plant physiology and plant stress research N2 - Plant physiology and plant stress: Plant physiology will be much more important for human mankind because of yield and cultivation limits of crops determined by their resistance to stress. To assess and counteract various stress factors it is necessary to conduct plant research to gain information and results on plant physiology. KW - Pflanzenphysiologie KW - Pflanzenstress KW - Pflanzenscanner KW - plant stress KW - plant scanner Y1 - 2011 ER - TY - JOUR A1 - Pressler, Axel A1 - Esefeld, Katrin A1 - Scherr, Johannes A1 - Ali, Mohammad A1 - Hanssen, Henner A1 - Kotliar, Konstantin A1 - Lanzl, Ines A1 - Halle, Martin A1 - Kaemmerer, Harald A1 - Schmidt-Trucksäss, Arno A1 - Hager, Alfred T1 - Structural alterations of retinal arterioles in adults late after repair of aortic isthmic coarctation JF - The American Journal of Cardiology N2 - Patients after coarctation repair still have an increased risk of cardiovascular or cerebrovascular events. This has been explained by the persisting hypertension and alterations in the peripheral vessels. However, involvement of the central vessels such as the retinal arteries is virtually unknown. A total of 34 patients after coarctation repair (22 men and 12 women; 23 to 58 years old, age range 0 to 32 years at surgical repair) and 34 nonhypertensive controls underwent structural and functional retinal vessel analysis. Using structural analysis, the vessel diameters were measured. Using functional analysis, the endothelium-dependent vessel dilation in response to flicker light stimulation was assessed. In the patients after coarctation repair, the retinal arteriolar diameter was significantly reduced compared to that of the controls (median 182 μm, first to third quartile 171 to 197; vs 197 μm, first to third quartile 193 to 206; p <0.001). These findings were independent of the peripheral blood pressure and age at intervention. No differences were found for venules. The functional analysis findings were not different between the patients and controls (maximum dilation 3.5%, first to third quartile 2.1% to 4.5% vs 3.6%, first to third quartile 2.2% to 4.3%; p = 0.81), indicating preserved autoregulative mechanisms. In conclusion, the retinal artery diameter is reduced in patients after coarctation repair, independent of their current blood pressure level and age at intervention. As a structural marker of chronic vessel damage associated with past, current, or future hypertension, retinal arteriolar narrowing has been linked to stroke incidence. These results indicate an involvement of cerebral microcirculation in aortic coarctation, despite timely repair, and might contribute to explain the increased rate of cerebrovascular events in such patients. Y1 - 2010 U6 - https://doi.org/10.1016/j.amjcard.2009.10.070 SN - 0002-9149 VL - 105 IS - 5 SP - 740 EP - 744 PB - Elsevier CY - Amsterdam ER - TY - CHAP A1 - Pricking, Sebastian A1 - Gebs, Raphael A1 - Fleischhaker, Robert A1 - Kleinbauer, Jochen A1 - Budnicki, Aleksander A1 - Sutter, Dirk A1 - Killi, Alexander A1 - Weiler, Sascha A1 - Mielke, M. A1 - Beaudou, B. A1 - Debord, B. A1 - Gerome, F. A1 - Benabid, F. ED - Dorsch, Friedhelm T1 - Hollow core fiber delivery of sub-ps pulses from a TruMicro 5000 Femto edition thin disk amplifier T2 - High-power laser materials processing: Lasers, beam delivery, diagnostics, and applications IV : 7 Februar 2015, San Francisco, USA. - (SPIE proceedings series ; 9356) Y1 - 2015 SN - 