TY - CONF
AU - Jovanovikj, Ivan
AU - Yigitbas, Enes
AU - Sauer, Stefan
AU - Engels, Gregor
ID - 19632
T2 - Proceedings of the 8th International Working Conference on Human-Centered Software Engineering (HCSE'20)
TI - An Augmented and Virtual Reality Object Repository for Rapid Prototyping (to appear)
ER -
TY - JOUR
AU - Koldewey, Christian
AU - Meyer, Maurice
AU - Stockbrügger, Patrick
AU - Dumitrescu, Roman
AU - Gausemeier, Jürgen
ID - 18350
IS - 91
JF - Procedia CIRP
SN - 2212-8271
TI - Framework and Functionality Patterns for Smart Service Innovation
ER -
TY - CONF
AU - Sharma, Arnab
AU - Wehrheim, Heike
ID - 19656
T2 - Proceedings of the 32th IFIP International Conference on Testing Software and Systems (ICTSS)
TI - Automatic Fairness Testing of Machine Learning Models
ER -
TY - GEN
AU - Zauke, Simon
ID - 19651
TI - Stand der Forschung zu gefälschten Online-Bewertungen - Ein systematischer Literaturüberblick
ER -
TY - JOUR
AB - After the introduction of CbCR – pursuant to the BEPS Project (Action 13) in 2015 –, which was established to reduce the information asymmetry between MNEs and tax authorities of the countries they operate in, now public CbCR – as suggested by the EU Commission in 2016 – is discussed as a next step. Here, the objective is to overcome information asymmetries between MNEs and the general public of the countries they operate in. Starting from the assumption that regulators care about the legitimacy of tax laws, this article evaluates pros and cons of public CbCR. The authors find that from the perspective of information asymmetries, public CbCR increases tax transparency only marginally at best. Accordingly, it is concluded that democracies that are based on the rule of law seem to rely on pillories in terms of public CbCR to enforce fair tax payments.
AU - Sureth-Sloane, Caren
ID - 16486
IS - 2
JF - International Transfer Pricing Journal
TI - Country-by-Country Reporting Goes Public - Cui Bono?
VL - 27
ER -
TY - JOUR
AB - In recent years, the success of the Koopman operator in dynamical systems
analysis has also fueled the development of Koopman operator-based control
frameworks. In order to preserve the relatively low data requirements for an
approximation via Dynamic Mode Decomposition, a quantization approach was
recently proposed in [Peitz & Klus, Automatica 106, 2019]. This way, control
of nonlinear dynamical systems can be realized by means of switched systems
techniques, using only a finite set of autonomous Koopman operator-based
reduced models. These individual systems can be approximated very efficiently
from data. The main idea is to transform a control system into a set of
autonomous systems for which the optimal switching sequence has to be computed.
In this article, we extend these results to continuous control inputs using
relaxation. This way, we combine the advantages of the data efficiency of
approximating a finite set of autonomous systems with continuous controls. We
show that when using the Koopman generator, this relaxation --- realized by
linear interpolation between two operators --- does not introduce any error for
control affine systems. This allows us to control high-dimensional nonlinear
systems using bilinear, low-dimensional surrogate models. The efficiency of the
proposed approach is demonstrated using several examples with increasing
complexity, from the Duffing oscillator to the chaotic fluidic pinball.
AU - Peitz, Sebastian
AU - Otto, Samuel E.
AU - Rowley, Clarence W.
ID - 16309
IS - 3
JF - SIAM Journal on Applied Dynamical Systems
TI - Data-Driven Model Predictive Control using Interpolated Koopman Generators
VL - 19
ER -
TY - GEN
AU - Wende, Marc
AU - Philippi, Kai
AU - Kenig, Eugeny
ID - 19738
T2 - 10. ProcessNet-Jahrestagung und 34. DECHEMA-Jahrestagung der Biotechnologen 2020
TI - Numerische Simulation von Gravidestillationsapparaten zur Trennung eines binären Ethanol/Wasser-Gemisches
ER -
TY - CONF
AB - Konferenz aufgrund Covid 19 gecancelt.
