Publikationen


6358 Publikationen gefunden
    DigitalAngewandte Informatik

    Zeitschriftenartikel

    A. Aldahlooh, E. Masala, G. Wallendael, P. Lambert, Marcus Barkowsky

    Improving relevant subjective testing for validation: Comparing machine learning algorithms for finding similarities in VQA datasets using objective measures

    Signal Processing: Image Communication, vol. 74, no. May, pp. 32-41

    2019

    DOI: 10.1016/j.image.2019.01.004

    Abstract anzeigen

    Subjective quality assessment is a necessary activity to validate objective measures or to assess the performance of innovative video processing technologies. However, designing and performing comprehensive tests requires expertise and a large effort especially for the execution part. In this work we propose a methodology that, given a set of processed video sequences prepared by video quality experts, attempts to reduce the number of subjective tests by selecting a subset with minimum size which is expected to yield the same conclusions of the larger set. To this aim, we combine information coming from different types of objective quality metrics with clustering and machine learning algorithms that perform the actual selection, therefore reducing the required subjective assessment effort while trying to preserve the variety of content and conditions needed to ensure the validity of the conclusions. Experiments are conducted on one of the largest publicly available subjectively annotated video sequence dataset. As performance criterion, we chose the validation criteria for video quality measurement algorithms established by the International Telecommunication Union.

    DigitalAngewandte Informatik

    Zeitschriftenartikel

    T. Mizdos, Marcus Barkowsky, M. Uhrina, P. Pocta

    Linking Bitstream Information to QoE: A Study on Still Images Using HEVC Intra Coding

    Advances in Electrical and Electronic Engineering, vol. 17, no. 4, pp. 436-445

    2019

    DOI: 10.15598/aeee.v17i4.3625

    Abstract anzeigen

    The coding tools used in image and video encoders aim at high perceptual quality for low bitrates. Analyzing the results of the encoders in terms of quantization parameter, image partitioning, prediction modes or residuals may provide important insight into the link between those tools and the human perception. As a first step, this contribution analyzes the possibility to transcode reference images of three well-known image databases, i.e. IRCCyN/IVC, LIVE and TID2013, from their original, older formats to HEVC; thus creating a homogeneous database of 327 HEVC encoded images accompanied with bitstream parameters and values obtained from objective and subjective assessments. Secondly, it analyzes some of the HEVC intra coding parameters regarding their influence on the image quality by using machine learning, namely Support Vector Machine - Regression.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Sebastian Sitzberger, P. Rinck, A. Gueray, Rolf Rascher

    Ultraschallunterstützte Zerspanung von Advanced Materials

    3. Wissenschaftliches Forum zur ULTRASONIC-Bearbeitung, Jena

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenIPH Teisnach

    Vortrag

    Sebastian Sitzberger, Jakob Reitberger, Rolf Rascher

    Clamping system for optical components for adaptation in optical production

    10th HLEM 2019 - High Level Expert Meeting Asphere Metrology on Joint Investigations, Braunschweig

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Zeitschriftenartikel

    Benedikt Scharfe, S. Lehmann, Thorsten Gerdes, D. Brüggemann

    Optical and Mechanical Properties of Highly Transparent Glass-Flake Composites

    Journal of Composites Science, vol. 3, no. 101, pp. 1-17

    2019

    DOI: 10.3390/jcs3040101

    Abstract anzeigen

    In this paper, the dynamic mechanic and optical properties of composites made of Polyvinyl Butyral (PVB) and Micro Glass Flakes (MGF) with matching refractive indices (RIs) are investigated. The composite is produced by a slurry-based process using additional blade casting and lamination. It can be shown that a high degree of ordering of the MGF in the polymer matrix can be achieved with this method. This ordering, combined with the platelet-like structure of the MGF, leads to very efficient strengthening of the PVB with increasing content of the MGF. By carefully adjusting the RIs of the polymer, it is shown that haze is reduced to below 2%, which has not been achieved with irregular fillers or glass fibers.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Zeitschriftenartikel

    L. Schwinger, S. Lehmann, L. Zielbauer, Benedikt Scharfe, Thorsten Gerdes

    Aluminum Coated Micro Glass Spheres to Increase the Infrared Reflectance

    Coatings (Special Issue "Current Research in Thin Film Deposition: Applications, Theory, Processing, and Characterisation"), vol. 9, no. 3

