TY - JOUR
AB - Data-driven models for nonlinear dynamical systems based on approximating the underlying Koopman operator or generator have proven to be successful tools for forecasting, feature learning, state estimation, and control. It has become well known that the Koopman generators for control-affine systems also have affine dependence on the input, leading to convenient finite-dimensional bilinear approximations of the dynamics. Yet there are still two main obstacles that limit the scope of current approaches for approximating the Koopman generators of systems with actuation. First, the performance of existing methods depends heavily on the choice of basis functions over which the Koopman generator is to be approximated; and there is currently no universal way to choose them for systems that are not measure preserving. Secondly, if we do not observe the full state, we may not gain access to a sufficiently rich collection of such functions to describe the dynamics. This is because the commonly used method of forming time-delayed observables fails when there is actuation. To remedy these issues, we write the dynamics of observables governed by the Koopman generator as a bilinear hidden Markov model, and determine the model parameters using the expectation-maximization (EM) algorithm. The E-step involves a standard Kalman filter and smoother, while the M-step resembles control-affine dynamic mode decomposition for the generator. We demonstrate the performance of this method on three examples, including recovery of a finite-dimensional Koopman-invariant subspace for an actuated system with a slow manifold; estimation of Koopman eigenfunctions for the unforced Duffing equation; and model-predictive control of a fluidic pinball system based only on noisy observations of lift and drag.
AU - Otto, Samuel E.
AU - Peitz, Sebastian
AU - Rowley, Clarence W.
ID - 33461
IS - 1
JF - SIAM Journal on Applied Dynamical Systems
TI - Learning Bilinear Models of Actuated Koopman Generators from Partially-Observed Trajectories
VL - 23
ER -
TY - THES
AB - Ultraschallsysteme für das Herstellen für Bond- und Schweißverbindungen in der Halbleiterfertigung zeigen auf Grund des Betriebes unter hohen Anregungsniveaus nichtlineare Materialeigenschaften. Dabei wirken unterschiedliche Einflussfaktoren auf die elektrischen Eigenschaften und die mechanischen Übertragungscharakteristiken der Ultraschallsysteme ein. Die Herausforderungen ein solches geprägtes System auszulegen oder effizient und zuverlässig zu betreiben, sind aufgrund der Nichtlinearitäten relativ groß.
Da für die Beschreibung der nichtlinearen Materialbeziehungen nur wenige Modelle und kaum quantitative Angaben vorliegen, werden die komplexen Wechselwirkungen von Materialparametern, Geometrie und Vorspannung des Schwingers, Betriebsgrößen (Strom, Spannung), Temperatur und Prozesslasten durch systematische Untersuchungen von Keramiken und Langevin-Schwingern messtechnisch erfasst. Aus den Messergebnissen werden einerseits eindimensionale Modelle für Voruntersuchungen als auch vollständige Materialparametersätze für die Simulation mittels dreidimensionaler FE-Modelle hergeleitet.
Eine Methodik zur Ermittlung der Materialparameter und ein auf iterativen Simulationen von FE-Modellen basierendes Werkzeug zur Simulation der komplexen Wechselwirkungen werden vorgestellt. Anhand eines exemplarischen Ultraschallsystems wird gezeigt, dass die Wirkungen temperaturbedingter Vorspannungsverluste, Änderungen des elektrischen Klemmenverhaltens und Amplituden- und Frequenzänderungen während des Betriebes bei großen Amplituden und Prozesslasten durch die Variationen des Keramikvolumens und der Keramikposition positiv beeinflusst werden können.
AU - Dymel, Collin
ID - 52611
KW - Nichtlineares piezoelektrisches Verhalten
KW - Dehnungsabhängigkeit
KW - Vorspannungseinfluss
KW - Temperatureinfluss
KW - Lasteinfluss
KW - Langevin-Schwinger
KW - Ultraschallwandler
KW - Ultraschallbonden
KW - FEM-Modell
KW - Ultraschallschweißen
KW - BVD-Modell
SN - 9783844093964
TI - Modellbasierte Entwicklung von Ultraschallwandlern unter der Berücksichtigung von Nichtlinearitäten
VL - 16
ER -
TY - JOUR
AB - Resistance spot‐welded joints containing press‐hardened steels are seen to exhibit a fracture mode called total dome failure, where the weld nugget completely separates from one steel sheet along the weld nugget edge. The effect of weld nugget shape and material property gradients is studied based on damage mechanics modeling and experimental validation to shed light on the underlying influencing factors. For a three‐steel‐sheet spot‐welded joint combining DP600 (1.5 mm)–CR1900T (1.0 mm)–CR1900T (1.0 mm), experiments under shear loading reveal that fracture occurs in the DP600 sheet along the weld nugget edge. In subsequent numerical simulation studies with damage mechanics models whose parameters are independently calibrated for every involved material configuration, three variations of the geometrical joint configuration are considered—an approximation of the real joint, one variation with a steeper weld nugget shape, and one variation with a less pronounced gradient between weld nugget material and heat‐affected zone material properties. The results of the finite‐element simulations show that a shallower weld nugget and a more pronounced material gradient lead to a faster increase of plastic strain at the edge of the weld nugget and promote the occurrence of total dome failure.
