@inproceedings{9613, abstract = {{The ability to openly evaluate products, locations and services is an achievement of the Web 2.0. It has never been easier to inform oneself about the quality of products or services and possible alternatives. Forming one’s own opinion based on the impressions of other people can lead to better experiences. However, this presupposes trust in one’s fellows as well as in the quality of the review platforms. In previous work on physician reviews and the corresponding websites, it was observed that there occurs faulty behavior by some reviewers and there were noteworthy differences in the technical implementation of the portals and in the efforts of site operators to maintain high quality reviews. These experiences raise new questions regarding what trust means on review platforms, how trust arises and how easily it can be destroyed.}}, author = {{Kersting, Joschka and Bäumer, Frederik Simon and Geierhos, Michaela}}, booktitle = {{Proceedings of the 4th International Conference on Internet of Things, Big Data and Security}}, editor = {{Ramachandran, Muthu and Walters, Robert and Wills, Gary and Méndez Muñoz, Víctor and Chang, Victor}}, isbn = {{978-989-758-369-8}}, keywords = {{Trust, Physician Reviews, Network Analysis}}, location = {{Heraklion, Greece}}, pages = {{147--155}}, publisher = {{SCITEPRESS}}, title = {{{In Reviews We Trust: But Should We? Experiences with Physician Review Websites}}}, year = {{2019}}, } @inproceedings{9708, abstract = {{Increased interconnectedness of multiple actors and digital resources in service eco-systems offer new opportunities for service innovation. In digitally transforming eco-systems, organizations need to explore and exploit innovation simultaneously, which is defined as ambidexterity. However, research on ambidextrous service innovation is scarce. We provide a systematic literature review based on the concepts of ambidexterity, offering two contributions. First, research strands are disconnected, emphasizing either exploration or exploitation of service innovation, despite an organizations’ need to accelerate innovation cycles of exploring and exploiting services. Second, a new framework for ambidextrous service innovation is provided, inspired by the dynamism and generative mechanisms of the ontologically related concept of organizational routines. The framework adopts the perspective of a mutually constitutive relationship between exploring new and exploiting current resources, activities, and knowledge. The findings remedy the scattered literature through a coherent perspective on service innovation that responds to organizations’ needs and guides future research.}}, author = {{Wolf, Verena}}, booktitle = {{Proceedings of the 14th International Conference on Wirtschaftsinformatik}}, keywords = {{Exploration, Exploitation, Service Innovation, Organizational Routines, Ambidexterity}}, location = {{Siegen, Germany}}, title = {{{Ambidexterity in Service Innovation Research: A Systematic Literature Review}}}, year = {{2019}}, } @article{11953, abstract = {{As flexible optical devices that can manipulate the phase and amplitude of light, metasurfaces would clearly benefit from directional optical properties. However, single layer metasurface systems consisting of two-dimensional nanoparticle arrays exhibit only a weak spatial asymmetry perpendicular to the surface and therefore have mostly symmetric transmission features. Here, we present a metasurface design principle for nonreciprocal polarization encryption of holographic images. Our approach is based on a two-layer plasmonic metasurface design that introduces a local asymmetry and generates a bidirectional functionality with full phase and amplitude control of the transmitted light. The encoded hologram is designed to appear in a particular linear cross-polarization channel, while it is disappearing in the reverse propagation direction. Hence, layered metasurface systems can feature asymmetric transmission with full phase and amplitude control and therefore expand the design freedom in nanoscale optical devices toward asymmetric information processing and security features for anticounterfeiting applications.}}, author = {{Frese, Daniel and Wei, Qunshuo and Wang, Yongtian and Huang, Lingling and Zentgraf, Thomas}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{6}}, pages = {{3976--3980}}, title = {{{Nonreciprocal Asymmetric Polarization Encryption by Layered Plasmonic Metasurfaces}}}, doi = {{10.1021/acs.nanolett.9b01298}}, volume = {{19}}, year = {{2019}}, } @article{11955, author = {{Li, Tianyou and Wei, Qunshuo and Reineke, Bernhard and Walter, Felicitas and Wang, Yongtian and Zentgraf, Thomas and Huang, Lingling}}, issn = {{1094-4087}}, journal = {{Optics Express}}, number = {{15}}, pages = {{21153--21162}}, title = {{{Reconfigurable metasurface hologram by utilizing addressable dynamic pixels}}}, doi = {{10.1364/oe.27.021153}}, volume = {{27}}, year = {{2019}}, } @article{12917, author = {{Reineke, Bernhard and Sain, Basudeb and Zhao, Ruizhe and Carletti, Luca and Liu, Bingyi and Huang, Lingling and