    2019

    DOI: 10.3390/coatings9030187

    Abstract anzeigen

    The reflective properties of micro glass spheres (MGS) such as Solid Micro Glass Spheres (SMGS, “glass beads”) and Micro Hollow Glass Spheres (MHGS, “glass bubbles”) are utilized in various applications, for example, as retro-reflector for traffic road stripe paints or facade paints. The reflection behavior of the spheres can be further adapted by coating the surfaces of the spheres, e.g., by titanium dioxide or a metallic coating. Such coated spheres can be employed as, e.g., mid infrared (MIR)-reflective additives in wall paints to increase the thermal comfort in rooms. As a result, the demand of heating energy can be reduced. In this paper, the increase of the MIR-reflectance by applying an aluminum coating on MGS is discussed. Aluminum coatings are normally produced via the well-known Physical Vapor Deposition (PVD) or Chemical Vapor Deposition (CVD). In our work, the Liquid Phase Deposition (LPD) method, as a new, non-vacuum method for aluminum coating on spherical spheres, is investigated as an alternative, scalable, and simple coating process. The LPD-coating is characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX), scanning electron microscopy (SEM), and reflection measurements. The results are compared to a reference PVD-coating. It is shown that both sphere types, SMGS and MHGS, can be homogeneously coated with metallic aluminum using the LPD method but the surface morphology plays an important role concerning the reflection properties. With the SMGS, a smooth surface morphology and a reflectance increase to a value of 30% can be obtained. Due to a structured surface morphology, a reflection of only 5% could be achieved with the MHGS. However, post-treatments showed that a further increase is possible.

    NachhaltigElektrotechnik und MedientechnikIQMA

    Vortrag

    Christoph Metzke, Günther Benstetter, Werner Frammelsberger, Jonas Weber, F. Kühnel

    Temperature dependent investigation of hexagonal boron nitride films using scanning thermal microscopy

    Poster presentation

    6th Nano Today Conference 2019, Lisbon, Portugal

    2019

    NachhaltigElektrotechnik und MedientechnikIQMA

    Zeitschriftenartikel

    Z. Bi, D. Liu, Y. Zhang, L. Liu, Y. Xia, Y. Hong, H. Fan, Günther Benstetter, G. Lei, L. Yan

    The evolution of He nanobubbles in tungsten under fusion-relevant He ion irradiation conditions

    Nuclear Fusion, vol. 59, no. 8

    2019

    DOI: 10.1088/1741-4326/ab2472

    Abstract anzeigen

    He-induced W nanofuzz growth over the W divertor target is one of the main limiting factors affecting the current design and development of fusion reactors. In this paper, based on He reaction rate model in W, we simulate the growth and evolution of He nanobubbles during W nanofuzz formation under fusion-relevant He+ irradiation conditions. Our modeling unveils the existence of He nanobubble-enriched W surface layer (<10 nm), formed due to the He diffusion in W crystal into defect sites. At an elevated temperature, the growth of He bubbles in the W surface layer prevents He atoms diffusing into the deep layer (>10 nm). The formation of W nanofuzz at the surface is attributed to surface bursting of high-density He bubbles with their radius of ~4 nm, and an increase in the surface area of irradiated W. Our findings have been well confirmed by the experimental measurements.

    NachhaltigElektrotechnik und MedientechnikIQMA

    Zeitschriftenartikel

    W. Ni, L. Liu, Y. Zhang, H. Fan, G. Song, D. Liu, Günther Benstetter, G. Lei

    Mass loss of pure W, W-Re alloys, and oxide dispersed W under ITER-relevant He ion irradiations