AU - Schuster, Lilia
AU - Olfert, Viktoria
AU - Sherepenko, Oleksii
AU - Fehrenbach, Clemens
AU - Song, Shiyuan
AU - Hein, David
AU - Meschut, Gerson
AU - Biro, Elliot
AU - Münstermann, Sebastian
ID - 50726
JF - steel research international
KW - Materials Chemistry
KW - Metals and Alloys
KW - Physical and Theoretical Chemistry
KW - Condensed Matter Physics
SN - 1611-3683
TI - Influences of Weld Nugget Shape and Material Gradient on the Shear Strength of Resistance Spot‐Welded Joints
ER -
TY - THES
AU - Hassel, Richard
ID - 52501
TI - Zur Abscheidung von Tröpfchen-Aerosolen in filternden Abscheidern
ER -
TY - JOUR
AB - AbstractFootball is one of the most played sports in the world and kicking with adequate accuracy increases the likelihood of winning a competition. Although studies with different target-directed movements underline the role of distinctive cortical activity on superior accuracy, little is known about cortical dynamics associated with kicking. Mobile electroencephalography is a popular tool to investigate cortical modulations during movement, however, inherent and artefact-related pitfalls may obscure the reliability of functional sources and their activity. The purpose of this study was therefore to describe consistent cortical dynamics underlying target-directed pass-kicks based on test–retest reliability estimates. Eleven participants performed a target-directed kicking task at two different sessions within one week. Electroencephalography was recorded using a 65-channel mobile system and behavioural data were collected including motion range, acceleration and accuracy performance. Functional sources were identified using independent component analysis and clustered in two steps with the components of first and subsequently both sessions. Reliability estimates of event-related spectral perturbations were computed pixel-wise for participants contributing with components of both sessions. The parieto-occipital and frontal clusters were reproducible for the same majority of the sample at both sessions. Their activity showed consistent alpha desyhronization and theta sychnronisation patterns with substantial reliability estimates revealing visual and attentional demands in different phases of kicking. The findings of our study reveal prominent cortical demands during the execution of a target-directed kick which may be considered in practical implementations and provide promising academic prospects in the comprehension and investigation of cortical activity associated with target-directed movements.
AU - Piskin, Daghan Yuksel
AU - Büchel, Daniel
AU - Lehmann, Tim
AU - Baumeister, Jochen
ID - 52631
JF - Cognitive Neurodynamics
KW - Cognitive Neuroscience
SN - 1871-4080
TI - Reliable electrocortical dynamics of target-directed pass-kicks
ER -
TY - GEN
AU - Zink, Timm Florian
ID - 52639
TI - Untersuchung des Lösungsmitellseinflusses auf die Synthese von Manganoxid-Nanopartikeln in der Flammenspraypyrolyse
ER -
TY - JOUR
AB - ELDIRK methods are defined to have an Explicit Last stage in the general Butcher array of Diagonal Implicit Runge-Kutta methods, with the consequence, that no additional system of equations must be solved, compared to the embedded RK method. Two general formulations for second- and third-order ELDIRK methods have been obtained recently in Mahnken [21] with specific schemes, e.g. for the embedded implicit Euler method, the embedded trapezoidal-rule and the embedded Ellsiepen method. In the first part of this paper, we investigate some general stability characteristics of ELDIRK methods, and it will be shown that the above specific RK schemes are not A-stable. Therefore, in the second part, the above-mentioned general formulations are used for further stability investigations, with the aim to construct new second- and third-order ELDIRK methods which simultaneously are A-stable. Two numerical examples are concerned with the curing for a thermosetting material and phase-field RVE modeling for crystallinity and orientation. The numerical results confirm the theoretical results on convergence order and stability.
AU - Mahnken, Rolf
AU - Westermann, Hendrik
ID - 52233
JF - Computational Mechanics
KW - Applied Mathematics
KW - Computational Mathematics
KW - Computational Theory and Mathematics
KW - Mechanical Engineering
KW - Ocean Engineering
KW - Computational Mechanics
SN - 0178-7675
TI - Construction of A-stable explicit last-stage diagonal implicit Runge–Kutta (ELDIRK) methods
ER -
TY - CHAP
AU - Domke, Marius
AU - Fröhlich, Nadine
AU - Eickelmann, Birgit
AU - Pink, Sara
ED - Herzig, B.
ED - Eickelmann, Birgit
ED - Schwabl, F.
ED - Schulze, J.
ED - Niemann, Jan
ID - 51128
T2 - Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven
TI - Digitalisierungsbezogene Lehrkräftebildung als Gegenstand internationaler Schulleistungsstudien
ER -
TY - JOUR
AU - Herdramm, Henrike
ID - 52652
JF - BloKK. Der Blog des Zentrums für Komparative Theologie und Kulturwissenschaften
KW - Ideologiekritik
KW - Tiertheologie
KW - Tierethik
TI - Das Potenzial von Ideologiekritik im Religionsunterricht
ER -
TY - GEN
AB - Context
Static analyses are well-established to aid in understanding bugs or vulnerabilities during the development process or in large-scale studies. A low false-positive rate is essential for the adaption in practice and for precise results of empirical studies. Unfortunately, static analyses tend to report where a vulnerability manifests rather than the fix location. This can cause presumed false positives or imprecise results.
Method
To address this problem, we designed an adaption of an existing static analysis algorithm that can distinguish between a manifestation and fix location, and reports error chains. An error chain represents at least two interconnected errors that occur successively, thus building the connection between the fix and manifestation location. We used our tool CogniCryptSUBS for a case study on 471 GitHub repositories, a performance benchmark to compare different analysis configurations, and conducted an expert interview.
Result
We found that 50 % of the projects with a report had at least one error chain. Our runtime benchmark demonstrated that our improvement caused only a minimal runtime overhead of less than 4 %. The results of our expert interview indicate that with our adapted version participants require fewer executions of the analysis.