Angegebener Monat: September 2020
AU - Büker, Petra
AU - Cornel, Stefanie
AU - Glawe, Katrin
AU - Ogrodowski, Jana
ID - 19721
TI - inklud-e: Professionalität für Inklusion im Lehramtsstudium durch digital unterstützte Fallarbeit entwickeln. Angenommener Beitrag an der DGfE-Sektionstagung Schulpädagogik an der Universität Osnabrück
ER -
TY - GEN
AU - Peckhaus, Volker
ID - 17751
T2 - Staatslexikon der Görres-Gesellschaft
TI - Technikphilosophie
ER -
TY - JOUR
AU - Schöppe, Philipp
AU - Schönherr, Sven
AU - Chugh, Manjusha
AU - Mirhosseini, Hossein
AU - Jackson, Philip
AU - Wuerz, Roland
AU - Ritzer, Maurizio
AU - Johannes, Andreas
AU - Martínez-Criado, Gema
AU - Wisniewski, Wolfgang
AU - Schwarz, Torsten
AU - T. Plass, Christian
AU - Hafermann, Martin
AU - D. Kühne, Thomas
AU - S. Schnohr, Claudia
AU - Ronning, Carsten
ID - 17376
JF - Nano Energy
SN - 2211-2855
TI - Revealing the origin of the beneficial effect of cesium in highly efficient Cu(In,Ga)Se2 solar cells
VL - 71
ER -
TY - THES
AB - Ordinary differential equations (ODEs) and partial differential equations (PDEs) arise
in most scientific disciplines that make use of mathematical techniques. As exact solutions are in general not computable, numerical methods are used to obtain approximate
solutions. In order to draw valid conclusions from numerical computations, it is crucial
to understand which qualitative aspects numerical solutions have in common with the
exact solution. Symplecticity is a subtle notion that is related to a rich family of geometric properties of Hamiltonian systems. While the effects of preserving symplecticity
under discretisation on long-term behaviour of motions is classically well known, in this
thesis
(a) the role of symplecticity for the bifurcation behaviour of solutions to Hamiltonian
boundary value problems is explained. In parameter dependent systems at a bifurcation
point the solution set to a boundary value problem changes qualitatively. Bifurcation
problems are systematically translated into the framework of classical catastrophe theory. It is proved that existing classification results in catastrophe theory apply to
persistent bifurcations of Hamiltonian boundary value problems. Further results for
symmetric settings are derived.
(b) It is proved that to preserve generic bifurcations under discretisation it is necessary and sufficient to preserve the symplectic structure of the problem.
(c) The catastrophe theory framework for Hamiltonian ODEs is extended to PDEs
with variational structure. Recognition equations for A-series singularities for functionals on Banach spaces are derived and used in a numerical example to locate high-codimensional bifurcations.
(d) The potential of symplectic integration for infinite-dimensional Lie-Poisson systems (Burgers’ equation, KdV, fluid equations, . . . ) using Clebsch variables is analysed.
It is shown that the advantages of symplectic integration can outweigh the disadvantages of integrating over a larger phase space introduced by a Clebsch representation.
(e) Finally, the preservation of variational structure of symmetric solutions in multisymplectic PDEs by multisymplectic integrators on the example of (phase-rotating)
travelling waves in the nonlinear wave equation is discussed.
AU - Offen, Christian
ID - 19947
TI - Analysis of Hamiltonian boundary value problems and symplectic integration
ER -
TY - JOUR
AB - As a result of lightweight design, increased use is being made of high-strength steel and aluminium in car bodies. Self-piercing riveting is an established technique for joining these materials. The dissimilar properties of the two materials have led to a number of different rivet geometries in the past. Each rivet geometry fulfils the requirements of the materials within a limited range. In the present investigation, an improved rivet geometry is developed, which permits the reliable joining of two material combinations that could only be joined by two different rivet geometries up until now. Material combination 1 consists of high-strength steel on both sides, while material combination 2 comprises aluminium on the punch side and high-strength steel on the die side. The material flow and the stress and strain conditions prevailing during the joining process are analysed by means of numerical simulation. The rivet geometry is then improved step-by-step on the basis of this analysis. Finally, the improved rivet geometry is manufactured and the findings of the investigation are verified in experimental joining tests.