de Angelis, Costantino and Zentgraf, Thomas}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{9}}, pages = {{6585–6591}}, title = {{{Silicon metasurfaces for third harmonic geometric phase manipulation and multiplexed holography}}}, doi = {{10.1021/acs.nanolett.9b02844}}, volume = {{19}}, year = {{2019}}, } @inproceedings{15478, abstract = {{Stratix 10 FPGA cards have a good potential for the acceleration of HPC workloads since the Stratix 10 product line introduces devices with a large number of DSP and memory blocks. The high level synthesis of OpenCL codes can play a fundamental role for FPGAs in HPC, because it allows to implement different designs with lower development effort compared to hand optimized HDL. However, Stratix 10 cards are still hard to fully exploit using the Intel FPGA SDK for OpenCL. The implementation of designs with thousands of concurrent arithmetic operations often suffers from place and route problems that limit the maximum frequency or entirely prevent a successful synthesis. In order to overcome these issues for the implementation of the matrix multiplication, we formulate Cannon's matrix multiplication algorithm with regard to its efficient synthesis within the FPGA logic. We obtain a two-level block algorithm, where the lower level sub-matrices are multiplied using our Cannon's algorithm implementation. Following this design approach with multiple compute units, we are able to get maximum frequencies close to and above 300 MHz with high utilization of DSP and memory blocks. This allows for performance results above 1 TeraFLOPS.}}, author = {{Gorlani, Paolo and Kenter, Tobias and Plessl, Christian}}, booktitle = {{Proceedings of the International Conference on Field-Programmable Technology (FPT)}}, publisher = {{IEEE}}, title = {{{OpenCL Implementation of Cannon's Matrix Multiplication Algorithm on Intel Stratix 10 FPGAs}}}, doi = {{10.1109/ICFPT47387.2019.00020}}, year = {{2019}}, } @article{15741, abstract = {{ In many cyber–physical systems, we encounter the problem of remote state estimation of geo- graphically distributed and remote physical processes. This paper studies the scheduling of sensor transmissions to estimate the states of multiple remote, dynamic processes. Information from the different sensors has to be transmitted to a central gateway over a wireless network for monitoring purposes, where typically fewer wireless channels are available than there are processes to be monitored. For effective estimation at the gateway, the sensors need to be scheduled appropriately, i.e., at each time instant one needs to decide which sensors have network access and which ones do not. To address this scheduling problem, we formulate an associated Markov decision process (MDP). This MDP is then solved using a Deep Q-Network, a recent deep reinforcement learning algorithm that is at once scalable and model-free. We compare our scheduling algorithm to popular scheduling algorithms such as round-robin and reduced-waiting-time, among others. Our algorithm is shown to significantly outperform these algorithms for many example scenario}}, author = {{Leong, Alex S. and Ramaswamy, Arunselvan and Quevedo, Daniel E. and Karl, Holger and Shi, Ling}}, issn = {{0005-1098}}, journal = {{Automatica}}, title = {{{Deep reinforcement learning for wireless sensor scheduling in cyber–physical systems}}}, doi = {{10.1016/j.automatica.2019.108759}}, year = {{2019}}, } @inproceedings{14852, abstract = {{In a variety of industrial applications, liquids are atomized to produce aerosols for further processing. Example applications are the coating of surfaces with paints, the application of ultra-thin adhesive layers and the atomization of fuels for the production of combustible dispersions. In this publication different atomizing principles (standing-wave, capillary-wave, vibrating-mesh) are examined and discussed. Using an optimized standing-wave system, tough liquids with viscosities of up to about 100 Pas could be successfully atomized.}}, author = {{Dunst, Paul and Bornmann, Peter and Hemsel, Tobias and Littmann, Walter and Sextro, Walter}}, booktitle = {{Conference Proceedings - The 4th Conference on MicroFluidic Handling Systems (MFHS2019)}}, editor = {{Lötters, Joost and Urban, Gerald}}, keywords = {{atomization, ultrasound, standing-wave, capillarywave, vibrating-mesh}}, location = {{Enschede, The Netherlands}}, pages = {{140--143}}, title = {{{Atomization of Fluids with Ultrasound}}}, year = {{2019}}, } @article{14870, author = {{Wei, Qunshuo and Sain, Basudeb and Wang, Yongtian and Reineke, Bernhard and Li, Xiaowei and Huang, Lingling and Zentgraf, Thomas}}, issn = {{1530-6984}}, journal = {{Nano Letters}}, number = {{12}}, pages = {{8964–8971}}, title = {{{Simultaneous Spectral and Spatial Modulation for Color Printing and Holography Using All-dielectric Metasurfaces}}}, doi = {{10.1021/acs.nanolett.9b03957}}, volume = {{19}}, year = {{2019}}, } @article{14904, abstract = {{Die Komplexität von Steuersystemen gewinnt in der Debatte um den internationalen Steuerwettbewerb zunehmend an Bedeutung. Im vorliegenden Beitrag erfolgt, basierend auf den Befragungsdaten, die dem Tax Complexity Index von Hoppe et al. (2019) zugrunde liegen, eine umfassende Gegenüberstellung der Komplexität der Steuersysteme von Deutschland und Österreich unter Berücksichtigung der Mittelwerte aller vom Index abgedeckten Länder. Die Steuergesetze weisen sowohl in Deutschland als auch in Österreich einen verhältnismäßig hohen Grad an Komplexität auf. Bei den steuerlichen Rahmenbedingungen fällt der Grad an Komplexität in beiden Ländern dagegen niedrig aus, wobei Österreich im Durchschnitt weniger komplex ist als Deutschland.