Conclusion
Our results indicate that error chains occur frequently in real-world projects, and ignoring them can lead to imprecise evaluation results. The runtime benchmark indicates that our tool is a feasible and efficient solution for detecting error chains in real-world projects. Further, our results gave a hint that the usability of static analyses may benefit from supporting error chains.
AU - Wickert, Anna-Katharina
AU - Schlichtig, Michael
AU - Vogel, Marvin
AU - Winter, Lukas
AU - Mezini, Mira
AU - Bodden, Eric
ID - 52663
KW - Static analysis
KW - error chains
KW - false positive re- duction
KW - empirical studies
TI - Supporting Error Chains in Static Analysis for Precise Evaluation Results and Enhanced Usability
ER -
TY - CHAP
AU - Labusch, Amelie
AU - Eickelmann, Birgit
AU - Casamassima, Gianna
AU - Drossel, Kerstin
AU - Gudmundsdottir, G.B.
AU - Kazani, A.
AU - Mifsud, L.
AU - Symeonaki, M.
AU - Teidla-Kunitsõn, G.
ED - Holmarsdottir, H.B.
ED - Seland, I.
ED - Hyggen, C.
ED - Roth, M.
ID - 51098
T2 - Understanding the everyday digital lives of children and young people
TI - Children and young people’s ICT experiences in school education: Participatory research design to engage children and young people as experts in research
ER -
TY - CHAP
AU - Drossel, Kerstin
AU - Oldak, Anna
AU - Bette, Ricarda
AU - Eickelmann, Birgit
AU - Schreyer, P.
ED - Herzig, B.
ED - Eickelmann, Birgit
ED - Schwabl, F.
ED - Schulze, J.
ED - Niemann, Jan
ID - 51096
T2 - Lehrkräftebildung in der digitalen Welt – zukunftsorientierte Forschungs- und Praxisperspektiven
TI - Videoanalysen zu unterrichtlichen Lehr- und Lernprozessen unter den Bedingungen der Digitalität an organisational resilienten Schulen in Deutschland
ER -
TY - GEN
AB - We prove Feynman-Kac formulas for the semigroups generated by selfadjoint
operators in a class containing Fr\"ohlich Hamiltonians known from solid state
physics. The latter model multi-polarons, i.e., a fixed number of quantum
mechanical electrons moving in a polarizable crystal and interacting with the
quantized phonon field generated by the crystal's vibrational modes. Both the
electrons and phonons can be confined to suitable open subsets of Euclidean
space. We also include possibly very singular magnetic vector potentials and
electrostatic potentials. Our Feynman-Kac formulas comprise Fock space
operator-valued multiplicative functionals and can be applied to every vector
in the underlying Hilbert space. In comparison to the renormalized Nelson
model, for which analogous Feynman-Kac formulas are known, the analysis of the
creation and annihilation terms in the multiplicative functionals requires
novel ideas to overcome difficulties caused by the phonon dispersion relation
being constant. Getting these terms under control and generalizing other
construction steps so as to cover confined systems are the main achievements of
this article.
AU - Hinrichs, Benjamin
AU - Matte, Oliver
ID - 52691
T2 - arXiv:2403.12147
TI - Feynman-Kac formulas for semigroups generated by multi-polaron Hamiltonians in magnetic fields and on general domains
ER -
TY - JOUR
AU - Ahmed, Qazi Arbab
AU - Wiersema, Tobias
AU - Platzner, Marco
ID - 52686
JF - Journal of Hardware and Systems Security
KW - General Engineering
KW - Energy Engineering and Power Technology
SN - 2509-3428
TI - Post-configuration Activation of Hardware Trojans in FPGAs
ER -
TY - CHAP
AU - Althoff, Sebastian
ED - Gasparavicius, Gediminas
ED - Toteva, Maia
ED - Williams, Tom
ID - 47619
T2 - Walking with the Enemy: Reclaiming the Language of Power and Manipulation in the Post-Truth Era
TI - Walking with Images: Mimetic-Automatic Production in Hasan Elahi’s Tracking Transcience
ER -
TY - JOUR
AU - Fuchs, Christian
ID - 52690
IS - 1
JF - tripleC: Communication, Capitalism & Critique
TI - Vincent Mosco’s Critical-Humanist Political Economy of Communication
VL - 22
ER -
TY - JOUR
AB - We explore the polarization hysteretic behaviour and field-dependent permittivity of ferroelectric-dielectric 2D materials formed by random dispersions of low permittivity inclusions in a ferroelectric matrix, using finite element simulations. We show how the degree of impenetrability of dielectric inclusions plays a substantial role in controlling the coercive field, remnant and saturation polarizations of the homogenized materials. The results highlight the significance of the degree of impenetrability of inclusion in tuning the effective polarization properties of such ferroelectric composites: coercive field drops significantly as percolation threshold is attained and remnant polarization decreases faster than a linear decay.
AU - Myroshnychenko, Viktor
AU - Mulavarickal Jose, Pious Mathews
AU - Farheen, Henna
AU - Ejaz, Shafaq
AU - Brosseau, Christian
AU - Förstner, Jens
ID - 52700
IS - 4
JF - Physica Scripta
KW - tet_topic_ferro
SN - 0031-8949
TI - From Swiss-cheese to discrete ferroelectric composites: assessing the ferroelectric butterfly shape in polarization loops
VL - 99
ER -
TY - CHAP
AU - Gövert, Andre
AU - Niederhaus, Constanze
AU - Blumberg, Eva
ID - 52505
T2 - Mehrsprachigkeit in der Schule – Sprachbildung im und durch Sachunterricht
TI - Professionalisierung für Sprachbildung aus Sicht von Sachunterrichtsstudierenden – Langzeitwirkungen eines Vertiefungsseminars in der ersten Phase der sachunterrichtsdidaktischen Lehrer* innenbildung.
