Publikationen


Suche nach „[2020]“ hat 33 Publikationen gefunden
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    DigitalInstitut für Existenzgründung

    Buch (Monographie)

    Thomas Bartscher, R. Nissen

    Digital Target: Kompetenzmanagement für die Digitale Transformation

    2020

    DigitalInstitut für Existenzgründung

    Buch (Monographie)

    Thomas Bartscher, R. Nissen

    Fluides Personalmanagement: Die Digitale Transformation als Herausforderung und Chance begreifen

    2020

    DigitalInstitut für Existenzgründung

    Internetdokument

    Thomas Bartscher, R. Nissen

    Lernstrategien entwickeln – Kompetenzquellen entdecken. Mediendidaktische Lerneinheit des OPEN vhb-Kurses „Digitale Arbeitswelt. Herausforderungen und Chancen“

    2020

    DigitalInstitut für Existenzgründung

    Internetdokument

    Thomas Bartscher, R. Nissen

    Landkarten für die digitale Kompetenz. Mediendidaktische Lerneinheit des OPEN vhb-Kurses „Digitale Arbeitswelt. Herausforderungen und Chancen“

    2020

    DigitalInstitut für Existenzgründung

    Internetdokument

    Thomas Bartscher, R. Nissen

    Digitale Zukunftsfähigkeit. Mediendidaktische Lerneinheit des OPEN vhb-Kurses „Digitale Arbeitswelt. Herausforderungen und Chancen“,

    2020

    DigitalInstitut für Existenzgründung

    Internetdokument

    Thomas Bartscher, R. Nissen

    Digitale Basiskompetenzen. Mediendidaktische Lerneinheit des OPEN vhb-Kurses „Digitale Arbeitswelt. Herausforderungen und Chancen“

    2020

    NachhaltigTC Weißenburg

    Zeitschriftenartikel

    Wang, J., Dmitry Rychkov, Q. Nguyen, Gerhard, R.

    The influence of orthophosphoric-acid surface modification on charge-storage enhancement in polypropylene electrets

    Journal of Applied Physics, vol. 128, no. 3

    2020

    DOI: 10.1063/5.0013805

    Abstract anzeigen

    Bipolar electrets from polypropylene (PP) are essential, e.g., in electret air filters and in cellular-foam ferroelectrets. Therefore, the mechanism of surface-charge stability enhancement on PP electrets via orthophosphoric-acid surface treatment is investigated in detail. It is shown that the significant charge-stability enhancement can be mainly attributed to deeper surface traps originating from deposited chemicals and topographic features on the modified surfaces. Thermally stimulated discharge of chemically treated and non-treated PP films with different surface-charge densities is used to test the limits of the newly formed deep traps in terms of the capacity for hosting surface charges. When the initial surface-charge density is very high, more charges are forced into shallower original traps on the surface or in the bulk of the treated PP samples, reducing the effect of the deeper surface traps brought by the surface modification. The well-known crossover phenomenon (of the surface-charge decay curves) has been observed between modified PP electrets charged to ±2 kV and to ±3  kV. Acoustically probed charge distributions in the thickness direction of PP electrets at different stages of thermal discharging indicate that the deep surface trapping sites may have preference for negative charges, resulting in the observed asymmetric charge stability of the modified PP films.

    GesundAngewandte GesundheitswissenschaftenInstitut Betriebliches Gesundheitsmanagement u. Arbeitssicherheit

    Zeitschriftenartikel

    Stephan Gronwald, Jasmin Weber

    Betriebliches Gesundheitsmanagement in der Pflegeausbildung

    PADUA - Die Fachzeitschrift für Pflegepädagogik, Patientenedukation und -bildung, vol. 15, no. 1, pp. 38-42

    2020

    DOI: 10.1024/1861-6186/a000533

    Abstract anzeigen

    Die Arbeitsbedingungen in der Pflege frühzeitig in die richtigen Wege zu leiten, beginnt bereits bei der Ausbildung des Pflegefachpersonals. Sowohl Lehrende als auch Auszubildende brauchen grundlegende Kenntnisse, wie sie die Arbeit mitgestalten können. Die Erweiterung des Curriculums um die Kompetenzen eines systemischen Prozessberaters für betriebliches Gesundheitsmanagement bringt dabei für beide Seiten Vorteile.

    DigitalNachhaltigFraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    Gabriel Herl, Jochen Hiller, A. Maier

    Scanning trajectory optimisation using a quantitative Tuybased local quality estimation for robot-based X-ray computed tomography

    Nondestructive Testing and Evaluation, vol. (Published 21 June 2020), no. 6

    2020

    DOI: 10.1080/10589759.2020.1774579

    Abstract anzeigen

    Robotic CT systems allow complex scanning trajectories. This work presents a workflow to automatically calculate optimised scanning trajectories for robotic CT systems. In particular, as a local quality estimation, this work introduces a quantitative measure to quantify local reconstruction quality based on the Tuy conditions. The proposed method is tested in two summation experiments using an STL model of a motorcycle. In both experiments, a trajectory is calculated using a quantitative Tuy-based local quality estimation and the reconstruction result is then compared to reconstructions using conventional scanning trajectories. The comparison results indicate that the proposed approach automatically finds trajectories that enable 3D reconstructions with high image quality using much less projection data, which allows a significant reduction of scanning time.

    DigitalNachhaltigFraunhofer AWZ CTMTMaschinenbau und Mechatronik

    Zeitschriftenartikel

    A. Stock, Gabriel Herl, T. Sauer, Jochen Hiller

    Edge-preserving compression of CT scans using wavelets

    Insight - Non-Destructive Testing and Condition Monitoring, vol. 62, no. 6, pp. 345-351

    2020

    DOI: 10.1784/insi.2020.62.6.345

    Abstract anzeigen

    This work addresses the subject of efficient storage of computed tomography (CT) data with an emphasis on the quality of surfaces. Industrial dimensional metrology often requires high measurement accuracy and it is shown that this is retained using wavelet-based compression methods. The applied techniques include a tensor product wavelet transform and soft wavelet shrinkage. In these tests, performed on real objects, dimensional CT measurements of compressed and uncompressed volumes were compared. The necessary storage space was reduced significantly with a negligible loss of accuracy. The storage space required for a multi-sphere phantom was decreased to 4.7% (from 638 MB to 30 MB), with an average deviation below 1 μm from the original volume.

    DigitalNachhaltigTC Parsberg/Lupburg

    Zeitschriftenartikel

    Anton Schmailzl, Johannes Käsbauer, J. Martan, P. Honnerová, F. Schäfer, M. Fichtl, T. Lehrer, L. Prušáková, J. Tesař, J. Skála, M. Honner

    Measurement of core temperature through semi-transparent polyamide 6 using scanner-integrated pyrometer in laser welding

    International Journal of Heat and Mass Transfer, vol. 146, no. January

    2020

    DOI: 10.1016/j.ijheatmasstransfer.2019.118814

    Abstract anzeigen

    Predicting the core temperature during welding is an ambitious aim in many research works. In this work, a 3D-scanner with integrated pyrometer is characterized and used to measure the temperature during quasi-simultaneous laser transmission welding of polyamide 6. However, due to welding in an overlap configuration, the heat radiation emitted from the joining zone of a laser transmission weld has to pass through the upper polymer, which is itself a semi-transparent emitter. Therefore, the spectral filtering of the heat radiation in the upper polymer is taken into account by calibrating the pyrometer for the measurement task. Thermal process simulations are performed to compare the temperature field with the measured temperature signal. The absorption coefficients of the polymers are measured, in order to get precise results from the computation. The temperature signals during welding are in good agreement with the computed mean temperature inside the detection spot, located in the joining area. This is also true for varying laser power, laser beam diameter and the carbon black content in the lower polymer. Both, the computed mean temperature and the temperature signal are representing the core temperature. In order to evaluate the spatial sensitivity of the measurement system, the emitted heat radiation from both polymers is calculated on basis of the computed temperature field. Hereby it is found, that more than 90 percent of the detected heat radiation comes from the joining area, which is a crucial information for contact-free temperature measurement tasks on semi-transparent polymers.

