@book{63673, abstract = {{Unter welchen historischen Bedingungen und mit welchen Auswirkungen wurde der Computer zum Bestandteil des Wohnalltags? Und wie verhält es sich dabei mit Praktiken des Wohnens und Wohnungseinrichtens? Die Beiträger*innen werfen einen Blick auf die Computerisierung des Zuhauses und zeigen, wie sie sich vollzieht. Der Fokus ihrer Analysen liegt einerseits darauf, wie Arbeit und Assistenz das Wohnen im Hinblick auf den Computer prägen. Andererseits denken sie den Computer aus der Perspektive der Wohnumgebungen neu und geben so einen kompakten medienhistorischen Überblick über den Beginn des Smart Homes.}}, editor = {{Bartz, Christina and Cyrkel, Jakob and Hüttemann, Felix and Miggelbrink, Monique}}, isbn = {{978-3-8376-7115-5}}, keywords = {{Mediengeschichte, Digitale Medien, Design, Medien, Medienwissenschaft, Medienästhetik, Mediensoziologie, Medientheorie, Medienphilosophie, Architektur, Technikgeschichte, Technik, Kultur, Kulturwissenschaft, Kulturgeschichte, Kulturtheorie, Popkultur, Geschichte des 20. Jahrhunderts, Geschichtswissenschaft, Kultursoziologie, Gender Studies, Mode, Klang, Cultural Studies, Informatik}}, pages = {{336}}, publisher = {{transcript Verlag}}, title = {{{ComputerWohnen. Zur Geschichte des Computers in Wohnumgebungen zwischen Arbeit und Assistenz}}}, doi = {{10.14361/9783839471159}}, volume = {{66}}, year = {{2026}}, } @inproceedings{26389, abstract = {{Within this work, we investigate how data-driven numerical approximation methods of the Koopman operator can be used in practical control engineering applications. We refer to the method Extended Dynamic Mode Decomposition (EDMD), which approximates a nonlinear dynamical system as a linear model. This makes the method ideal for control engineering applications, because a linear system description is often assumed for this purpose. Using academic examples, we simulatively analyze the prediction performance of the learned EDMD models and show how relevant system properties like stability, controllability, and observability are reflected by the EDMD model, which is a critical requirement for a successful control design process. Subsequently, we present our experimental results on a mechatronic test bench and evaluate the applicability to the control engineering design process. As a result, the investigated methods are suitable as a low-effort alternative for the design steps of model building and adaptation in the classical model-based controller design method.}}, author = {{Junker, Annika and Timmermann, Julia and Trächtler, Ansgar}}, booktitle = {{2022 3rd International Conference on Artificial Intelligence, Robotics and Control (AIRC 2022)}}, isbn = {{978-1-6654-5946-4}}, keywords = {{Koopman Operator, Nonlinear Control, Extended Dynamic Mode Decomposition, Hybrid Modelling}}, location = {{Cairo, Egypt}}, pages = {{1--9}}, title = {{{Data-Driven Models for Control Engineering Applications Using the Koopman Operator}}}, doi = {{10.1109/AIRC56195.2022.9836980}}, year = {{2022}}, } @inproceedings{29899, abstract = {{LLC resonant converters are typically unsuitable to be applied for wide voltage-transfer ratio applications. With a full-bridge inverter, however, they can be operated in a variety of different modulations. Most notably, by permanently turning on one MOSFET and turning off the other MOSFET of the same bridge leg, the LLC can be operated in half-bridge configuration reducing the gain by a factor of two. The resonant capacitor is hereby charged to an average voltage of half the input voltage. In this modulation, however, the switch that is permanently turned on is stressed by the complete resonant current while exhibiting no switching losses. This paper proves that the frequency-doubler modulation can better balance the losses among all MOSFETs and should be the preferred mode of operation favored over the conventional half-bridge modulation. This paper analyzes the beneficial loss distribution, proposes an on-the-fly morphing modulation and discusses potential operating strategies to further reduce the junction temperature. Furthermore, it is shown that this modulation can also be altered to achieve the asymmetrical LLC operation. Experimental measurement results show that the modulation results in a substantial decrease of the maximum MOSFET temperature and shows that the converter can be smoothly transitioned during operation from full-bridge modulation to the frequency-doubler half-bridge operation and back.