ER -
TY - CHAP
AU - Vasylyeva, Tetyana
AU - Ehmke, Timo
AU - Gövert, Andre
AU - Kassem, Amani
AU - Niederhaus, Constanze
ID - 52506
T2 - Mehrsprachigkeit in der Schule – Sprachbildung im und durch Sachunterricht
TI - DaZ-Kompetenzen angehender Lehrkräfte des Faches Sachunterricht sowie der aus dem Sachunterricht hervorgehenden Fächer
ER -
TY - JOUR
AB - ABSTRACT
OBJECTIVE:
The aim of this analysis was to investigate whether habitual intake of total dairy (TD) or different dairy types (liquid, solid, fermented, not-fermented, low-fat, high-fat, low-sugar and high-sugar dairy) during adolescence is associated with biomarkers of low-grade inflammation as well as risk factors of type 2 diabetes in young adulthood.
DESIGN:
Multivariable linear regression analyses were used to investigate prospective associations between estimated TD intake as well as intake of different types of dairy and a pro-inflammatory score, based on hsCRP, IL-6, IL-18, leptin and adiponectin, and insulin resistance assessed as HOMA2-IR in an open cohort study.
SETTING:
Dortmund, Germany
PARTICIPANTS:
Data from participants (n=375) of the DOrtmund Nutritional and Anthropometric Longitudinally Designed (DONALD) study were included, for whom at least two 3-day weighed dietary records during adolescence (median age: 11 years) and one blood sample in young adulthood (>18 years) were available.
RESULTS:
There was no statistically significant association between TD intake or intake of any dairy type and the pro-inflammatory score (all p>0.05). TD intake as well as each dairy type intake and insulin resistance also showed no association (all p>0.05).
CONCLUSIONS:
The habitual intake of dairy or individual types of dairy during adolescence does not seem to have a major impact on low-grade systemic inflammation and insulin resistance in the long term. There was no indication regarding a restriction of dairy intake for healthy children and adolescents in terms of diabetes risk reduction.
AU - Hohoff, E
AU - Jankovic, N
AU - Perrar, I
AU - Schnermann, ME
AU - Herder, C
AU - Nöthlings, U
AU - Libuda, Lars
AU - Alexy, U
ID - 52713
JF - Public Health Nutrition
KW - Public Health
KW - Environmental and Occupational Health
KW - Nutrition and Dietetics
KW - Medicine (miscellaneous)
SN - 1368-9800
TI - The association between dairy intake in adolescents with inflammation and risk markers of type 2 diabetes during young adulthood – results of the DONALD study
ER -
TY - JOUR
AB - The editorial introduces the special issue Knowledge by Design in Education: Key challenges and experiences from research practice, posing key questions, offering an insight into ongoing discussions, and presenting an overview of the included articles.
AU - Brase, Alexa Kristin
AU - Jenert, Tobias
ID - 52702
IS - 1
JF - EDeR. Educational Design Research
SN - 2511-0667
TI - Knowledge by Design in Education
VL - 8
ER -
TY - JOUR
AU - Buyken, Anette
AU - Libuda, Lars
ID - 52712
JF - DGEwissen
TI - Ernährung und Alltagsbewältigung - Ein Spannungsfeld für Individuum, Haushalt und Gesellschaft
ER -
TY - JOUR
AB - Miller's rule is an empirical relation between the nonlinear and linear optical coefficients that applies to a large class of materials but has only been rigorously derived for the classical Lorentz model with a weak anharmonic perturbation. In this work, we extend the proof and present a detailed derivation of Miller's rule for an equivalent quantum-mechanical anharmonic oscillator. For this purpose, the classical concept of velocity-dependent damping inherent to the Lorentz model is replaced by an adiabatic switch-on of the external electric field, which allows a unified treatment of the classical and quantum-mechanical systems using identical potentials and fields. Although the dynamics of the resulting charge oscillations, and hence the induced polarizations, deviate due to the finite zero-point motion in the quantum-mechanical framework, we find that Miller's rule is nevertheless identical in both cases up to terms of first order in the anharmonicity. With a view to practical applications, especially in the context of ab initio calculations for the optical response where adiabatically switched-on fields are widely assumed, we demonstrate that a correct treatment of finite broadening parameters is essential to avoid spurious errors that may falsely suggest a violation of Miller's rule, and we illustrate this point by means of a numerical example.
AU - Meyer, Maximilian Tim
AU - Schindlmayr, Arno
ID - 52723
JF - Journal of Physics B: Atomic, Molecular and Optical Physics
SN - 0953-4075
TI - Derivation of Miller's rule for the nonlinear optical susceptibility of a quantum anharmonic oscillator
ER -
TY - CONF
AU - Sparmann, Sören
AU - Hüsing, Sven
AU - Schulte, Carsten
ID - 52380
T2 - Proceedings of the 23rd Koli Calling International Conference on Computing Education Research
TI - JuGaze: A Cell-based Eye Tracking and Logging Tool for Jupyter Notebooks
ER -
TY - CONF
AU - Hüsing, Sven
AU - Schulte, Carsten
AU - Sparmann, Sören
AU - Bolte, Mario
ID - 52379
T2 - Proceedings of the 55th ACM Technical Symposium on Computer Science Education V. 1
TI - Using Worked Examples for Engaging in Epistemic Programming Projects
ER -
TY - JOUR
AB - Heteroclinic structures organize global features of dynamical systems. We analyse whether heteroclinic structures can arise in network dynamics with higher-order interactions which describe the nonlinear interactions between three or more units. We find that while commonly analysed model equations such as network dynamics on undirected hypergraphs may be useful to describe local dynamics such as cluster synchronization, they give rise to obstructions that allow to design of heteroclinic structures in phase space. By contrast, directed hypergraphs break the homogeneity and lead to vector fields that support heteroclinic structures.