AU - Uhe, Benedikt
AU - Kuball, Clara-Maria
AU - Merklein, Marion
AU - Meschut, Gerson
ID - 19973
JF - Production Engineering
KW - Self-piercing riveting
KW - Joining technology
KW - Rivet geometry
KW - Multi-material design
KW - High-strength steel
KW - Aluminium
TI - Improvement of a rivet geometry for the self-piercing riveting of high-strength steel and multi-material joints
VL - 14
ER -
TY - GEN
AU - Terfort, Tobias
ID - 18639
TI - Enhancing Security by Usage of Universal One-Way Hash Functions
ER -
TY - CONF
AU - Wachsmuth, Henning
AU - Werner, Till
ID - 20115
T2 - Proceedings of the 28th International Conference on Computational Linguistics
TI - Intrinsic Quality Assessment of Arguments
ER -
TY - CONF
AU - El Baff, Roxanne
AU - Al-Khatib, Khalid
AU - Stein, Benno
AU - Wachsmuth, Henning
ID - 20122
T2 - Third Workshop on Computational Modeling of People's Opinions, Personality, and Emotions in Social Media (PEOPLES 2020)
TI - Persuasiveness of News Editorials depending on Ideology and Personality
ER -
TY - CONF
AU - Chen, Wei-Fan
AU - Al-Khatib, Khalid
AU - Wachsmuth, Henning
AU - Stein, Benno
ID - 3776
T2 - Fourth edition of the Natural Language Processing and Computational Social Science workshop (NLP+CSS 2020)
TI - Analyzing Political Bias and Unfairness in News Articles at Different Levels of Granularity
ER -
TY - CONF
AU - Heindorf, Stefan
AU - Scholten, Yan
AU - Wachsmuth, Henning
AU - Ngonga Ngomo, Axel-Cyrille
AU - Potthast, Martin
ID - 20141
T2 - Proceedings of the 28th ACM International Conference on Information and Knowledge Management (CIKM 2020)
TI - CauseNet: Towards a Causality Graph Extracted from the Web
ER -
TY - CONF
AU - Spliethöver, Maximilian
AU - Wachsmuth, Henning
ID - 20139
T2 - Proceedings of the 7th Workshop on Argument Mining (ArgMining 2020)
TI - Argument from Old Man's View: Assessing Social Bias in Argumentation
ER -
TY - CONF
AB - Joining technology is regarded as a key technology for reducing energy consumption and CO2 imitation as well as the use of innovative materials and development of new, resource-saving products. Punch riveting is a widely used and established joining process in many sectors. The white and brown goods, electrical engineering, construction and, in particular, the automotive industry are some of the sectors mentioned here.
Since the design and assessment of punch rivet components with regard to structural durability can only be carried out experimentally using prototypes due to a lack of experience and calculation concepts, the improvement of this uneconomical and time-consuming procedure is the goal of this contribution.
Therefore, a numerical simulation and design method for cyclically loads punched riveted joints shall be introduced. This concept shall be based on the notch strain concept.
The following steps are necessary to achieve the goal shown above:
Tensile tests on all materials involved in the joint for determination of tensile strength and quasi-static stress-strain curves
Estimation of the cyclic material properties from the tensile strength in order to obtain the strain-life curve and the cyclic stress-strain curve
Estimation of mean stress sensitivity from the tensile strength to conduct an amplitude transformation for variable amplitude loadings.
Execution of a 2D forming simulation of the joining process to determine the geometry and the stresses and degrees of deformation present in the connection
Transferring the results of the forming simulation into a static-mechanical load simulation for determining the relation between the external load and the elastic-plastic strain at the critical point
Estimation of the service life by means of the damage parameter Wöhler curves calculated from the strain-life curve
In order to verify the simulation and calculation method, service life investigations have been carried out on punched riveted components under constant and variable amplitude load.