978-162841446-2 U6 - https://doi.org/10.1117/12.2079289 SN - 0277-786X SP - 935602 PB - SPIE, International Society for Optical Engineering ER - TY - CHAP A1 - Priede, Gareth A1 - Ferrein, Alexander T1 - Towards passive walking for the fully-actuated biped robot Nao T2 - Emerging trends in computing, informatics, systems sciences, and engineering. (Lecture notes in electrical engineering : vol. 151) N2 - Many biped robots deploy a form of gait that follows the zero moment point (ZMP) approach, that is, the robot is in a stable position at any point in time. This requires the robot to be fully actuated. While very stable, the draw-backs of this approach are a fairly slow gait and high energy consumption. An alternative approach is the so-called passive-dynamic walking, where the gait makes use of the inertia and dynamic stability of the robot. In this paper we describe our ongoing work of combining the principles of passive-dynamic walking on the fully-actuated biped robot Nao, which is also deployed for robotic soccer applications. We present a simple controller that allows the robot to stably rock sidewards, showing a closed limit-cycle. We discuss first results of superimposing a forward motion on the sidewards motion. Based on this we expect to endow the Nao with a fast, robust, and stable passive-dynamic walk on the fully-actuated Nao in the future. Y1 - 2013 SN - 978-1-4614-3557-0 ; 978-1-4614-3558-7 U6 - https://doi.org/10.1007/978-1-4614-3558-7_18 SP - 225 EP - 236 PB - Springer CY - New York, NY ER - TY - JOUR A1 - Prielmeier, Franz A1 - Hörstermann, D. A1 - Gyngell, M. L. A1 - Merboldt, K.-D. T1 - Localized Proton MRS of Acute and Chronic Gyperglycemia in Rat Brain in vivo / D. Hörstermann, F. Prielmeier , M. L. Gyngell, K.-D. Merboldt, W. Hänicke, J. Frahm JF - Book of Abstracts, SMRM, 11th Annual Meeting Berlin Y1 - 1992 N1 - Society of Magnetic Resonance in Medicine SP - 2740 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. T1 - Multinuclear Spin-Lattice Relaxation Time Studies of Supercooled Aqueous LiCl-Solutions / E .W. Lang, F. X. Prielmeier JF - Berichte der Bunsen-Gesellschaft für Physikalische Chemie. 92 (1988) Y1 - 1988 SN - 0005-9021 SP - 717 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. A1 - Lüdemann, H.-D. T1 - Pressure dependence of the self-diffusion in liquid trifluoromethane / F. X. Prielmeier; E. W. Lang; H.-D. Lüdemann JF - Molecular Physics. 52 (1984), H. 5 Y1 - 1984 SN - 0026-8976 SP - 1105 EP - 1113 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. A1 - Radkowitsch, H. A1 - Lüdemann, H. D. T1 - High Pressure NMR Study of the Molecular Dynamics of Liquid fluoroform and deutero-fluoroform / Lang, E. W. ; Prielmeier, F. X. ; Radkowitsch, H. ; Lüdemann, H. D. JF - Berichte der Bunsen-Gesellschaft für Physikalische Chemie. 91 (1987), H. 10 Y1 - 1987 SN - 0005-9021 SP - 1025 EP - 1033 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. A1 - Radkowitsch, H. A1 - Lüdemann, H.-D. T1 - High Pressure NMR Study of the Molecular Dynamics of Liquid methyl fluoride and deutero-methyl fluoride / Lang, E. W. ; Prielmeier, F. X. ; Radkowitsch, H. ; Lüdemann, H. D. JF - Berichte der Bunsen-Gesellschaft für Physikalische Chemie. 91 (1987), H. 10 Y1 - 1987 SN - 0005-9021 SP - 1017 EP - 1025 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. A1 - Speedy, R. J. A1 - Lüdemann, H.-D. T1 - The pressure Dependence of Self Diffusion in Supercooled Light and Heavy Water / F.X. Prielmeier, E .W. Lang, R. J. Speedy, H.