    DigitalNachhaltigTC Parsberg/Lupburg

    Zeitschriftenartikel

    Johannes Käsbauer, Anton Schmailzl, J. Prehm, T. Loose, Stefan Hierl

    Simulation of Quasi-Simultaneous Laser Transmission Welding of Plastics: Optimization of Material Parameters in Broad Temperature Range

    [Accepted for publication]

    Procedia CIRP

    2020

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Zeitschriftenartikel

    Armin Reif, P. Rinck, Sebastian Sitzberger, Rolf Rascher, M. Zäh

    Zerspanung von Hochleistungswerkstoffen mit ultrasonisch modulierter Schnittgeschwindigkeit

    ZWF - Zeitschrift für wirtschaftlichen Fabrikbetrieb, vol. 115, no. 3, pp. 2-5

    2020

    DOI: 10.3139/104.112255

    Abstract anzeigen

    Die steigenden Anforderungen an die Festigkeit und die Qualität von Bauteilen und die damit verbundene Verwendung hochfester Materialien erfordert die Weiterentwicklung neuer wirtschaftlicher Zerspanungstechniken. Durch eine werkzeugseitige Schwingungsüberlagerung können bei der Bearbeitung von schwer zerspanbaren Werkstoffen die Zerspankräfte und der Werkzeugverschleiß reduziert sowie die Oberflächenqualität verbessert werden.

    NachhaltigElektrotechnik und MedientechnikIQMA

    Zeitschriftenartikel

    H. Fan, Y. Zhang, D. Liu, C. Niu, L. Liu, W. Ni, Y. Xia, Z. Bi, Günther Benstetter, G. Lei

    Tensile stress-driven cracking of W fuzz over W crystal under fusion-relevant He ion irradiations

    Nuclear Fusion, vol. 60, no. 4

    2020

    DOI: 10.1088/1741-4326/ab71bb

    Abstract anzeigen

    Although W fuzz is formed in the divertor region of the fusion reactor, no theory may clearly explain the W fuzz growth mechanism. In this study, we observe the growth process of W fuzz over W crystal under ITER-relevant He ion irradiations. We propose the tensile stress-driven cracking of nano-structured fuzz during the initial growth of W fuzz. We demonstrate that the existence of tensile stress is due to the swelling of He nano-bubbles in the fuzz. After this cracking, the W fuzz breaks away from the planar network and grows over the W surface, where the micro-stress in the W surface layer acts as the driving force.

    NachhaltigTC Teisnach 2 Sensorik

    Patent

    R. Berger, W. Lehnert, G. Metzger-Brueckl, Günther Ruhl, R. Rupp

    Wafer composite and method for producing semiconductor components

    2020

    NachhaltigTC Teisnach 2 Sensorik

    Patent

    R. Rupp, Günther Ruhl, H.-J. Schulze

    Silicon carbide semiconductor device and a method for forming a silicon carbide semiconductor device

    2020

    Elektrotechnik und Medientechnik

    Zeitschriftenartikel

    H. Heckelmüller, F. Kendl, Gerhard Krump

    TDR Einzahlwert zur Charakterisierung der dynamischen Oberbausteifigkeit

    ZEVrail - Zeitschrift für das gesamte System Bahn, vol. 144, no. Mai, pp. 190-194

    2020

    Abstract anzeigen

    Der Schallmesswagen (SMW) der DB Systemtechnik prüft den akustischen Zustand des Oberbaus und wird vor allem zur Überprüfung von Streckenabschnitten mit der Maßnahme „Besonders überwachtes Gleis“ (BüG) verwendet. Zusätzlich wird der SMW zur Qualitätskontrolle und Abnahme des akustischen Schienenschleifens eingesetzt. Falls ein BüG-Abschnitt nicht vom SMW befahren werden kann, gilt seit 2001 die Ersatzmaßnahme RMF-BüG. Dieses Verfahren soll die Messaufgaben des SMW durch kontinuierliche Rauheitsmessungen beider Schienen ersatzweise übernehmen können. Beim RMF-BüG-Verfahren wurde zur Berechnung des SMW-Pegels ausschließlich die Schienenrauheit berücksichtigt. Anhand einer Vielzahl von Messungen konnte gezeigt werden, dass das Rollgeräusch des SMW signifikant ebenfalls von der Gleisabklingrate (Track Decay Rate TDR) abhängig ist. Das vorgestellte Verfahren zeigt die Verwendung des Einzahlwertes der Schienenrauheit LλCA und des Einzahlwertes der TDR L TDR zur Bestimmung des SMW-Pegels.