}}, author = {{Hoppe, Thomas and Rechbauer, Martina and Sturm, Susann}}, journal = {{Steuer und Wirtschaft}}, number = {{4}}, pages = {{397--412}}, title = {{{Steuerkomplexität im Vergleich zwischen Deutschland und Österreich - Eine Analyse des Status quo}}}, volume = {{96}}, year = {{2019}}, } @inproceedings{13107, abstract = {{In this paper, we first outline a Hypothetical Learning Trajectory (HLT), which aims at a formal understanding of the rules for manipulating integers. The HLT is based on task formats, which promote algebraic thinking in terms of generalizing rules from the analysis of patterns and should be familiar to students from their mathematics education experiences in elementary school. Second, we analyze two students' actual learning process based on Peircean semiotics. The analysis shows that the actual learning process diverges from the hypothesized learning process in that the students do not relate the different levels of the diagrams in a way that allows them to extrapolate the rule for the subtraction of negative numbers. Based on this finding, we point out consequences for the design of the tasks.}}, author = {{Schumacher, Jan and Rezat, Sebastian}}, booktitle = {{Proceedings of the Eleventh Congress of the European Society for Research in Mathematics Education (CERME11, February 6 – 10, 2019)}}, editor = {{Jankvist, Uffe Thomas and Van den Heuvel-Panhuizen, Marja and Veldhuis, Michiel}}, keywords = {{diagrammatic reasoning, hypothetical learning trajectory, induction extrapolatory method, integers, negative numbers, permanence principle, semiotics}}, location = {{Utrecht}}, publisher = {{Freudenthal Group & Freudenthal Institute, Utrecht University and ERME}}, title = {{{A Hypothetical Learning Trajectory for the Learning of the Rules for Manipulating Integers}}}, year = {{2019}}, } @article{13121, author = {{Breitmayer, Bastian and Hasso, Tim and Pelster, Matthias}}, issn = {{0165-1765}}, journal = {{Economics Letters}}, title = {{{Culture and the disposition effect}}}, doi = {{10.1016/j.econlet.2019.108653}}, volume = {{184}}, year = {{2019}}, } @article{13122, author = {{Breitmayer, Bastian and Massari, Filippo and Pelster, Matthias}}, issn = {{1059-0560}}, journal = {{International Review of Economics & Finance}}, pages = {{443--464}}, title = {{{Swarm intelligence? Stock opinions of the crowd and stock returns}}}, doi = {{10.1016/j.iref.2019.08.006}}, volume = {{64}}, year = {{2019}}, } @article{13143, author = {{Claes, Leander and Hülskämper, Lars Moritz and Baumhögger, Elmar and Feldmann, Nadine and Chatwell, René Spencer and Vrabec, Jadran and Henning, Bernd}}, issn = {{2196-7113}}, journal = {{tm - Technisches Messen}}, pages = {{2--6}}, title = {{{Acoustic absorption measurement for the determination of the volume viscosity of pure fluids / Messverfahren für die akustischen Absorption zur Bestimmung der Volumenviskosität reiner Fluide}}}, doi = {{10.1515/teme-2019-0038}}, year = {{2019}}, } @inproceedings{13647, author = {{Claes, Leander and Johannesmann, Sarah and Baumhögger, Elmar and Henning, Bernd}}, booktitle = {{2019 International Congress on Ultrasonics}}, location = {{Bruges}}, title = {{{Quantification of frequency-dependent absorption phenomena}}}, doi = {{10.1121/2.0001043}}, year = {{2019}}, } @inbook{30094, author = {{Ficara, Elena}}, booktitle = {{Hegel, Logic and Speculation}}, editor = {{Bubbio, Diego and De Cesaris , Alessandro and Pagano, Maurizio and Weslati, Hager}}, pages = {{15 -- 26}}, publisher = {{Bloomsbury }}, title = {{{Empowering Forms. Hegel’s conception of ‘form’ and ‘formal’}}}, year = {{2019}}, } @inbook{30091, author = {{Ficara, Elena}}, booktitle = {{Graham Priest on Paraconsistency and Dialetheism}}, editor = {{Baskent , Can and Ferguson , Thomas Macaulay}}, publisher = {{Springer }}, title = {{{ Hegel and Priest on Revising Logic}}}, year = {{2019}}, } @article{30093, author = {{Ficara, Elena}}, journal = {{Argumenta}}, title = {{{Hegel on the Naturalness of Logic}}}, year = {{2019}}, } @inproceedings{16032, author = {{Stallmeister, Tim and Chalicheemalapalli Jayasankar, Deviprasad and Wang, Z. and Tröster, Thomas}}, isbn = {{9781925627220}}, location = {{Melbourne }}, title = {{{Self-sealing tool concept for RTM-processes}}}, year = {{2019}}, } @inproceedings{16033, author = {{Stallmeister, Tim and Chalicheemalapalli Jayasankar, Deviprasad and Wang, Z. and Tröster, Thomas}}, location = {{Neu-Ulm}}, title = {{{Selbstabdichtendes Werkzeugkonzept für RTM-Prozesse}}}, year = {{2019}}, }