}}, author = {{Rehlaender, Philipp and Unruh, Roland and Hankeln, Lars and Schafmeister, Frank and Böcker, Joachim}}, booktitle = {{23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)}}, isbn = {{978-9-0758-1537-5}}, keywords = {{Resonant converter, High frequency power converter, Switched-mode power supply, Converter control, Control methods for electrical systems}}, location = {{Ghent, Belgium}}, publisher = {{IEEE}}, title = {{{Frequency-Doubler Modulation for Reduced Junction Temperatures for LLC Resonant Converters Operated in Half-Bridge Configuration}}}, doi = {{10.23919/EPE21ECCEEurope50061.2021.9570674}}, year = {{2021}}, } @book{34981, editor = {{Jacob, Joachim and Süßmann, Johannes}}, isbn = {{978-3-476-02472-5}}, keywords = {{Antikenrezeption 18. Jahrhundert Aufklärung Aufklärungsphilosophie Skeptizismus Klassizismus Weimarer Klassik Goethe Herder Winckelmann Humboldt, Wilhelm von Querelle des Anciens et des Modernes Französische Revolution Geschichtsphilosophie Aufklärungshistorie Archäologie Kunsthistorie Exzerpt Adel Landkarten Typographie Illustration Graphik Landschaft Ruine Biographie Autobiographie Lyrik Metrik Pädagogik Schulen Anthologie Editionskritik Übersetzen Kommentarliteratur Feste Latein Griechisch Freimaurer Einzelne Sammlungen Museologie Literaturtheorie Textsorten Oper Mode Anthropologie Farben Nationalismus Zeitschriften Enzyklopädien Bibliotheken Pantheon Spolien Stadtgestaltung Stadtumbau Plätze Stilpluralismus Bürgertum Architekturtheorie Architektur China Südamerika Brasilien Restauration Drama Polytheismus Musiktheorie Philosophiegeschichte Sexualität Stoa Akademien Universitäten Interieur Porzellan Tapeten Gefühle Grotesken Spielzeug Populärkultur Charakteristik Geschlechterverhältnisse Epikuräer Vedute Hermeneutik Allegorie Medizin Ernährung Gemmen Numismatik Metall Möbel Musikkritik Kelten Religionswissenschaft Aristotelismus Homer Altertumswissenschaft Mythos Idylle Roman Geschichtswissenschaft Historiographiegeschichte Verfassung Jurisprudenz Reisen Reisebericht Entdeckungsreisen Grabmäler Vollplastik Porträt Gartenkunst Bevölkerungsentwicklung Nationalökonomie Zensur Kosmopolitismus Physiognomie Kochbücher Emblematik Höfische Gesellschaft Homosexualität Körpersprache Neuhumanismus Kulturtransfer Denkmäler Zeichnung Kataloge Sport Historienmalerei Reiseandenken Tanz Kunsthandel Amerikanische Revolution Etrusker Rhetorik Biologie Sklavenhandel Brief Kinderbuch Bibelrezeption Philologien Klassische Philologie Platonismus Literaturkritik Juden Fälschung}}, publisher = {{J.B. Metzler}}, title = {{{Das 18. Jahrhundert. Lexikon zur Antikerezeption in Aufklärung und Klassizismus}}}, doi = {{https://doi.org/10.1163/2468-3418-dnpo13-all}}, volume = {{13}}, year = {{2018}}, } @article{9805, abstract = {{Piezoelectric inertia motors, also known as ``stick--slip drives'', use the inertia of a body to drive it in small steps by means of a friction contact. While these steps are classically assumed to involve stiction and sliding, the motors can also operate in ``slip--slip'' mode without any phase of static friction. This contribution provides a systematic investigation and performance comparison of different stick--slip and slip--slip modes of operation. Different criteria for comparing the motional performance of inertia motors are defined: Steady state velocity, smoothness of motion, and start-up time. Using the example of a translational inertia motor excited by an ideal displacement signal, it is found that the maximum velocity reachable in stick--slip operation is limited principally, while continuous slip--slip operation allows very high velocities. For the investigated driving signals, the motor velocity is proportional to the square root of the actuator stroke. The motor performance with these ideal signals defines an upper boundary for the performance of real motors.