The test results, as well as the workflow through the fatigue assessment and its accuracy in estimation the fatigue life will be shown in this contribution.
AU - Masendorf, Lukas
AU - Wächter, Michael
AU - Horstmann, Stephan
AU - Otroshi, Mortaza
AU - Esderts, Alfons
AU - Meschut, Gerson
ID - 20146
KW - punch rivet
KW - notch strain conept
KW - structural durability
SN - 978-3-9820591-0-5
TI - Linear damage accumulation of self-pierce riveted joints
ER -
TY - CONF
AU - Castenow, Jannik
AU - Kling, Peter
AU - Knollmann, Till
AU - Meyer auf der Heide, Friedhelm
ID - 17371
SN - 9781450369350
T2 - Proceedings of the 32nd ACM Symposium on Parallelism in Algorithms and Architectures
TI - Brief Announcement: A Discrete and Continuous Study of the Max-Chain-Formation Problem: Slow Down to Speed up
ER -
TY - JOUR
AB - Abstract
A dielectric step-index optical fiber with tube-like profile is considered, being positioned with a small gap on top of a dielectric slab waveguide. We propose a 2.5-D hybrid analytical/numerical coupled mode model for the evanescent excitation of the tube through semi-guided waves propagating in the slab at oblique angles. The model combines the directional polarized modes supported by the slab with analytic solutions for the TE-, TM-, and orbital-angular-momentum (OAM) modes of the tube-shaped fiber. Implementational details of the scheme are discussed, complemented by finite-element simulations for verification purposes. Our results include configurations with resonant in-fiber excitation of OAM modes with large orbital angular momentum and strong field enhancement.
AU - Hammer, Manfred
AU - Ebers, Lena
AU - Förstner, Jens
ID - 20189
JF - Optical and Quantum Electronics
KW - tet_topic_waveguides
SN - 0306-8919
TI - Hybrid coupled mode modelling of the evanescent excitation of a dielectric tube by semi-guided waves at oblique angles
VL - 52
ER -
TY - GEN
AU - Hemsen, Paul
AU - Hesse, Marc
AU - Löken, Nils
AU - Nouri, Zahra
ID - 20191
TI - Platform-independent Reputation and Qualification System for Crowdwork
ER -
TY - GEN
AB - In many real-world applications, the relative depth of objects in an image is
crucial for scene understanding, e.g., to calculate occlusions in augmented
reality scenes. Predicting depth in monocular images has recently been tackled
using machine learning methods, mainly by treating the problem as a regression
task. Yet, being interested in an order relation in the first place,
ranking methods suggest themselves as a natural alternative to regression, and
indeed, ranking approaches leveraging pairwise comparisons as training
information ("object A is closer to the camera than B") have shown promising
performance on this problem. In this paper, we elaborate on the use of
so-called \emph{listwise} ranking as a generalization of the pairwise approach.
Listwise ranking goes beyond pairwise comparisons between objects and considers
rankings of arbitrary length as training information. Our approach is based on
the Plackett-Luce model, a probability distribution on rankings, which we
combine with a state-of-the-art neural network architecture and a sampling
strategy to reduce training complexity. An empirical evaluation on benchmark
data in a "zero-shot" setting demonstrates the effectiveness of our proposal
compared to existing ranking and regression methods.
