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Suche nach „[Europan Campus Rottal-Inn]“ hat 381 Publikationen gefunden
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    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    S. Shamakhyan, S. Tiratsuyan, H. Mkrtchian, Georgi Chaltikyan, A. Avoyan, I. Buliev, V. Buniatyan, T. Saghatelyan, R. Aghgashyan, H. Vardapetyan, V. Begoyan

    Current State of Biomedical Engineering Education in Armenia and Perspectives of Development with TEMPUS IV BME-ENA Project

    6th European Conference of the International Federation for Medical and Biological Engineering, Cham, vol. 45

    2015

    ISBN: 978-3-319-11127-8

    DOI: 10.1007/978-3-319-11128-5_252

    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

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    W. Jäger, X.-N. Chen, A. Rineiski, Rui Li

    Macroscopic pin bundle model and its blockage simulations

    Energy Conversion and Management, vol. 91, pp. 93-100

    2015

    DOI: 10.1016/j.enconman.2014.11.053

    Abstract anzeigen

    In this paper a macroscopic continuum differential model of pin bundle flow is proposed and developed for computational fluid dynamics (CFD) simulations of a reactor core. Thereby the pin bundle flow is regarded as a porous medium flow that is characterized by a certain coolant volume fraction and an associated wet area. The frictional drags experienced by pins and wrappers in the axial and radial directions are converted to pressure drops, i.e. momentum exchange terms, which are therefore anisotropic from the macroscopic point of view. Such a model reduces the number of CFD meshes very much and can be applied for a whole reactor core flow simulation without losing details of subchannel flow. In particular the model is implemented in the SIMMER-III code and applied for the MYRRHA reactor design. A steady state of subchannel flow, which is considerably non-uniform in the radial direction, is investigated and compared with a subchannel code. Satisfactory agreements are achieved. As a practical example the subchannel blockage in the central channels is considered and simulated. The scenario of pin failure and fuel sweep-out is expected, but it can take place already at 50% area blockage in a fuel assembly, if the blockage is located at the entrance of the active zone.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    X.-N. Chen, A. Rineiski, V. Moreau, Rui Li

    Studies of fuel dispersion after pin failure: Analysis of assumed blockage accidents for the MYRRHA–FASTEF critical core

    Annals of Nuclear Energy, vol. 79, pp. 31-42

    2015

    DOI: 10.1016/j.anucene.2015.01.002

    Abstract anzeigen

    The present work has been carried out in the framework of the European FP7 project SEARCH, in which the MYRRHA demonstrator reactor is designed to be able to operate both in ADS mode and in critical mode using lead–bismuth eutectic (LBE) as primary coolant. According to the project task definition, the pin failure and fuel dispersion scenarios in severe accidents had to be extensively studied for reactor safety analysis. In this paper, the unprotected severe transients analyses for the MYRRHA–FASTEF critical core were performed using the SIMMER-III code. The aim of the current work is to obtain a deeper understanding of core material redistribution processes after pin damage. Since the fuel has almost the same density as the coolant, its pellets, chunks and particles will essentially be carried by the coolant flow, thus moving upwards out of the core and redistributing into the upper pool region and peripheral structures. Starting the simulations from the steady state configuration, relevant parameters reflect good agreement with the design operational conditions. For the transients, the most severe accident scenario proposed, that may possibly lead to pin failure and furthermore core damage, is the unprotected blockage accident (UBA). The calculation results show that after pin failure, the mobile fuel starts to re-distribute. In the meantime, the reactor stabilizes to shut-down status because of the fuel loss. Our results show that the blockage propagation is impossible thanks to the gap between fuel subassemblies.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    X.-N. Chen, A. Rineiski, W. Maschek, Rui Li, C. Matzerath Boccaccini

    Study on Severe Accident Scenarios: Pin Failure Possibility of MYRRHA-FASTEF Critical Core