AU - Bick, Christian
AU - von der Gracht, Sören
ID - 52726
IS - 2
JF - Journal of Complex Networks
KW - Applied Mathematics
KW - Computational Mathematics
KW - Control and Optimization
KW - Management Science and Operations Research
KW - Computer Networks and Communications
SN - 2051-1329
TI - Heteroclinic dynamics in network dynamical systems with higher-order interactions
VL - 12
ER -
TY - JOUR
AB - Through tailoring the geometry and design of biomaterials, additive manufacturing is revolutionizing the production of metallic patient-specific implants, e.g., the Ti-6Al-7Nb alloy. Unfortunately, studies investigating this alloy showed that additively produced samples exhibit anisotropic microstructures. This anisotropy compromises the mechanical properties and complicates the loading state in the implant. Moreover, the minimum requirements as specified per designated standards such as ISO 5832-11 are not met. The remedy to this problem is performing a conventional heat treatment. As this route requires energy, infrastructure, labor, and expertise, which in turn mean time and money, many of the additive manufacturing benefits are negated. Thus, the goal of this work was to achieve better isotropy by applying only adapted additive manufacturing process parameters, specifically focusing on the build orientations. In this work, samples orientated in 90°, 45°, and 0° directions relative to the building platform were manufactured and tested. These tests included mechanical (tensile and fatigue tests) as well as microstructural analyses (SEM and EBSD). Subsequently, the results of these tests such as fractography were correlated with the acquired mechanical properties. These showed that 90°-aligned samples performed best under fatigue load and that all requirements specified by the standard regarding monotonic load were met.
AU - Milaege, Dennis
AU - Eschemann, Niklas
AU - Hoyer, Kay-Peter
AU - Schaper, Mirko
ID - 52738
IS - 2
JF - Crystals
KW - Inorganic Chemistry
KW - Condensed Matter Physics
KW - General Materials Science
KW - General Chemical Engineering
SN - 2073-4352
TI - Anisotropic Mechanical and Microstructural Properties of a Ti-6Al-7Nb Alloy for Biomedical Applications Manufactured via Laser Powder Bed Fusion
VL - 14
ER -
TY - JOUR
AB - For 0 ≤ t ≤ r let m(t, r) be the maximum number s such that every t-edge-connected r-graph has s pairwise disjoint perfect matchings. There are only a few values of m(t, r) known, for instance m(3, 3) = m(4, r) = 1, and m(t, r) ≤ r − 2 for all t = 5,
and m(t, r) ≤ r − 3 if r is even. We prove that m(2l, r) ≤ 3l − 6 for every l ≥ 3 and r ≥ 2l.
AU - Ma, Yulai
AU - Mattiolo, Davide
AU - Steffen, Eckhard
AU - Wolf, Isaak Hieronymus
ID - 49905
JF - Combinatorica
KW - Computational Mathematics
KW - Discrete Mathematics and Combinatorics
SN - 0209-9683
TI - Edge-Connectivity and Pairwise Disjoint Perfect Matchings in Regular Graphs
VL - 44
ER -
TY - CONF
AU - Jafarzadeh, Hanieh
AU - Klemme, Florian
AU - Amrouch, Hussam
AU - Hellebrand, Sybille
AU - Wunderlich, Hans-Joachim
ID - 52744
T2 - European Test Symposium, The Hague, Netherlands, May 20-24, 2024
TI - Time and Space Optimized Storage-based BIST under Multiple Voltages and Variations
ER -
TY - CONF
AU - Jafarzadeh, Hanieh
AU - Klemme, Florian
AU - Amrouch, Hussam
AU - Hellebrand, Sybille
AU - Wunderlich, Hans-Joachim
ID - 52742
T2 - IEEE Latin American Test Symposium (LATS), Maceió, Brazil, April 9-12, 2024
TI - Vmin Testing under Variations: Defect vs. Fault Coverage
ER -
TY - CONF
AU - Hellebrand, Sybille
AU - Sadeghi-Kohan, Somayeh
AU - Wunderlich, Hans-Joachim
ID - 52743
T2 - International Symposium of EDA (ISEDA), Xi'an, China, May 10-13, 2024
TI - Functional Safety and Reliability of Interconnects throughout the Silicon Life Cycle
ER -
TY - CONF
AU - Wunderlich, Hans-Joachim
AU - Jafarzadeh, Hanieh
AU - Hellebrand, Sybille
ID - 52745
T2 - International Symposium of EDA (ISEDA), Xi’an, China, May 10-13, 2024
TI - Robust Test of Small Delay Faults under PVT-Variations
ER -
TY - GEN
AU - Stiballe, Alisa
AU - Reimer, Jan Dennis
AU - Sadeghi-Kohan, Somayeh
AU - Hellebrand, Sybille
ID - 50284
TI - Modeling Crosstalk-induced Interconnect Delay with Polynomial Regression
ER -
TY - CONF
AU - Hu, Lijie
AU - Habernal, Ivan
AU - Shen, Lei
AU - Wang, Di
ED - Graham, Yvette
ED - Purver, Matthew
ID - 52827
T2 - Findings of the Association for Computational Linguistics: EACL 2024, St. Julian’s, Malta, March 17-22, 2024
TI - Differentially Private Natural Language Models: Recent Advances and Future Directions
ER -
TY - CONF
AB - Neural machine translation (NMT) is a widely popular text generation task, yet there is a considerable research gap in the development of privacy-preserving NMT models, despite significant data privacy concerns for NMT systems. Differentially private stochastic gradient descent (DP-SGD) is a popular method for training machine learning models with concrete privacy guarantees; however, the implementation specifics of training a model with DP-SGD are not always clarified in existing models, with differing software libraries used and code bases not always being public, leading to reproducibility issues. To tackle this, we introduce DP-NMT, an open-source framework for carrying out research on privacy-preserving NMT with DP-SGD, bringing together numerous models, datasets, and evaluation metrics in one systematic software package. Our goal is to provide a platform for researchers to advance the development of privacy-preserving NMT systems, keeping the specific details of the DP-SGD algorithm transparent and intuitive to implement. We run a set of experiments on datasets from both general and privacy-related domains to demonstrate our framework in use. We make our framework publicly available and welcome feedback from the community.