AU - Lienen, Julian
AU - Hüllermeier, Eyke
ID - 20211
T2 - arXiv:2010.13118
TI - Monocular Depth Estimation via Listwise Ranking using the Plackett-Luce model
ER -
TY - CONF
AU - Szopinski, Daniel
AU - Schoormann, Thorsten
AU - Kundisch, Dennis
ID - 13584
T2 - Proceedings of the 53rd Hawaii International Conference on System Sciences (HICSS)
TI - Criteria as a prelude for guiding taxonomy evaluation
ER -
TY - JOUR
AU - Liêu, Minh Ly
AU - Pelster, Matthias
ID - 15744
JF - The Quarterly Review of Economics and Finance
SN - 1062-9769
TI - Framing and the disposition effect in a scopic regime
ER -
TY - CONF
AU - Chen, Wei-Fan
AU - Syed, Shahbaz
AU - Stein, Benno
AU - Hagen, Matthias
AU - Potthast, Martin
ID - 15826
T2 - Proceedings of the the Web Conference 2020
TI - Abstractive Snippet Generation
ER -
TY - GEN
AU - Poniatowski, Martin
AU - Neumann, Jürgen
ID - 15225
T2 - Tagungsband der 15. Internationalen Tagung Wirtschaftsinformatik 2020 (WI)
TI - You Write What You Are - Exploring the Relationship between Online Reviewers' Personality Traits and Their Reviewing Behavior
ER -
TY - CONF
AB - In multi-label classification (MLC), each instance is associated with a set of class labels, in contrast to standard classification where an instance is assigned a single label. Binary relevance (BR) learning, which reduces a multi-label to a set of binary classification problems, one per label, is arguably the most straight-forward approach to MLC. In spite of its simplicity, BR proved to be competitive to more sophisticated MLC methods, and still achieves state-of-the-art performance for many loss functions. Somewhat surprisingly, the optimal choice of the base learner for tackling the binary classification problems has received very little attention so far. Taking advantage of the label independence assumption inherent to BR, we propose a label-wise base learner selection method optimizing label-wise macro averaged performance measures. In an extensive experimental evaluation, we find that or approach, called LiBRe, can significantly improve generalization performance.
AU - Wever, Marcel Dominik
AU - Tornede, Alexander
AU - Mohr, Felix
AU - Hüllermeier, Eyke
ID - 15629
TI - LiBRe: Label-Wise Selection of Base Learners in Binary Relevance for Multi-Label Classification
ER -
TY - JOUR
AU - Claes, Leander
AU - Steidl, Carolin
AU - Hetkämper, Tim
AU - Henning, Bernd
ID - 15489
JF - arXiv.org
TI - Estimation of acoustic wave non-linearity in ultrasonic measurement systems
ER -
TY - JOUR
AB - This study examines the gender gap in competitiveness in an educational setting
and tests whether this gap depends on the difficulty of the task at hand. For this purpose,
we administered a series of experiments during the final exam of a university
course. We confronted three cohorts of undergraduate students with a set of bonus
questions and the choice between an absolute and a tournament grading scheme
for these questions. To test the moderating impact of task difficulty, we (randomly)
varied the difficulty of the questions between treatment groups. We find that, on
average, women are significantly less likely to select the tournament scheme. However,
the results show that the gender gap in tournament entry is sizable when the
questions are relative easy, but much smaller and statistical insignificant when the
questions are difficult.
AU - Hoyer, Britta
AU - van Huizen, Thomas
AU - Keijzer, Linda
AU - Rezaei, Sarah
AU - Rosenkranz, Stephanie
AU - Westbrock, Bastian
ID - 16273
JF - Labour Economics
TI - Gender, competitiveness, and task difficulty: Evidence from the field
ER -
TY - JOUR
AB - Currently, the coexistence of multiple users and devices challenges the network's ability to reliably connect them. This article proposes a novel communication architecture that satisfies the requirements of fifth-generation (5G) mobile network applications. In particular, this architecture extends and combines ultra-dense networking (UDN), multi-access edge computing (MEC), and virtual infrastructure manager (VIM) concepts to provide a flexible network of moving radio access (RA) nodes, flying or moving to areas where users and devices struggle for connectivity and data rate. Furthermore, advances in radio communications and non-orthogonal multiple access (NOMA), virtualization technologies and energy-awareness mechanisms are integrated towards a mobile UDN that not only allows RA nodes to follow the user but also enables the virtualized network functions (VNFs) to adapt to user mobility by migrating from one node to another. Performance evaluation shows that the underlying network improves connectivity of users and devices through the flexible deployment of moving RA nodes and the use of NOMA.
