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Suche nach „[Mátéfi-Tempfli] [Stefan]“ hat 165 Publikationen gefunden
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    DigitalMobilEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    V. Dürr, P. Arena, H. Cruse, Ch.J. Dallmann, A. Drimus, T. Hoinville, T. Krause, Stefan Mátéfi-Tempfli, J. Paskarbeit, L. Patane, M. Schilling, J. Schmitz, R. Strauss, A. Vitanza, A. Schneider

    Integrative Biomimetics of Autonomous Hexapedal Locomotion

    Proceedings of IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS) [November 3-8, 2019; Macau, China]

    2019

    Abstract anzeigen

    Despite substantial advances in many different fields of neurorobotics in general, and biomimetic robots in particular, a key challenge is the integration of concepts: to collate and combine research on disparate and conceptually disjunct research areas in the neurosciences and engineering sciences. We claim that the development of suitable robotic integration platforms is of particular relevance to make such integration of concepts work in practice. Here, we provide an example for a hexapod robotic integration platform for autonomous locomotion. In a sequence of six focus sections dealing with aspects of intelligent, embodied motor control in insects and multipedal robots—ranging from compliant actuation, distributed proprioception and control of multiple legs, the formation of internal representations to the use of an internal body model—we introduce the walking robot HECTOR as a research platform for integrative biomimetics of hexapedal locomotion. Owing to its 18 highly sensorized, compliant actuators, light-weight exoskeleton, distributed and expandable hardware architecture, and an appropriate dynamic simulation framework, HECTOR offers many opportunities to integrate research effort across biomimetics research on actuation, sensory-motor feedback, inter-leg coordination, and cognitive abilities such as motion planning and learning of its own body size.

    DigitalMobilEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    de Oliveira Hansen, R. M. D., M. Mátéfi-Tempfli, R. Safonovs, J. Adam, S. Chemnitz, T. Reimer, B. Wagner, W. Benecke, Stefan Mátéfi-Tempfli

    Magnetic films for electromagnetic actuation in MEMS switches

    Microsystem Technologies, vol. 24, no. 4, pp. 1987-1994

    2018

    DOI: 10.1007/s00542-017-3595-2

    Abstract anzeigen

    This paper investigates the fabrication of magnetic films via electroplating to be applied into electromagnetic actuated micro electro-mechanical systems (MEMS) switches. Cobalt and nickel films (1 µm thicknesses) were deposited on gold coated silicon substrates via electrochemical deposition. Different deposition conditions were investigated, regarding temperature and deposition voltage. The films morphologies were characterized via atomic force microscopy, while the magnetic properties of the films were characterized via vibrating sample magnetometer measurements. In order to evaluate the integration of these magnetic films into MEMS switches with low energy consumption, a mathematical model was developed and the results show that these films can be applied into efficient actuation with reduced power dissipation.

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    A. Milosavljević, Gy Vikor, Z. Pešić, Stefan Mátéfi-Tempfli, et al.

    Guiding of Electrons by Al2O3 Nanocapillaries

    Symposium on Condensed Matter Physics (SFKM), Vrsaca, Serbien

    2017

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    P. Coman, Stefan Mátéfi-Tempfli, S. Veje, R. White

    Modeling Vaporization, Gas Generation and Venting in Li-Ion Battery Cells with a Dimethyl Carbonate Electrolyte

    Electrochemical Society Journal, vol. 164, no. 9

    2017

    Abstract anzeigen

    This paper presents a mathematical model developed for predicting the temperature-pressure behavior and gas generation inside 18650 LCO/Graphite cells with a DMC (Dimethyl Carbonate) electrolyte. The cell was modeled using oven heating conditions, and the analysis was done at time intervals around the venting event. The paper also presents the thermodynamic property table for DMC, as extracted from different resources and calculated using various assumptions. The model was developed by deriving the energy balance for an unsteady-flow control volume and applying the isentropic flow equations corresponding to the venting of gas. The results show that the model fails to predict the pressure measured experimentally when no gas is generated inside. When adding the gas generation due to pre-venting reactions occurring, the model can predict the pressure profile measured experimentally.

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    J. Branch, M. Alibouri, D. Cook, P. Richardson, P. Bartlett, M. Mátéfi-Tempfli, Stefan Mátéfi-Tempfli, M. Bampton, T. Cookson, P. Connell, D. Smith

    Plastic Reactor Suitable for High Pressure and Supercritical Fluid Electrochemistry

    Journal of The Electrochemical Society, vol. 164, no. 6

    2017

    Abstract anzeigen

    The paper describes a reactor suitable for high pressure, particularly supercritical fluid, electrochemistry and electrodeposition at pressures up to 30 MPa at 115°C. The reactor incorporates two key, new design concepts; a plastic reactor vessel and the use of o-ring sealed brittle electrodes. These two innovations widen what can be achieved with supercritical fluid electrodeposition. The suitability of the reactor for electroanalytical experiments is demonstrated by studies of the voltammetry of decamethylferrocene in supercritical difluromethane and for electrodeposition is demonstrated by the deposition of Bi. The application of the reactor to the production of nanostructures is demonstrated by the electrodeposition of ∼80 nm diameter Te nanowires into an anodic alumina on silicon template. Key advantages of the new reactor design include reduction of the number of wetted materials, particularly glues used for insulating electrodes, compatability with reagents incompatible with steel, compatability with microfabricated planar multiple electrodes, small volume which brings safety advantages and reduced reagent useage, and a significant reduction in experimental time.