    Energy Procedia, vol. 71, pp. 14-21

    2015

    DOI: 10.1016/j.egypro.2014.11.850

    Abstract anzeigen

    The present work is carried out within the European FP7 project SEARCH, in which the MYRRHA demonstrator reactor is designed to be able to operate both in ADS mode and in critical mode using lead-bismuth eutectic (LBE) as primary coolant. According to the project task definition, the pin failure and fuel dispersion scenarios in severe accidents have to be extensively studied for reactor safety analysis. In this paper, the unprotected severe transients analyses for the MYRRHA-FASTEF critical core were performed using SIMMER-III code. The aim of the current work was to obtain a deeper understanding of core material redistribution processes before and after pin damage, since the Archimedes force could move pellets, chunks and fuel particles upwards out of the core and redistribute them into the upper pool region and peripheral structures. Starting the simulations with the steady state calculation, relevant parameters reflect good agreement with the design operational conditions. For the transients three postulated severe accident scenarios were proposed that may possibly lead to pin failure and furthermore core damage: unprotected loss of flow (ULOF), unprotected transient overpower (UTOP) and unprotected blockage accident (UBA), where in particular the entrance of fuel assembly is blocked as a side window is still open. The three transients, starting from the steady state conditions, have been investigated. The calculation results show for the MYRRHA-FASTEF that under the conditions chosen all simulated transient cases do not lead to a pin failure and fuel redistribution.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    D. Zhang, E. Merle-Lucotte, X.-N. Chen, A. Rineiski, Rui Li

    Transient analyses for a molten salt fast reactor with optimized core geometry

    Nuclear Engineering and Design, vol. 292, no. October, pp. 164-176

    2015

    DOI: 10.1016/j.nucengdes.2015.06.011

    Abstract anzeigen

    Molten salt reactors (MSRs) have encountered a marked resurgence of interest over the past decades, highlighted by their inclusion as one of the six candidate reactors of the Generation IV advanced nuclear power systems. The present work is carried out in the framework of the European FP-7 project EVOL (Evaluation and Viability Of Liquid fuel fast reactor system). One of the project tasks is to report on safety analyses: calculations of reactor transients using various numerical codes for the molten salt fast reactor (MSFR) under different boundary conditions, assumptions, and for different selected scenarios. Based on the original reference core geometry, an optimized geometry was proposed by Rouch et al. (2014. Ann. Nucl. Energy 64, 449) on thermal-hydraulic design aspects to avoid a recirculation zone near the blanket which accumulates heat and very high temperature exceeding the salt boiling point. Using both fully neutronics thermal-hydraulic coupled codes (SIMMER and COUPLE), we also re-confirm the efforts step by step toward a core geometry without the recirculation zone in particular as concerns the modifications of the core geometrical shape. Different transients namely Unprotected Loss of Heat Sink (ULOHS), Unprotected Loss of Flow (ULOF), Unprotected Transient Over Power (UTOP), Fuel Salt Over Cooling (FSOC) are intensively investigated and discussed with the optimized core geometry. It is demonstrated that due to inherent negative feedbacks, an MSFR plant has a high safety potential.

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

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

    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

    DigitalGesundEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    J. Clauss, P. Friedrich, K. Herzog, A. Scholz, Thomas Spittler, B. Wolf

    Telemedizin - rundum gut betreut. Einsatzgebiete des telemedizinischen Netzwerkes COMES®

    4. Bulletin, pp. 33-37

    2014

    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    D. Polterauer, P. Friedrich, Thomas Spittler, B. Wolf

    Rehabilitation´s Aftercare by COMES®

    Proceedings of the 1st European Congress on e-Cardiology & e-Health, Selected Abstracts (October 29-31, 2014; Bern, Switzerland) , no. 2_suppl, pp. 38-44