AU - Nomikos, Nikolaos
AU - Michailidis, Emmanouel T.
AU - Trakadas, Panagiotis
AU - Vouyioukas, Demosthenes
AU - Karl, Holger
AU - Martrat, Josep
AU - Zahariadis, Theodore
AU - Papadopoulos, Konstantinos
AU - Voliotis, Stamatis
ID - 16278
JF - Vehicular Communications
SN - 2214-2096
TI - A UAV-based moving 5G RAN for massive connectivity of mobile users and IoT devices
ER -
TY - JOUR
AB - Assigning bands of the wireless spectrum as resources to users is a common problem in wireless networks. Typically, frequency bands were assumed to be available in a stable manner. Nevertheless, in recent scenarios where wireless networks may be deployed in unknown environments, spectrum competition is considered, making it uncertain whether a frequency band is available at all or at what quality. To fully exploit such resources with uncertain availability, the multi-armed bandit (MAB) method, a representative online learning technique, has been applied to design spectrum scheduling algorithms. This article surveys such proposals. We describe the following three aspects: how to model spectrum scheduling problems within the MAB framework, what the main thread is following which prevalent algorithms are designed, and how to evaluate algorithm performance and complexity. We also give some promising directions for future research in related fields.
AU - Li, Feng
AU - Yu, Dongxiao
AU - Yang, Huan
AU - Yu, Jiguo
AU - Karl, Holger
AU - Cheng, Xiuzhen
ID - 16280
JF - IEEE Wireless Communications
SN - 1536-1284
TI - Multi-Armed-Bandit-Based Spectrum Scheduling Algorithms in Wireless Networks: A Survey
ER -
TY - CONF
AB - To decide in which part of town to open stores, high street retailers consult statistical data on customers and cities, but they cannot analyze their customers’ shopping behavior and geospatial features of a city due to missing data. While previous research has proposed recommendation systems and decision aids that address this type of decision problem – including factory location and assortment planning – there currently is no design knowledge available to prescribe the design of city center area recommendation systems (CCARS). We set out to design a software prototype considering local customers’ shopping interests and geospatial data on their shopping trips for retail site selection. With real data on 500 customers and 1,100 shopping trips, we demonstrate and evaluate our IT artifact. Our results illustrate how retailers and public town center managers can use CCARS for spatial location selection, growing retailers’ profits and a city center’s attractiveness for its citizens.
AU - zur Heiden, Philipp
AU - Berendes, Carsten Ingo
AU - Beverungen, Daniel
ID - 16285
KW - Town Center Management
KW - High Street Retail
KW - Recommender Systems
KW - Geospatial Recommendations
KW - Design Science Research
T2 - Proceedings of the 15th International Conference on Wirtschaftsinformatik
TI - Designing City Center Area Recommendation Systems
ER -
TY - CONF
AU - Wolf, Verena
AU - Bartelheimer, Christian
ID - 16300
T2 - 16th International Research Conference in Service Management
TI - Transformation of Actors’ Roles in Service Systems: A Multi-Level Analysis (Accepted)
ER -
TY - JOUR
AU - Goller, Michael
AU - Harteis, Christian
AU - Gijbels, David
AU - Donche, Vincent
ID - 16507
IS - 2
JF - Journal of Engineering Education
SN - 1069-4730
TI - Engineering students' learning during internships: Exploring the explanatory power of the job demands‐control‐support model
VL - 109
ER -
TY - GEN
AU - Gutperl, Sven
AU - Bolenz, Lukas
AU - Kriese, Friederike
AU - Jasch, Katharina
AU - Kenig, Eugeny
AU - Scholl, Stephan
ID - 16204
TI - Simulation und Bewertung eines Anlagenkonzepts für Trennleistungsmessungen mit nicht-verdampfenden Komponenten
ER -
TY - GEN
AU - Rosenhäger, Tjard Henrik
ID - 16571
TI - Nothing comes for free - Ein klassifizierender Überblick zu den Auswirkungen finanzieller Anreize auf digitalen Märkten
ER -
TY - JOUR
AU - Krimphove, Dieter
ID - 16095
IS - 1
JF - Rechtstheorie
SN - 0034-1398
TI - Die „Logik“ der Überzeugungskraft
VL - 50
ER -
TY - JOUR
AU - Javed, Muhammad Ali
AU - Rüther, Moritz
AU - Baumhögger, Elmar
AU - Vrabec, Jadran
ID - 16848
JF - Journal of Chemical & Engineering Data
SN - 0021-9568
TI - Density and Thermodynamic Speed of Sound of Liquid Vinyl Chloride
ER -
TY - CONF
AU - Krauter, Stefan
AU - Zhang, L.