-D. Lüdemann JF - Berichte der Bunsen-Gesellschaft für Physikalische Chemie. 92 (1988) Y1 - 1988 SN - 0005-9021 SP - 1111 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lang, E. W. A1 - Speedy, R. J. A1 - Lüdemann, H.-D. T1 - Diffusion in supercooled water to 300 MPa JF - Physical Review Letters. 59 (1987), H. 10 Y1 - 1987 SN - 0031-9007 SP - 1128 EP - 1131 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Lüdemann, H.-D. T1 - Self diffusion in compressed liquid chloromethane, dichloromethane and trichloromethane / F. X. Prielmeier; H.-D. Lüdemann JF - Molecular Physics. 58 (1986), H. 3 Y1 - 1986 SN - 0026-8976 SP - 593 EP - 604 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Merboldt, K. D. A1 - Hanicke, W. A1 - Frahm, J. T1 - Dynamic high-resolution MR imaging of brain deoxygenation during transient anoxia in the anesthetized rat JF - Journal of cerebral blood flow and metabolism. 13 (1993), H. 5 Y1 - 1993 SN - 0271-678X SP - 889 EP - 894 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Nagatomo, Yasushi A1 - Frahm, Jens T1 - Cerebral blood oxygenation in rat brain during hypoxic hypoxia. Quantitative MRI of effective transverse relaxation rates JF - Magnetic Resonance in Medicine. 31 (1994), H. 6 Y1 - 1994 SN - 0740-3194 SP - 678 EP - 681 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Nagatomo, Yasushi A1 - Wick, Markus A1 - Frahm, Jens T1 - Dynamic monitoring of cerebral metabolites during and after transient global ischemia in rats by quantitative proton NMR spectroscopy in vivo / Yasushi Nagatomo, Markus Wick, Franz Prielmeier, Jens Frahm JF - NMR in Biomedicine. 8 (1995), H. 6 Y1 - 1995 SN - 1099-1492 SP - 265 EP - 270 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Radkowitsch, H. A1 - Lang, E. W. A1 - Lüdemann, H.-D. T1 - Density dependence of the molecular dynamics of fluid CH3F and CF3H studied by NMR / H. Radkowitsch, F. X. Prielmeier, E. W. Lang and H.-D. Lüdemann JF - Physica B+C. 139-140 (1986) Y1 - 1986 SN - 0921-4526 SP - 96 EP - 99 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Speedy, R. J. A1 - Lüdemann, H.-D. T1 - High Pressure NMR Self-Diffusion Studies on Supercooled Water JF - High Pressure Science and Technology Proceeding XI AIRAPT, Kiew. 1 Y1 - 1987 N1 - AIRAPT Conference / International Association for the Advancement of High Pressure Science and Technology SP - 75 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Speedy, R. J. A1 - Vardag, T. A1 - Lang, E. W. T1 - Diffusion in simple fluids / R. J. Speedy; F. X. Prielmeier; T. Vardag; E. W. Lang; H.-D. Lüdemann JF - Molecular Physics. 66 (1989), H. 3 Y1 - 1989 SN - 0026-8976 SP - 577 EP - 590 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Wick, Markus A1 - Nagatomo, Yasushi A1 - Frahm, Jens T1 - Alteration of Intracellular Metabolite Diffusion in Rat Brain In Vivo During Ischemia and Reperfusion / Markus Wick, Yasushi Nagatomo, Franz Prielmeier, Jens Frahm JF - Stroke. 26 (1995), H. 10 Y1 - 1995 SN - 0039-2499 SP - 1930 EP - 1934 ER - TY - JOUR A1 - Prielmeier, Franz A1 - Woznyj, M. A1 - Lüdemann, H.-D. T1 - Pressure Dependence of the Melting and Self Diffusion in 2,2-Dimethylpropane, 2,2-Dimethylpropionitrile, and 2-Methylpropanol-2 / M. Woznyj, F. X. Prielmeier, H.-D. Lüdemann JF - Zeitschrift für Naturforschung A, Journal of Physical Sciences. 