AU - Igamberdiev, Timour
AU - Vu, Doan Nam Long
AU - Kuennecke, Felix
AU - Yu, Zhuo
AU - Holmer, Jannik
AU - Habernal, Ivan
ED - Aletras, Nikolaos
ED - De Clercq, Orphee
ID - 52842
T2 - Proceedings of the 18th Conference of the European Chapter of the Association for Computational Linguistics: System Demonstrations
TI - DP-NMT: Scalable Differentially Private Machine Translation
ER -
TY - JOUR
AB - Due to the hydrolytic instability of LiPF6 in carbonate-based solvents, HF is a typical impurity in Li-ion battery electrolytes. HF significantly influences the performance of Li-ion batteries, for example by impacting the formation of the solid electrolyte interphase at the anode and by affecting transition metal dissolution at the cathode. Additionally, HF complicates studying fundamental interfacial electrochemistry of Li-ion battery electrolytes, such as direct anion reduction, because it is electrocatalytically relatively unstable, resulting in LiF passivation layers. Methods to selectively remove ppm levels of HF from LiPF6-containing carbonate-based electrolytes are limited. We introduce and benchmark a simple yet efficient electrochemical in situ method to selectively remove ppm amounts of HF from LiPF6-containing carbonate-based electrolytes. The basic idea is the application of a suitable potential to a high surface-area metallic electrode upon which only HF reacts (electrocatalytically) while all other electrolyte components are unaffected under the respective conditions.
AU - Ge, Xiaokun
AU - Huck, Marten
AU - Kuhlmann, Andreas
AU - Tiemann, Michael
AU - Weinberger, Christian
AU - Xu, Xiaodan
AU - Zhao, Zhenyu
AU - Steinrueck, Hans-Georg
ID - 52372
JF - Journal of The Electrochemical Society
KW - Materials Chemistry
KW - Electrochemistry
KW - Surfaces
KW - Coatings and Films
KW - Condensed Matter Physics
KW - Renewable Energy
KW - Sustainability and the Environment
KW - Electronic
KW - Optical and Magnetic Materials
SN - 0013-4651
TI - Electrochemical Removal of HF from Carbonate-based LiPF6-containing Li-ion Battery Electrolytes
VL - 171
ER -
TY - JOUR
AU - Bathelt, Lukas
AU - Djakow, Eugen
AU - Henke, Christian
AU - Trächtler, Ansgar
ID - 52871
JF - Procedia Computer Science
KW - General Engineering
SN - 1877-0509
TI - Innovative measurement system for saber curvature observation in straightening processes
VL - 232
ER -
TY - JOUR
AU - Arends, Christian
AU - Wolf, Lasse Lennart
AU - Meinecke, Jasmin
AU - Barkhofen, Sonja
AU - Weich, Tobias
AU - Bartley, Tim
ID - 52876
IS - 1
JF - Physical Review Research
KW - General Physics and Astronomy
SN - 2643-1564
TI - Decomposing large unitaries into multimode devices of arbitrary size
VL - 6
ER -
TY - JOUR
AU - Boeddeker, Christoph
AU - Subramanian, Aswin Shanmugam
AU - Wichern, Gordon
AU - Haeb-Umbach, Reinhold
AU - Le Roux, Jonathan
ID - 52958
JF - IEEE/ACM Transactions on Audio, Speech, and Language Processing
KW - Electrical and Electronic Engineering
KW - Acoustics and Ultrasonics
KW - Computer Science (miscellaneous)
KW - Computational Mathematics
SN - 2329-9290
TI - TS-SEP: Joint Diarization and Separation Conditioned on Estimated Speaker Embeddings
VL - 32
ER -
TY - JOUR
AB - Für eine gelingende Umsetzung schulischer Inklusion gilt eine professionelle Weiterbildung der Lehrkräfte und des weiteren Schulpersonals als unverzichtbare Voraussetzung, um eine effektive Teamarbeit sowie die Einbindung von Eltern[i] in Erziehungs- und Bildungsprozesse zu gewährleisten. Im Projekt BiFoKi[ii] (Bielefelder Fortbildungskonzept zur Kooperation in inklusiven Schulen) wurde eine Fortbildungsmaßnahme für inklusive Schulen entwickelt, die sowohl die intrainstitutionelle Kooperation innerhalb der Schule als auch die interinstitutionelle Zusammenarbeit mit den Eltern der Schüler*innen mit und ohne sonderpädagogischen Unterstützungsbedarf adressiert. Die Fortbildung zielt u.a. darauf ab, durch eine im Jahrgangsteam gemeinsam geplante und verantwortete Elternarbeit eine einladende Atmosphäre zu schaffen, Kommunikationswege an diverser werdende Bedarfe der Eltern und der Schüler*innen anzupassen und Eltern stärker in schulische Bildungsprozesse einzubeziehen. Zur Evaluation der Fortbildung wurde eine quasi-experimentelle Studie mit einem Prä-Post-Kontrollgruppendesign realisiert. Längsschnittliche Daten liegen für 55 Lehr- und Fachkräfte vor. Die Ergebnisse der varianzanalytischen Auswertung zeigen, dass sich die Einschätzungen zur Kooperationsbereitschaft der Eltern sowie das selbstberichtete Kooperationsverhalten im Bereich der Erziehungs- und Bildungskooperation in der Interventionsgruppe nach der Teilnahme an der Fortbildung signifikant positiver entwickelt hat als in der Kontrollgruppe.