ID - 16855
T2 - Tagungsband des 35. Symposiums für Photovoltaische Solarenergie, Kloster Banz, Bad Staffelstein (Deutschland)
TI - Eignung der Netzfrequenz als Instrument der Entscheidungsfindung zur Auslösung von Lastverschiebungen bei niedrigen spezifischen CO 2 -Emsissionen und EEX- Handelspreisen
ER -
TY - GEN
AB - In this article, we present an efficient descent method for locally Lipschitz
continuous multiobjective optimization problems (MOPs). The method is realized
by combining a theoretical result regarding the computation of descent
directions for nonsmooth MOPs with a practical method to approximate the
subdifferentials of the objective functions. We show convergence to points
which satisfy a necessary condition for Pareto optimality. Using a set of test
problems, we compare our method to the multiobjective proximal bundle method by
M\"akel\"a. The results indicate that our method is competitive while being
easier to implement. While the number of objective function evaluations is
larger, the overall number of subgradient evaluations is lower. Finally, we
show that our method can be combined with a subdivision algorithm to compute
entire Pareto sets of nonsmooth MOPs.
AU - Gebken, Bennet
AU - Peitz, Sebastian
ID - 16867
T2 - arXiv:2004.11578
TI - An efficient descent method for locally Lipschitz multiobjective optimization problems
ER -
TY - JOUR
AU - Gilroy, Bernard Michael
AU - Peitz, Christian
ID - 16879
IS - 1
JF - WISU – Das Wirtschaftsstudium
TI - Die Niedrigzinspolitik der Europäischen Zentralbank
ER -
TY - GEN
AB - Electronic structure calculations based on density-functional theory (DFT)
represent a significant part of today's HPC workloads and pose high demands on
high-performance computing resources. To perform these quantum-mechanical DFT
calculations on complex large-scale systems, so-called linear scaling methods
instead of conventional cubic scaling methods are required. In this work, we
take up the idea of the submatrix method and apply it to the DFT computations
in the software package CP2K. For that purpose, we transform the underlying
numeric operations on distributed, large, sparse matrices into computations on
local, much smaller and nearly dense matrices. This allows us to exploit the
full floating-point performance of modern CPUs and to make use of dedicated
accelerator hardware, where performance has been limited by memory bandwidth
before. We demonstrate both functionality and performance of our implementation
and show how it can be accelerated with GPUs and FPGAs.
AU - Lass, Michael
AU - Schade, Robert
AU - Kühne, Thomas
AU - Plessl, Christian
ID - 16898
TI - A Submatrix-Based Method for Approximate Matrix Function Evaluation in the Quantum Chemistry Code CP2K
ER -
TY - GEN
AB - Let $\phi_c(G)$ be the circular flow number of a bridgeless graph $G$. In [Edge-colorings and circular flow numbers of regular graphs, J. Graph Theory 79 (2015) 1-7] it was proved that, for every $t \geq 1$, $G$ is a bridgeless $(2t+1)$-regular graph with $\phi_c(G) \in \{2+\frac{1}{t}, 2 + \frac{2}{2t-1}\}$ if and only if $G$ has a perfect matching $M$ such that $G-M$ is bipartite. This implies that $G$ is a class 1 graph. For $t=1$, all graphs with circular flow number bigger than 4 are class 2 graphs. We show for all $t \geq 1$, that $2 + \frac{2}{2t-1} = \inf \{ \phi_c(G)\colon G \text{ is a } (2t+1) \text{-regular class } 2 \text{ graph}\}$. This was conjectured to be true in [Edge-colorings and circular flow numbers of regular graphs, J. Graph Theory 79 (2015) 1-7]. Moreover we prove that $\inf\{ \phi_c(G)\colon G $ is a $ (2t+1)$-regular class $1$ graph with no perfect matching whose removal leaves a bipartite graph$ \} = 2 + \frac{2}{2t-1}$. We further disprove the conjecture that every $(2t+1)$-regular class $1$ graph has circular flow number at most $2+\frac{2}{t}$.