39 (1984) Y1 - 1984 SN - 0932-0784 SP - 800 ER - TY - JOUR A1 - Probst, M. A1 - Behbahani, Mehdi A1 - Borrmann, E. A1 - Elgeti, S. A1 - Nicolai, M. A1 - Behr, Marek T1 - Hemodynamic Modeling for Numerical Analysis and Design of Medical Devices Y1 - 2010 N1 - Posterpresentation ; NIC Symposium 2010 ; 24 - 25 February 2010 Jülich, Germany ER - TY - JOUR A1 - Prochnow, Nora A1 - Gebing, Tina A1 - Ladage, Kerstin A1 - Krause-Finkeldey, Dorothee A1 - Ourdi, Abessamad El A1 - Bitz, Andreas A1 - Streckert, Joachim A1 - Hansen, Volkert A1 - Dermietzel, Rolf T1 - Electromagnetic field effect or simply stress? Effects of UMTS exposure on hippocampal longterm plasticity in the context of procedure related hormone release JF - PLoS one N2 - Harmful effects of electromagnetic fields (EMF) on cognitive and behavioural features of humans and rodents have been controversially discussed and raised persistent concern about adverse effects of EMF on general brain functions. In the present study we applied radio-frequency (RF) signals of the Universal Mobile Telecommunications System (UMTS) to full brain exposed male Wistar rats in order to elaborate putative influences on stress hormone release (corticosteron; CORT and adrenocorticotropic hormone; ACTH) and on hippocampal derived synaptic long-term plasticity (LTP) and depression (LTD) as electrophysiological hallmarks for memory storage and memory consolidation. Exposure was computer controlled providing blind conditions. Nominal brain-averaged specific absorption rates (SAR) as a measure of applied mass-related dissipated RF power were 0, 2, and 10 W/kg over a period of 120 min. Comparison of cage exposed animals revealed, regardless of EMF exposure, significantly increased CORT and ACTH levels which corresponded with generally decreased field potential slopes and amplitudes in hippocampal LTP and LTD. Animals following SAR exposure of 2 W/kg (averaged over the whole brain of 2.3 g tissue mass) did not differ from the sham-exposed group in LTP and LTD experiments. In contrast, a significant reduction in LTP and LTD was observed at the high power rate of SAR (10 W/kg). The results demonstrate that a rate of 2 W/kg displays no adverse impact on LTP and LTD, while 10 W/kg leads to significant effects on the electrophysiological parameters, which can be clearly distinguished from the stress derived background. Our findings suggest that UMTS exposure with SAR in the range of 2 W/kg is not harmful to critical markers for memory storage and memory consolidation, however, an influence of UMTS at high energy absorption rates (10 W/kg) cannot be excluded. Y1 - 2011 U6 - https://doi.org/10.1371/journal.pone.0019437 VL - 6 IS - 5 PB - PLOS CY - San Francisco ER - TY - JOUR A1 - Prume, Klaus T1 - Electrical and electromechanical characterization of piezoelectric thin films in view of MEMS application / Tiedke, S. ; Prume, K. ; Schmitz-Kempen, T.; Y1 - 2007 N1 - ISAF 2007. Sixteenth IEEE International Symposium on Applications of Ferroelectrics, 2007 SP - 702 ER - TY - JOUR A1 - Prume, Klaus A1 - Booij, W. E. A1 - Vogl, A. H. A1 - Wang, D. T. T1 - A simple and powerful analytical model for MEMS piezoelectric multimorphs / Booij, W. E. ; Vogl, A. H. ; Wang, D. T. ; Tyholdt, F. ; Ostbo, N. P. ; Raeder, H. ; Prume, K. JF - Journal of Electroceramics. 19 (2007), H. 4 Y1 - 2007 SN - 1385-3449 SP - 387 EP - 393 ER - TY - JOUR A1 - Prume, Klaus A1 - Franken, Klaus A1 - Böttger, Ulrich A1 - Waser, Rainer T1 - Modelling and numerical simulation of the electrical, mechanical, and thermal coupled behaviour of Multilayer capacitors (MLCs) / Prume, Klaus ; Franken, Klaus ; Böttger, Ulrich ; Waser, Rainer ; Maier, Horst R. JF - Journal of the European Ceramic Society. 