    GesundEuropan Campus Rottal-Inn

    Zeitschriftenartikel

    T. Talanow, Anna-Maria Kasparbauer, J. Lippold, B. Weber, U. Ettinger

    Neural Correlates of Proactive and Reactive Inhibition of Saccadic Eye Movements

    Brain Imaging and Behavior, vol. 14, pp. 72-88

    2020

    DOI: 10.1007/s11682-018-9972-3

    Abstract anzeigen

    Although research on goal-directed, proactive inhibitory control (IC) and stimulus-driven, reactive IC is growing, no previous study has compared proactive IC in conditions of uncertainty with regard to upcoming inhibition to conditions of certain upcoming IC. Therefore, we investigated effects of certainty and uncertainty on behavior and blood oxygen level dependent (BOLD) signal in proactive and reactive IC. In two studies, healthy adults performed saccadic go/no-go and prosaccade/antisaccade tasks. The certainty manipulation had a highly significant behavioral effect in both studies, with inhibitory control being more successful under certain than uncertain conditions on both tasks (p ≤ 0.001). Saccadic go responses were significantly less efficient under conditions of uncertainty than certain responding (p < 0.001). Event-related functional magnetic resonance imaging (fMRI) (one study) revealed a dissociation of certainty- and uncertainty-related proactive inhibitory neural correlates in the go/no-go task, with lateral and medial prefrontal and occipital cortex showing stronger deactivations during uncertainty than during certain upcoming inhibition, and lateral parietal cortex being activated more strongly during certain upcoming inhibition than uncertainty or certain upcoming responding. In the antisaccade task, proactive BOLD effects arose due to stronger deactivations in uncertain response conditions of both tasks and before certain prosaccades than antisaccades. Reactive inhibition-related BOLD increases occurred in inferior parietal cortex and supramarginal gyrus (SMG) in the go/no-go task only. Proactive IC may imply focusing attention on the external environment for encoding salient or alerting events as well as inhibitory mechanisms that reduce potentially distracting neural processes. SMG and inferior parietal cortex may play an important role in both proactive and reactive IC of saccades.

    Angewandte Wirtschaftswissenschaften

    Zeitschriftenartikel

    Marcus Dittrich, S. Städter

    Monitoring 'lemons': Why lower productivity workers are sometimes monitored more closely

    Applied Economics Letters, no. Published: 18 June 2020

    2020

    DOI: 10.1080/13504851.2020.1776826

    Abstract anzeigen

    We analyse workplace monitoring in a principal–agent model with two types of workers who differ in their productivity. The firm decides on the effort level, the wage and the monitoring intensity for both workers. We find that the elasticities of the workers’ effort-cost function and the firm’s monitoring-cost function affect the firm’s monitoring intensity. Our results imply that the firm might monitor the low-productive worker more closely than the high-productive worker.

    NachhaltigAngewandte Naturwissenschaften und Wirtschaftsingenieurwesen

    Zeitschriftenartikel

    Thomas Stirner, David Scholz, J. Sun

    Convergence of surface energy calculations for various methods: (001), (012), (100) hematite and the applicability of the standard approach

    Journal of Physics: Condensed Matter, vol. 32, no. 18

    2020

    DOI: 10.1088/1361-648X/ab6f88

    Abstract anzeigen

    Three different methods for the calculation of the surface energy, namely the standard approach, the Boettger relation and the linear-fit method, are applied to the (0 0 1), (0 1 2) and (1 0 0) hematite surfaces. The standard approach was previously shown to suffer from a divergence problem, and the Boettger relation was shown to exhibit quantum size effects. While the linear-fit method, in general, leads to a good convergence behavior of the surface energy, the questions arise whether the relative order of the calculated surface energies depends on the chosen calculation method, and whether there is any merit at all in employing the standard approach. The present work investigates these questions with hematite as a benchmark material system. The simulations show that, for the surface facets and slab thicknesses studied here, the relative order of the surface energies is unaffected by the chosen calculation method. A regime is found where the three methods are in reasonably good agreement with respect to the obtained surface energies. Finally, a procedure is put forward to extract meaningful surface energy values from the standard approach.