[i] Mit dem Begriff Eltern sind hier alle erziehungs- bzw. sorgeberechtigten Personen gemeint.
[ii] Hinweis zur Finanzierung: Das diesem Beitrag zugrunde liegende Vorhaben BiFoKi (Bielefelder Fortbildungskonzept zur Kooperation in inklusiven Schulen) wurde mit Mitteln des Bundesministeriums für Bildung und Forschung unter dem Förderkennzeichen 01NV1732in der Förderlinie „Qualifizierung der pädagogischen Fachkräfte für inklusive Bildung“ gefördert (Projektleitung: Birgit Lütje-Klose, Elke Wild, Julia Gorges und Phillip Neumann).
Abstract
To implement inclusive education successfully, it is crucial that teachers and other school staff are trained to cooperate effectively as a team and to involve parents in educational processes. In the project BiFoKi (Bielefeld Training on Cooperation in inclusive), we developed an in-service training for inclusive schools that addresses the intra-institutional cooperation within schools and the inter-institutional cooperation with the parents of students with and without special educational needs. The training aims to prepare grade-level teams to create a welcoming atmosphere, adapt communication ways to the diverse needs of parents and students and to involve parents more strongly in school educational processes. To evaluate the effectiveness of the training, a quasi-experimental study with a pre-post control group design was implemented. Longitudinal data is available for 55 teachers and other professionals. The results indicate that the intervention group demonstrated a more positive development in terms of satisfaction with parents' willingness to cooperate as well as self-reported cooperative behavior in the area of educational cooperation, compared to the control group.
AU - Grüter, Sandra
AU - Gorges, Julia
AU - Lütje-Klose, Birgit
AU - Neumann, Phillip
AU - Wild, Elke
ID - 53068
IS - 3
JF - QfI - Qualifizierung für Inklusion. Online-Zeitschrift zur Forschung über Aus-, Fort- und Weiterbildung pädagogischer Fachkräfte
KW - General Medicine
SN - 2699-2477
TI - Jahrgangsteams zur Kooperation mit Eltern anregen – eine Aufgabe für Fortbildungen? Evaluationsergebnisse zum Bielefelder Fortbildungskonzept zur Kooperation in inklusiven Schulen (BiFoKi)
VL - 5
ER -
TY - JOUR
AB - Negated statements require more processing efforts than assertions. However, in certain contexts, repeating negations undergo adaptation, which over time mitigates the effort.
Here, we ask negations hamper visual processing and whether consecutive repetitions mitigate its influence.
We assessed the overall attentional capacity and its distribution, the relative weight, quantitatively using
the formal Theory of Visual Attention (TVA).
Here, we employed a very simple form for negations, binary negations. Negated instructions, expressing the only alternative to the core supposition, were cognitively demanding, resulting in a loss of attentional capacity in three experiments. The overall attentional capacity recovered gradually but stagnated at a lower level than with assertions, even after many repetitions. Additionally, negations distributed the attention equally between target and reference stimulus. Repetitions slightly increased the reference' share of attention. Assertions, on the other hand, shifted the attentional weight towards the target. Few repetitions slightly decreased the bias towards the target, many repetitions increased the bias.
AU - Banh, Ngoc Chi
AU - Tünnermann, Jan
AU - Rohlfing, Katharina J.
AU - Scharlau, Ingrid
ID - 53072
JF - Attention, Perception, & Psychophysics
TI - Benefiting from Binary Negations? Verbal Negations Decrease Visual Attention and Balance Its Distribution
ER -
TY - GEN
AU - Banh, Ngoc Chi
AU - Scharlau, Ingrid
ID - 53069
TI - Effects of task difficulty on visual processing speed
ER -
TY - CONF
AU - Razavi, Kamran
AU - Ghafouri, Saeid
AU - Mühlhäuser, Max
AU - Jamshidi, Pooyan
AU - Wang, Lin
ID - 53095
T2 - Proceedings of the 4th Workshop on Machine Learning and Systems (EuroMLSys), colocated with EuroSys 2024
TI - Sponge: Inference Serving with Dynamic SLOs Using In-Place Vertical Scaling
ER -
TY - JOUR
AB - In this work, we consider optimal control problems for mechanical systems with fixed initial and free final state and a quadratic Lagrange term. Specifically, the dynamics is described by a second order ODE containing an affine control term. Classically, Pontryagin's maximum principle gives necessary optimality conditions for the optimal control problem. For smooth problems, alternatively, a variational approach based on an augmented objective can be followed. Here, we propose a new Lagrangian approach leading to equivalent necessary optimality conditions in the form of Euler-Lagrange equations. Thus, the differential geometric structure (similar to classical Lagrangian dynamics) can be exploited in the framework of optimal control problems. In particular, the formulation enables the symplectic discretisation of the optimal control problem via variational integrators in a straightforward way.