22 (2002), H. 8 Y1 - 2002 SN - 0955-2219 SP - 1285 EP - 1296 ER - TY - JOUR A1 - Prume, Klaus A1 - Franken, Klaus A1 - Maier, Horst R. A1 - Waser, Rainer T1 - Finite-Element Analysis of Ceramic Multilayer Capacitors: Failure Probability Caused by Wave Soldering and Bending Loads / Franken, Klaus ; Maier, Horst R. ; Prume, Klaus ; Waser, Rainer JF - Journal of the American Ceramic Society. 83 (2000), H. 6 Y1 - 2000 SN - 0002-7820 SP - 1433 EP - 1440 ER - TY - JOUR A1 - Prume, Klaus A1 - Gerber, P. A1 - Roelofs, A. A1 - Kügeler, C. T1 - Effects of the top-electrode size on the piezoelectric properties (d33 and S) of lead zirconate titanate thin films / Gerber, P. ; Roelofs, A. ; Kügeler, C.; Böttger, U. ; Waser, R. ; Prume, K. ; JF - Journal of Applied Physics . 96 (2004), H. 5 Y1 - 2004 SN - 0021-8979 SP - 2800 EP - 2804 ER - TY - JOUR A1 - Prume, Klaus A1 - Gerber, Peter A1 - Kügeler, Carsten A1 - Roelofs, Andreas T1 - Simulation and measurements of the piezoelectric properties response (d33) of piezoelectric layered thin film structures influenced by the top-electrode size / Prume, K. ; Gerber, P. ; Kügeler, C. ; Roelofs, A. ; Böttger, U. ; Waser, R. ; Schmitz-Kempen, Y1 - 2004 SN - 0-7803-8410-5 N1 - 14th IEEE International Symposium on Applications of Ferroelectrics, 2004. ISAF-04. 2004 SP - 7 EP - 10 ER - TY - JOUR A1 - Prume, Klaus A1 - Meyer, René A1 - Waser, Rainer A1 - Schmitz, Torsten T1 - Dynamic leakage current compensation in ferroelectric thin-film capacitor structures / Meyer, René ; Waser, Rainer ; Prume, Klaus ; Schmitz, Torsten ; Tiedke, Stephan JF - Applied Physics Letters . 86 (2005), H. 14 Y1 - 2005 SN - 0003-6951 SP - 142907-1 EP - 142907-3 ER - TY - JOUR A1 - Prume, Klaus A1 - Muralt, P. A1 - Calame, F. A1 - Schmitz-Kempen, T. T1 - Piezoelectric thin films: evaluation of electrical and electromechanical characteristics for MEMS devices / Prume, K. ; Muralt, P. ; Calame, F. ; Schmitz-Kempen, T. ; Tiedke, S. ; JF - IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control. 54 (2007), H. 1 Y1 - 2007 SN - 0885-3010 SP - 81 EP - 14 ER - TY - JOUR A1 - Prume, Klaus A1 - Muralt, Paul A1 - Calame, Florian A1 - Schmitz-Kempen, Thorsten T1 - Extensive electromechanical characterization of PZT thin films for MEMS applications by electrical and mechanical excitation signals / Prume, Klaus ; Muralt, Paul ; Calame, Florian ; Schmitz-Kempen, Thorsten ; Tiedke, Stephan JF - Journal of Electroceramics. 19 (2007), H. 4 Y1 - 2007 SN - 1385-3449 SP - 407 EP - 411 ER - TY - JOUR A1 - Prume, Klaus A1 - Peter, F. A1 - Rüdiger, A. A1 - Dittmann, R. T1 - Analysis of shape effects on the piezoresponse in ferroelectric nanograins with and without adsorbates / Peter, F. ; Rüdiger, A. ; Dittmann, R. ; Waser, R. ; Szot, K. ; Reichenberg, B. ; Prume, K. ; JF - Applied Physics Letters . 87 (2005), H. 8 Y1 - 2005 SN - 0003-6951 SP - 082901 EP - 082901-3 ER - TY - JOUR A1 - Prume, Klaus A1 - Raeder, H. A1 - Tyholdt, F. A1 - Booij, W. E. T1 - Taking piezoelectric microsystems from the laboratory to production / Raeder, H. ; Tyholdt, F. ; Booij, W. ; Calame, F. ; Ostbo, N. P. ; Bredesen, R. ; Prume, K. ; Rijnders, G. ; Muralt, P. JF - Journal of Electroceramics. 19 (2007), H. 4 Y1 - 2007 SN - 1385-3449 SP - 357 EP - 362 ER - TY - JOUR A1 - Prume, Klaus A1 - Reichenberg, B. A1 - Roelofs, A. A1 - Waser, R. T1 - In-situ compensation of the parasitic capacitance for nanoscale hysteresis measurements / Schmitz, T. ; Prume, K. ; Reichenberg, B. ; Roelofs, A. ; Waser, R. ; Tiedke, S. JF - Journal of the European Ceramic Society. 