    2014

    Abstract anzeigen

    Purpose: In Germany the demand of medical rehabilitation increases steadily. Nevertheless, the duration of rehabilitation is limited to three weeks, making an efficient and successful post-rehabilitative aftercare essential. Therefore, a telematic system called COMES® was developed at the Heinz Nixdorf Lehrstuhl der Technischen Universität München. One of the strength of COMES® is the possibility of therapy support, for example when suffering from cardiovascular disease. The physician sets a therapy goal and COMES® supports the patient by motivation feedback reaching that goal. Methods: For evaluating COMES® motivation feedback a field tests was designed and conducted. Therefore, ten study participants from the age of 40 to 66 were equipped with the COMES®-System. While the first week represents the baseline, the second week serves as getting familiarized and the third week shows participants’ activity with motivation messages. For statistical analysis nonparametric statistics, the Wilcoxon-Mann-Whitney test, were used, inter alia due to the small sample size. Results: All the participants significantly increased their physical activity, with a p value of p = 0.008. During baseline week the mean steps per day were about 4,690 with a standard deviation of 1,625 steps per day. After third week the mean daily number of steps increased by 2,240 with a standard deviation of 1,970 steps per day. Conclusion: COMES® enables both physicians and patients to maintain and individually adjust therapy guidelines for hypertonia. Thus, it leads to a consequent accomplishment of the after-care targets and prevents a creeping demotivation. First studies show, that there is a significant increase of participants’ physical activity due to the COMES® motivation messages.

    MobilEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    Georg Steckenbauer, C. Bauer-Krösbacher, D. Okorokoff, W. Vrzal, H. Payer

    The CultTour Analysis Tool: A Tool to Support Strategic Decision Making in Open-Space Heritage Sites

    Impulse in Zeiten des Wandels., Kufstein, Österreich

    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.

    DigitalNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

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

    High Resolution Tactile Sensors for Curved Robotic Fingertips

    Biomimetic and Biohybrid Systems, Cham, vol. 8608 : Lecture notes in artificial intelligence

    2014

    ISBN: 978-3-319-09435-9

    DOI: 10.1007/978-3-319-09435-9_37

    Abstract anzeigen

    Tactile sensing is a key element for various animals that interact with the environment and surrounding objects. Touch provides information about contact forces, torques and pressure distribution and by the means of exploration it provides object properties such as geometry, stiffness and texture[5]. For humans, extracting high level information from touch provides a better understanding of the objects manipulated while for insects it is essential for locomotion[3]. While robot designers have been using vision systems to provide the robot with information about its surroundings, this is not always trivial to obtain, dealing with limited accuracy, occlusions and calibration problems. In terms of sensors for static stimuli, such as pressure, there are a range of technologies that can be used to manufacture transducers with various results[5]. A simple approach is to use fingertips with a 6-DOF force-torque sensor for estimating contact conditions[1], but this only allows a single point of contact and is costly. In terms of fingertip and foot tip prototypes, tactile sensors are used for multi modal sensing, similar to biology, for pressure and dynamic stimuli. In this respect Hosoda et al. [4] propose an anthropomorphic fingertip which has randomly distributed straingauges and PVDF (polyvinylidene fluoride) transducers. In [7] a biomimetic tactile array is proposed that shows a low hysteresis and good sensitivity for skin like deformations.

    GesundAngewandte GesundheitswissenschaftenEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    Irmgard Tischner

    Obesity. Overview.

    Encyclopedia of critical psychology, New York

    2014

    ISBN: 9781461455820

    DigitalEuropan Campus Rottal-Inn

    Zeitschriftenartikel

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

    Novel high resolution tactile robotic fingertips

    IEEE SENSORS, pp. 791-794

    2014

    DOI: 10.1109/ICSENS.2014.6985118

    Abstract anzeigen

    This paper describes a novel robotic fingertip based on piezoresistive rubber that can sense pressure tactile stimuli with a high spatial resolution over curved surfaces. The working principle is based on a three-layer sandwich structure (conductive electrodes on top and bottom and piezoresistive rubber in the middle). For the conductive layers we use ring patterns of silver epoxy and flex PCB electrode arrays. The proposed sensorised fingertip has 60 sensitive regions (taxels) arranged in 5 rings and 12 columns that have a smooth pressure to resistance characteristic. Using the sensor with specialized data acquisition electronics that acquire 500 frames per second provides rich information regarding contact force, shape and angle for bio-inspired robotic fingertips. Furthermore, a model of estimating the force of contact based on values of the cells is proposed.