AU - Leyendecker, Sigrid
AU - Maslovskaya, Sofya
AU - Ober-Blöbaum, Sina
AU - Almagro, Rodrigo T. Sato Martín de
AU - Szemenyei, Flóra Orsolya
ID - 53101
JF - Journal of Computational Dynamics
KW - Optimal control problem
KW - Lagrangian system
KW - Hamiltonian system
KW - Variations
KW - Pontryagin's maximum principle.
SN - 2158-2491
TI - A new Lagrangian approach to control affine systems with a quadratic Lagrange term
ER -
TY - BOOK
AB - Tax evasion, tax avoidance and tax resistance are widespread phenomena in political, economic, social and fiscal history from antiquity through medieval, early modern and modern times. Histories of Tax Evasion, Avoidance and Resistance shows how different groups and individuals around the globe have succeeded or failed in not paying their due taxes, whether in kind or in cash, on their properties or on their crops.
It analyses how, throughout history, wealthy and poor taxpayers have tried to avoid or reduce their tax burden by negotiating with tax authorities, through practices of legal or illegal tax evasion, by filing lawsuits, seeking armed resistance or by migration, and how state authorities have dealt with such acts of claim making, defiance, open resistance or elusion. It fills an important research gap in tax history, addressing questions of tax morale and fairness, and how social and political inequality was negotiated through taxation. It gives rich insights into the development of citizen-state relationships throughout the course of history. The book comprises case studies from Ancient Athens, Roman Egypt, Medieval Europe, Early Modern Mexico, the Ottoman Empire, Nigeria under British colonial rule, the United Kingdom of the early 20th century, Greece during the Second World War, as well as West Germany, Switzerland, Sweden and the United States in the 20th century, including transnational entanglements in the world of late-modern offshore finance and taxation. The authors are experts in fiscal, economic, financial, legal, social and/or cultural history.
The book is intended for students, researchers and scholars of economic and financial history, social and world history and political economy.
The Open Access version of this book, available at www.taylorfrancis.com, has been made available under a Creative Commons Attribution-Share Alike 4.0 license.
AU - Schönhärl, Korinna
AU - Hürlimann, Gisela
AU - Rohde, Dorothea
ID - 34544
KW - Tax History
KW - Financial History
SN - 9781003333197
TI - Histories of Tax Evasion, Avoidance and Resistance
ER -
TY - CHAP
AB - Jean Bodin's list on how the absolutist monarchical state could raise its revenue ranked taxation only in seventh place. From a modern legal perspective, taxes are compulsory transfers of resources that households and enterprises pay to one or several government bodies without receiving an individual, specific benefit in return. Historians have dealt with not paying taxes in various contexts, such as analysing tax resistance and tax resistance movements in history. Tax law is best understood as an outcome of long-term, often conflictual, negotiations and as an expression of specific political mentalities and ideologies. As a consequence, tax law and sometimes even the tax juridical system have a strongly politicised character. Loopholes in tax legislation that enable or facilitate avoidance or evasion can thus be regarded as a result of the interest-driven politics of parliamentary majorities, as the success of concerted lobby pressure.
AU - Schönhärl, Korinna
AU - Hürlimann, Gisela
AU - Rohde, Dorothea
ED - Schönhärl, Korinna
ED - Hürlimann, Gisela
ED - Rohde, Dorothea
ID - 34546
T2 - Histories of Tax Evasion, Avoidance and Resistance
TI - The Ability and Intention of Not Paying Taxes in History. Some Introductory Observations
ER -
TY - CHAP
AB - As a case study, this chapter examines two tax education films that were produced 11 years apart in the USA and Western Germany during and after World War II: “The New Spirit” and “Putzke wants to know”. In contrast to America's most popular cartoon character 11 years earlier, Erwin Putzke is in a terrible mood at the beginning of the short film “Putzke wants to know”. The family father and electrician with a workshop of his own is annoyed and upset by the duty of filling in his tax return, grumbling at his wife and daughter and even at their budgie. The film's tax morale message is conveyed to its audience against the backdrop of a sober post-war reality characterised by allied occupation and the Allies' say in West German tax policies during a period of laborious economic build-up after a lost war.
AU - Schönhärl, Korinna
ED - Schönhärl, Korinna
ED - Hürlimann, Gisela
ED - Rohde, Dorothea
ID - 34547
T2 - Histories of Tax Evasion, Avoidance and Resistance
TI - How to Create a Taxpaying Spirit. A Transnational Examination of an US American and a Western German Tax Education Film in and after World War II
ER -
TY - CHAP
AU - Süßmann, Johannes
ED - Drobner, Hubertus R.
ED - Stork, Hans-Walter
ID - 34973
T2 - Bücher in Westfalen – Westfalen und ihre Bücher. Festschrift für Hermann-Josef Schmalor zum 70. Geburtstag
TI - Bibliotheken des Hellwegraums als Orte frühneuzeitlichen Kulturtransfers. Aufriß und Forschungsprogramm
ER -
TY - CONF
AU - Dann, Andreas Peter
AU - Hermann, Ben
AU - Bodden, Eric
ID - 35083
TI - UpCy: Safely Updating Outdated Dependencies
ER -
TY - GEN
AU - Famula, Marta
ID - 33938
T2 - Jahrbuch Forum Vormärz Forschung 2022. [in Vorbereitung]
TI - Antonia Villinger: Dramen der Schwangerschaft. Friedrich Hebbels „Judith“, „Maria Magdalena“ und „Genoveva“. Baden-Baden: Ergon 2021
ER -