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    P. Farhang, A. Drimus, Stefan Mátéfi-Tempfli

    New Technique for Voltage Tracking Control of a Boost Converter Based on the PSO Algorithm and LTspice

    57th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON), Riga, Lettland

    2016

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    R. Brehm, S. Top, Stefan Mátéfi-Tempfli

    A distributed multi-agent linear bi-objective algorithm for energy flow optimization in microgrids

    Proceedings of 2015 IEEE International Renewable and Sustainable Energy Conference (IRSEC'15)

    2016

    ISBN: 978-1-4673-7894-9

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    V. Jankovics, Stefan Mátéfi-Tempfli, P. Manoonpong

    Artifcial neural network based complaint control for robot arms

    From Animals to Animats 14, vol. 9825

    2016

    ISBN: 978-3-319-43488-9

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    P. Farhang, Stefan Mátéfi-Tempfli

    A New Approach to Control the Modified LinVerter for High Frequency Applications

    IEEE Applied Power Electronics Conference (APEC2106), Long Beach (Los Angeles), CA, USA

    2016

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    H. Bülter, G. Denuault, Stefan Mátéfi-Tempfli, M. Mátéfi-Tempfli, C. Dosche, G. Wittstock

    Electrochemical analysis of nanostructured iron oxides using cyclic voltammetry and scanning electrochemical microscopy

    Electrochimica Acta, vol. 222, pp. 1326-1334

    2016

    Abstract anzeigen

    Iron oxides in general and especially hematite, α-Fe2O3, have become promising materials for the alkaline water electrolysis and photoelectrochemical water splitting, respectively. In the present study electrocatalytic electrodes with a thin film of α-Fe2O3 and with vertically aligned α-Fe2O3 nanowires were prepared. Cyclic voltammograms of the α-Fe2O3 nanowires revealed differences including a series of three unreported cathodic signals when compared to previously published voltammograms for polycrystalline iron oxides. The generation-collection mode of scanning electrochemical microscopy (SECM) using nanostructured Pt microdisc probes was exploited to detect soluble reaction products formed at the voltammetric peaks of the α-Fe2O3 electrode. SECM tip-substrate voltammetry unexpectedly showed that the reduction of FeVI to FeIII on the cathodic sweep is accompanied by significant O2 evolution.

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    P. Farhang, Stefan Mátéfi-Tempfli

    A New Approach to Control the Modified LinVerter for High Frequency Applications

    Proceedings of the 31st Annual IEEE Applied Power Electronics Conference and Exposition (APEC2016) [March 20-24, 2016; Long Beach, USA]

    2016

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    A. Drimus, V. Jankovics, M. Gorsic, Stefan Mátéfi-Tempfli

    Novel high resolution tactile robotic fingertips

    IEEE SENSORS 2014, Valencia, Spanien

    2015

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    Oliveira Hansen, R. M. D., M. Mátéfi-Tempfli, S. Chemnitz, T. Reimer, B. Wagner, Stefan Mátéfi-Tempfli, W. Benecke, H.-G. Rubahn

    Electromagnetic actuation in MEMS switches

    100% CLIMATE NEUTRALITY Conference, Sønderborg, Denmark

    2015

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    A. Drimus, Stefan Mátéfi-Tempfli

    Tactile shoe inlays for high speed pressure monitoring

    Intelligent Robotics and Applications, Berlin, vol. 9245

    2015

    ISBN: 978-3-319-22876-1

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    R. Brehm, S. Top, Stefan Mátéfi-Tempfli

    A distributed multi-agent linear bi-objective algorithm for energy flow optimization in microgrids

    3rd International Renewable and Sustainable Energy Conference (IRSEC'15), Marrakech-Ouarzazate, Morocco

    2015

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    P. Farhang, A. Drimus, Stefan Mátéfi-Tempfli

    New technique for voltage tracking control of a boost converter based on the PSO algorithm and LTspice

    2015 56th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)

    2015

    DOI: 10.1109/RTUCON.2015.7343157

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    L. Duggen, Stefan Mátéfi-Tempfli

    Forces in Liquid Metal Contacts

    ASME 12th Biennial Conference on Engineering Systems Design and Analysis - ESDA 2014, Kopenhagen, Dänemark

    2014

    NachhaltigEuropan Campus Rottal-Inn

    Vortrag

    A. Drimus, V. Jankovics, M. Gorsic, Stefan Mátéfi-Tempfli

    High Resolution Tactile Sensors for Curved Robotic Fingertips

    3rd International Conference on "Living Machines", Mailand, Italien

    2014

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Vortrag

    Stefan Mátéfi-Tempfli

    Mechatronics

    Track chair

    ASME 2014: 12th Biennial Conference on Engineering Systems Design and Analysis : Engineering Systems; Heat Transfer and Thermal Engineering; Materials and Tribology; Mechatronics; Robotics, Copenhagen, Denmark

    2014

    NachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    L. Duggen, Stefan Mátéfi-Tempfli

    Forces in Liquid Metal Contacts

    Proceedings of the ASME 12th Biennial Conference on Engineering Systems Design and Analysis--2014, New York, N.Y.

    2014

    ISBN: 978-0-7918-4585-1

    DOI: 10.1115/ESDA2014-20114

    Abstract anzeigen

    Using rather well known theory about capillary bridges between two electrodes we calculate the tensile force that can be applied to liquid metal contacts in the micrometer regime. Assuming circular symmetry, full wetting of the electrodes, and neglecting gravity, we present a brief review of the necessary theory and find numerically the forces to be in the 100μN range for liquid metals as mercury and liquid Gallium suspended between electrodes of 20μm radius.