    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    P. Friedrich, Thomas Spittler, S. Köhl, R. Weiss, B. Wolf

    Care of Cardiovascular Disease With COMES®

    Proceedings of the 3rd IEEE International Conference on Consumer Electronics (ICCE) [September 8-11, 2013; Berlin]

    2013

    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    J. Clauss, P. Friedrich, K. Herzog, A. Scholz, Thomas Spittler, B. Wolf

    COMES®-Cognitive Medizinische Systeme für Diagnose und Therapie

    E-Health 2014, Solingen

    2013

    ISBN: 978-3-9814005-5-7

    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    P. Friedrich, P. Martius, Thomas Spittler, A. Orban, R. Weiss, B. Wolf

    Telemedizinische Assistenz in der akuten und nachsorgenden Rehabilitation

    Tagungsband des 6. Deutschen AAL-Kongresses "Lebensqualität im Wandel von Demografie und Technik", Berlin

    2013

    DigitalGesundEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    R. Weber, P. Friedrich, P. Martius, Thomas Spittler, J. Kneitz, B. Wolf

    Telemedizinische Anwendungsbeobachtung mit COMES® im klinischen und heimischen Umfeld.

    Tagungsband des 6. Deutschen AAL-Kongresses "Lebensqualität im Wandel von Demografie und Technik", Berlin

    2013

    NachhaltigEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    B. Rana, M. Mátéfi-Tempfli, M. Agrawal, A. Barman, R. Hicken, U.A.S. Al-Jarah, O. Dmytriiev, Gangmei P., L. Piraux, V. Kruglyak, Stefan Mátéfi-Tempfli, B. Mahato

    Static and dynamic magnetic properties of densely packed magnetic nanowire arrays

    Physical Review B, vol. 87, no. 17

    2013

    DOI: 10.1103/PhysRevB.87.174429

    Abstract anzeigen

    The static and dynamic magnetic properties of magnetic nanowire arrays with high packing density (>0.4) and wire diameter much greater than the exchange length have been studied by static and time-resolved magneto-optical Kerr effect measurements and micromagnetic simulations. The nanowires were formed by electrodeposition within a nanoporous template such that their symmetry axes lay normal to the plane of the substrate. A quantitative and systematic investigation has been made of the static and dynamic properties of the array, which lie between the limiting cases of a single wire and a continuous ferromagnetic thin film. In particular, the competition between anisotropies associated with the shape of the individual nanowires and that of the array as a whole has been studied. Measured and simulated hysteresis loops are largely anhysteretic with zero remanence, and the micromagnetic configuration is such that the net magnetization vanishes in directions orthogonal to the applied field. Simulations of the remanent state reveal antiferromagnetic alignment of the magnetization in adjacent nanowires and the formation of vortex flux closure structures at the ends of each nanowire. The excitation spectra obtained from experiment and micromagnetic simulations are in qualitative agreement for magnetic fields applied both parallel and perpendicular to the axes of the nanowires. For the field parallel to the nanowire axes, there is also good quantitative agreement between experiment and simulation. The resonant frequencies are initially found to decrease as the applied field is increased from remanence. This is the result of a change of mode profile within the plane of the array from nonuniform to uniform as the ground state evolves with increasing applied field. Quantitative differences between experimental and simulated spectra are observed when the field is applied perpendicular to the nanowire axes. The dependence of the magnetic excitation spectra upon the array packing density is explored, and dispersion curves for spin waves propagating within the array parallel to the nanowire axis are presented. Finally, a tunneling of end modes through the middle region of the nanowires was observed. The tunneling is more efficient for wires forming densely packed arrays, as a result of the extended penetration of the dynamic demagnetizing fields into the middle of the wires and due to the lowering of the tunneling barrier by the static demagnetizing field of the array.

    DigitalGesundEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    Georgi Chaltikyan, R. Hovhannisyan, A. Aroyan, A. Avoyan, T. Saghatelyan

    Current State, Recent Advances and Perspectives of Development of Healthcare Information and Communication Technologies in Armenia: A Review Article

    International Journal of Reliable and Quality E-Healthcare, vol. 2, no. 4, pp. 48-63

    2013

    DOI: 10.4018/ijrqeh.2013100105