24 (2004), H. 6 Y1 - 2004 SN - 0955-2219 N1 - Electroceramics VIII SP - 1145 EP - 1147 ER - TY - JOUR A1 - Prume, Klaus A1 - Roelofs, Andreas A1 - Schmitz, Thorsten A1 - Reichenberg, Bernd T1 - Compensation of the Parasitic Capacitance of a Scanning Force Microscope Cantilever Used for Measurements on Ferroelectric Capacitors of Submicron Size by Means of Finite Element Simulations / Prume, Klaus ; Roelofs, Andreas ; Schmitz, Thorsten ; Reichenb JF - Japanese Journal of Applied Physics. 41 (2002), H. 11B Y1 - 2002 SN - 0021-4922 SP - 7198 EP - 7201 ER - TY - JOUR A1 - Prume, Klaus A1 - Tiedke, S. A1 - Schmitz, T. A1 - Roelofs, A. T1 - Direct hysteresis measurements of single nanosized ferroelectric capacitors contacted with an atomic force microscope / Tiedke, S. ; Schmitz, T. ; Prume, K. ; Roelofs, A. ; Schneller, T. ; Kall, U. ; Waser, R. ; Ganpule, C. S. ; Nagarajan, V. ; Stanishevs JF - Applied Physics Letters. 79 (2001), H. 22 Y1 - 2001 SN - 0003-6951 SP - 3678 EP - 3680 ER - TY - JOUR A1 - Prume, Klaus A1 - Tyholdt, F. A1 - Calame, F. A1 - Raeder, H. T1 - Chemically derived seeding layer for {100}-textured PZT thin films / Tyholdt, F. ; Calame, F. ; Prume, K. ; Raeder, H. ; Muralt, P. JF - Journal of Electroceramics. 19 (2007), H. 4 Y1 - 2007 SN - 1385-3449 SP - 311 EP - 314 ER - TY - JOUR A1 - Prume, Klaus A1 - Waser, Rainer T1 - Finite-element simulation of coupled characteristics of ceramic multilayer capacitors under transient electrical loading / Prume, Klaus ; Waser, Rainer JF - Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics. Vol. 2 Y1 - 2000 N1 - ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on Applications of Ferroelectrics SP - 675 EP - 678 ER - TY - JOUR A1 - Prume, Klaus A1 - Waser, Rainer A1 - Franken, Klaus A1 - Maier, Horst R. T1 - Finite-Element Analysis of Ceramic Multilayer Capacitors: Modeling and Electrical Impedance Spectroscopy for a Nondestructive Failure Test / Prume, Klaus ; Waser, Rainer ; Franken, Klaus ; Maier, Horst R. ; JF - Journal of the American Ceramic Society. 83 (2000), H. 5 Y1 - 2000 SN - 0002-7820 SP - 1153 EP - 1159 ER - TY - JOUR A1 - Prume, Klaus A1 - Zalachas, Nicolas A1 - Laskewitz, Bernd A1 - Kamlah, Marc T1 - Effective Piezoelectric Coefficients of Ferroelectric Thin Films on Elastic Substrates / Zalachas, Nicolas ; Laskewitz, Bernd ; Kamlah, Marc ; Prume, Klaus ; Lapusta, Yuri ; Tiedke, Stephan JF - Journal of Intelligent Material Systems and Structures. 20 (2008), H. 6 Y1 - 2008 SN - 1045-389X SP - 683 EP - 695 ER - TY - CHAP A1 - Pulini, Paola A1 - Gligorevic, Snjezana T1 - WIMAX performance in the airport environment T2 - Multi-carrier systems & solutions 2009. (Lecture notes in electrical engineering ; 41) N2 - In this paper, the multicarrier physical layers of WiMAX are evaluated in the context of airport data links. The orthogonal frequency-division multiplexing (OFDM) and orthogonal frequency-division multiple-access (OFDMA) cases are applied to the forward link (FL) and reverse link (RL), respectively. The performance of the so called parking and taxi scenarios is presented for airport communications in C-band. Numerical results show that the proposed scheme brings good performance for both the FL and the RL. For the OFDMA case a structure changing called double-tile is also proposed to improve the system performance. Y1 - 2009 SN - 978-90-481-2529-6 (Print) ; 