AU - Mattiolo, Davide
AU - Steffen, Eckhard
ID - 16747
T2 - arXiv:2001.02484
TI - Edge colorings and circular flows on regular graphs
ER -
TY - CONF
AU - Bartelheimer, Christian
AU - Wolf, Verena
AU - Langhorst, Nico
AU - Seegers, Florian
ID - 16800
T2 - Proceedings of the 15th International Conference on Design Science Research in Information Systems and Technology
TI - Designing Digital Community Service Platforms for Crowd-Based Services in Urban Areas
ER -
TY - CONF
AU - El Baff, Roxanne
AU - Wachsmuth, Henning
AU - Al-Khatib, Khalid
AU - Stein, Benno
ED - Tsujii, Junichi
ED - Hajic, Jan
ID - 3878
T2 - Proceedings of 58th Annual Meeting of the Association for Computational Linguistics
TI - Analyzing the Persuasive Effect of Style in News Editorial Argumentation
ER -
TY - JOUR
AU - Chatwell, René Spencer
AU - Vrabec, Jadran
ID - 16956
JF - The Journal of Chemical Physics
KW - pc2-ressources
SN - 0021-9606
TI - Bulk viscosity of liquid noble gases
ER -
TY - CHAP
AU - Kuklinski, Christiane
AU - Leis, Elena
AU - Liebendörfer, Michael
AU - Hochmuth, Reinhard
ED - Frank, Andreas
ED - Krauss, Stefan
ED - Binder, Karin
ID - 16963
T2 - Beiträge zum {Mathematikunterricht} 2019 53. {Jahrestagung} der {Gesellschaft} für {Didaktik} der {Mathematik}.
TI - Erklärung von Mathematikleistung im Ingenieursstudium
ER -
TY - CONF
AB - Understanding a new literature corpus can be a grueling experience for junior scholars. Nevertheless, corresponding guidelines have not been updated for decades. We contend that the traditional strategy of skimming all papers and reading selected papers afterwards needs to be revised. Therefore, we design a new strategy that guides the overall exploratory process by prioritizing influential papers for initial reading, followed by skimming the remaining papers. Consistent with schemata theory, starting with in-depth reading allows readers to acquire more substantial prior content schemata, which are representa-tive for the literature corpus and useful in the following skimming process. To this end, we develop a prototype that identifies the influential papers from a set of PDFs, which is illustrated in a case study in the IT business value domain. With the new strategy, we envision a more efficient process of exploring unknown literature corpora.
AU - Wagner, Gerit
AU - Empl, Philipp
AU - Schryen, Guido
ID - 17055
KW - Reading and skimming
KW - Exploring literature
KW - Review methodology
KW - Design science research
KW - Schemata theory
T2 - 28th European Conference on Information Systems (ECIS 2020)
TI - Designing a Novel Strategy for Exploring Literature Corpora
ER -
TY - JOUR
AU - Speiser, Eugen
AU - Esser, Norbert
AU - Halbig, Benedikt
AU - Geurts, Jean
AU - Schmidt, Wolf Gero
AU - Sanna, Simone
ID - 17067
IS - 1
JF - Surface Science Reports
SN - 0167-5729
TI - Vibrational Raman spectroscopy on adsorbate-induced low-dimensional surface structures
VL - 75
ER -