    Journal of Nuclear Materials, vol. 527

    2019

    DOI: 10.1016/j.jnucmat.2019.151800

    Abstract anzeigen

    In this study, polycrystalline W, W-Re alloys, and La2O3 and Y2O3 dispersion-strengthened W have been irradiated by our large-power materials irradiation experimental system (LP-MIES) at the irradiation temperature of 1360–1460 K. Our measurements show that the W nano-fuzz layer which is < 5.2 μm thick has been formed over all the specimens exposed to the low-energy (50 or 100 eV) and high-flux (1.37 × 1022–1.62 × 1022 ions/m2⋅s) He+ irradiations. The mass loss of the fuzz layer almost linearly increases with the He+ fluence, which does not show any dependence on the thickness of fuzz layer varying from 1.1 to 5.2 μm La2O3 and Y2O3 dispersions into W significantly suppress the growth of W fuzz, indicating that He diffusion and the evolution of He nano-bubbles in the near-surface can be significantly influenced due to the dispersion. After He+ (100 eV) irradiation at He+ fluence of 5.83 × 1026/m2, the mass loss of 0.1 vol% - 1.0 vol% La2O3-dispersed W is about 20% lower than the one of the pure W, and the La2O3 dispersed W exhibits the best erosion resistance among various W material grades. Our analysis indicates that both the surface sputtering of W fuzz by energetic ions and surface bursting of He nano-bubbles can be responsible for the mass loss of W under ITER-relevant He+ irradiations.

    NachhaltigElektrotechnik und MedientechnikIQMA

    Zeitschriftenartikel

    C. Wen, X. Jing, F. Hitzel, C. Pan, Günther Benstetter, M. Lanza

    In Situ Observation of Current Generation in ZnO Nanowire Based Nanogenerators Using a CAFM Integrated into an SEM

    ACS Applied Materials & Interfaces, vol. 11, no. 17, pp. 15183-15188

    2019

    DOI: 10.1021/acsami.9b00447

    Abstract anzeigen

    In this work, we monitor in situ the movement of ZnO piezoelectric nanowires by using a conductive atomic force microscope integrated into a scanning electron microscope. This setup allows seeing the bending of the nanowires and simultaneously measuring the currents generated. We conclude that the currents generated not only come from piezoelectric effect, but also from contact potential and triboelectric effect. These contributions have been ignored in all previous reports in this field, meaning that the power conversion efficiency of these devices may have been systematically overestimated. Our study helps to clarify the working mechanism of piezoelectric nanogenerators based on ZnO nanowires.

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTC Teisnach Sensorik

    Vortrag

    Alois Kasberger, Raimund Förg

    Heißprägen von Glassubstraten als Basis kapazitiver Ultraschall-Sensorik

    2. Technologietag Angewandte Sensorik (TAS), Coburg

    2019

    DigitalAngewandte Informatik

    Vortrag

    Andreas Grzemba

    Cyber Security für IoT-Geräte

    1. Internet of Things und Industrial Internet of Things Kongress, Regensburg

    2019

    DigitalAngewandte Informatik

    Vortrag

    Andreas Grzemba

    Decentralized Anomaly Detection with Unused Computing Power in Avionic and Automotive Applications

    Kaspersky Industrial Cyber Security Conference 2019, Sochi, Russia

    2019

    GesundNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    S. Markov, Georg Steckenbauer, Markus Pillmayer, Marcus Herntrei

    Austria: The forest as a touristic landscape

    International Handbook of Forest Therapy

    2019

    ISBN: 978-1-5275-3955-6

    GesundNachhaltigEuropan Campus Rottal-Inn

    Beitrag (Sammelband oder Tagungsband)

    Georg Steckenbauer, R. Weisböck-Erdheim, S. Tischler, C. Pichler, A. Hartl

    Nutzung und Inszenierung natürlicher Ressourcen im Gesundheitstourismus

    Experience Design im Tourismus – eine Branche im Wandel, Wiesbaden

    2019

    ISBN: 978-3-658-24512-2

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Vortrag

    Harald Zimmermann

    The Usage of AI for Glass Process Optimization

    Şişecam International Glass Conference, Istanbul, Türkei

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Vortrag

    Harald Zimmermann

    Sensorik und Prozessoptimierung als Bausteine für nachhaltige Ressourcenschonung

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Vortrag

    Harald Zimmermann

    Lean- & Prozessmanagement

    BPM-Club Expertendialog: Integrierte Managementsysteme, Frankfurt am Main

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Vortrag

    Harald Zimmermann

    Glass Industry 4.0

    GlassTrend Seminar "Process automation & big data", München-Pullach

    2019

    NachhaltigAngewandte Naturwissenschaften und WirtschaftsingenieurwesenTAZ Spiegelau

    Vortrag

    Harald Zimmermann

    Die Milchflasche aus Glas: Relikt oder Trendsetter?

    3. Internationale Verpackungskonferenz, Kempten

    2019