978-90-481-2530-2 (Online) SP - 301 EP - 310 PB - Springer CY - Berlin [u.a.] ER - TY - JOUR A1 - Puppe, Michael A1 - Giuliano, Stefano A1 - Frantz, Cathy A1 - Uhlig, Ralf A1 - Schumacher, Ralph A1 - Ibraheem, Wagdi A1 - Schmalz, Stefan A1 - Waldmann, Barbara A1 - Guder, Christoph A1 - Peter, Dennis A1 - Schwager, Christian A1 - Teixeira Boura, Cristiano José A1 - Alexopoulos, Spiros A1 - Spiegel, Michael A1 - Wortmann, Jürgen A1 - Hinrichs, Matthias A1 - Engelhard, Manfred A1 - Aust, Michael T1 - Techno-economic optimization of molten salt solar tower plants JF - AIP Conference Proceedings art.no. 040033 N2 - In this paper the results of a techno-economic analysis of improved and optimized molten salt solar tower plants (MSSTP plants) are presented. The potential improvements that were analyzed include different receiver designs, different designs of the HTF-system and plant control, increased molten salt temperatures (up to 640°C) and multi-tower systems. Detailed technological and economic models of the solar field, solar receiver and high temperature fluid system (HTF-system) were developed and used to find potential improvements compared to a reference plant based on Solar Two technology and up-to-date cost estimations. The annual yield model calculates the annual outputs and the LCOE of all variants. An improved external tubular receiver and improved HTF-system achieves a significant decrease of LCOE compared to the reference. This is caused by lower receiver cost as well as improvements of the HTF-system and plant operation strategy, significantly reducing the plant own consumption. A novel star receiver shows potential for further cost decrease. The cavity receiver concepts result in higher LCOE due to their high investment cost, despite achieving higher efficiencies. Increased molten salt temperatures seem possible with an adapted, closed loop HTF-system and achieve comparable results to the original improved system (with 565°C) under the given boundary conditions. In this analysis all multi tower systems show lower economic viability compared to single tower systems, caused by high additional cost for piping connections and higher cost of the receivers. REFERENCES Y1 - 2019 U6 - https://doi.org/10.1063/1.5067069 VL - 2033 IS - Issue 1 PB - AIP Publishing CY - Melville, NY ER - TY - JOUR A1 - Pöttgen, Philipp A1 - Ederer, Thorsten A1 - Altherr, Lena A1 - Lorenz, Ulf A1 - Pelz, Peter F. T1 - Examination and optimization of a heating circuit for energy-efficient buildings JF - Energy Technology N2 - The conference center darmstadtium in Darmstadt is a prominent example of energy efficient buildings. Its heating system consists of different source and consumer circuits connected by a Zortström reservoir. Our goal was to reduce the energy costs of the system as much as possible. Therefore, we analyzed its supply circuits. The first step towards optimization is a complete examination of the system: 1) Compilation of an object list for the system, 2) collection of the characteristic curves of the components, and 3) measurement of the load profiles of the heat and volume-flow demand. Instead of modifying the system manually and testing the solution by simulation, the second step was the creation of a global optimization program. The objective was to minimize the total energy costs for one year. We compare two different topologies and show opportunities for significant savings. KW - energy transfer KW - heating system KW - programming KW - system optimization KW - technical operations research Y1 - 2015 SN - 2194-4296 U6 - https://doi.org/10.1002/ente.201500252 VL - 4 IS - 1 SP - 136 EP - 144 PB - WILEY-VCH Verlag CY - Weinheim ER - TY - JOUR A1 - Pöttgen, Philipp A1 - Ederer, Thorsten A1 - Altherr, Lena A1 - Pelz, Peter F. T1 - Developing a control strategy for booster stations under uncertain load JF - Applied Mechanics and Materials N2 - Booster stations can fulfill a varying pressure demand with high energy-efficiency, because individual pumps can be deactivated at smaller loads. Although this is a seemingly simple approach, it is not easy to decide precisely when to activate or deactivate pumps. Contemporary activation controls derive the switching points from the current volume flow through the system. However, it is not measured directly for various reasons. Instead, the controller estimates the flow based on other system properties. This causes further uncertainty for the switching decision. In this paper, we present a method to find a robust, yet energy-efficient activation strategy. KW - Technical Operations Research (TOR) KW - Booster Station KW - Pump System KW - Discrete Optimization Y1 - 2015 SN - 1662-7482 U6 - https://doi.org/10.4028/www.scientific.net/AMM.807.241 N1 - Ebenfalls weltweit einsehbar unter: http://wl.fst.tu-darmstadt.de/wl/publications/paper_151123_SFB805_ ICUME_Developing_a_Control_Strategy_for_Booster_Stations_under_Uncertain_Load_poettgen_ederer_pelz_altherr.pdf VL - 807 IS - 807 SP - 241 EP - 246 PB - Trans Tech Publications CY - Bäch ER - TY - CHAP A1 - Pütz, Sebastian A1 - Baier, Ralph A1 - Brauner, Philipp A1 - Brillowski, Florian A1 - Dammers, Hannah A1 - Liehner, Luca A1 - Mertens, Alexander A1 - Rodemann, Niklas A1 - Schneider, Sebastian A1 - Schollemann, Alexander A1 - Steuer-Dankert, Linda A1 - Vervier, Luisa A1 - Gries, Thomas A1 - Leicht-Scholten, Carmen A1 - Nagel, Saskia K. A1 - Piller, Frank T. A1 - Schuh, Günther A1 - Ziefle, Martina A1 - Nitsch, Verena T1 - An interdisciplinary view on humane interfaces for digital shadows in the internet of production T2 - 2022 15th International Conference on Human System Interaction (HSI) N2 - Digital shadows play a central role for the next generation industrial internet, also known as Internet of Production (IoP). However, prior research has not considered systematically how human actors interact with digital shadows, shaping their potential for success. To address this research gap, we assembled an interdisciplinary team of authors from diverse areas of human-centered research to propose and discuss design and research recommendations for the implementation of industrial user interfaces for digital shadows, as they are currently conceptualized for the IoP. Based on the four use cases of decision support systems, knowledge sharing in global production networks, human-robot collaboration, and monitoring employee workload, we derive recommendations for interface design and enhancing workers’ capabilities. This analysis is extended by introducing requirements from the higher-level perspectives of governance and organization. KW - digital twin KW - digital shadow KW - cyber-physical production system KW - human-machine interface Y1 - 2022 SN - 978-1-6654-6823-7 (Print) SN - 978-1-6654-6822-0 (Online) U6 - https://doi.org/10.1109/HSI55341.2022.9869467 SN - 2158-2246 (Print) SN - 2158-2254 (Online) N1 - 15th International Conference on Human System Interaction (HSI), 28-31 July 2022, Melbourne, Australia. PB - IEEE ER -