}}, author = {{Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}}, journal = {{Sensors and Actuators A: Physical}}, keywords = {{Inertia motor, Stick--slip drive, Mode of operation, Performance indicator, Velocity maximization, Actuator stroke}}, pages = {{90 -- 100}}, title = {{{Stick-slip and slip-slip operation of piezoelectric inertia drives - Part I: Ideal Excitation.}}}, doi = {{10.1016/j.sna.2012.11.012}}, volume = {{200}}, year = {{2013}}, } @inproceedings{9784, abstract = {{Piezoelectric inertia motors use the inertia of a body to drive it by means of a friction contact in a series of small steps. These motors can operate in ``stick-slip'' or ``slip-slip'' mode, with the fundamental frequency of the driving signal ranging from several Hertz to more than 100 kHz. To predict the motor characteristics, a Coulomb friction model is sufficient in many cases, but numerical simulation requires microscopic time steps. This contribution proposes a much faster simulation technique using one evaluation per period of the excitation signal. The proposed technique produces results very close to those of timestep simulation for ultrasonics inertia motors and allows direct determination of the steady-state velocity of an inertia motor from the motion profile of the driving part. Thus it is a useful simulation technique which can be applied in both analysis and design of inertia motors, especially for parameter studies and optimisation.}}, author = {{Hunstig, Matthias and Hemsel, Tobias and Sextro, Walter}}, booktitle = {{Ultrasonics Symposium (IUS), 2012 IEEE International}}, issn = {{1948-5719}}, keywords = {{friction, ultrasonic motors, Coulomb friction model, efficient simulation technique, friction contact, high-frequency piezoelectric inertia motor, motor characteristics prediction, numerical simulation, slip-slip mode, stick-slip mode, time-step simulation, ultrasonic inertia motor, Acceleration, Acoustics, Actuators, Computational modeling, Friction, Numerical models, Steady-state}}, pages = {{277--280}}, title = {{{An efficient simulation technique for high-frequency piezoelectric inertia motors}}}, doi = {{10.1109/ULTSYM.2012.0068}}, year = {{2012}}, } @inproceedings{9760, abstract = {{Self-optimizing systems are able to adapt their behavior autonomously according to their current self-determined objectives. Unforeseen influences could lead to dependability-critical behavior of the system. Methods are required which secure self-optimizing systems during operation. These methods to increase the dependability of the system should already be taken into consideration in the design process. This paper presents a guideline for the dependability-oriented design of self-optimizing systems, which integrates established classical methods like failure mode and effects analysis as well as methods based on self-optimization. On the one hand self-optimization is used to increase the dependability of the system by integrating objectives like safety, availability, and reliability to the objectives of the system. On the other hand methods are required to ensure the self-optimization itself. As basis for this guideline serves the principle solution of the system. The six phases of the guideline extend the design process and lead to an enhanced principle solution. Additionally, the guideline illustrates phases to implement and validate the self-optimizing system. The proposed guideline is applied to an innovative rail-bound vehicle, called RailCab, which is equipped with self-optimizing function modules.}}, author = {{Sondermann-Wölke, Christoph and Hemsel, Tobias and Sextro, Walter and Gausemeier, Jürgen and Pook, Sebastian}}, booktitle = {{Industrial Informatics (INDIN), 2010 8th IEEE International Conference on}}, keywords = {{RailCab, dependability-critical behavior, dependability-oriented design, failure mode, rail-bound vehicle, secure self-optimizing systems, self-optimizing function modules, optimisation, railways, self-adjusting systems}}, pages = {{739 --744}}, title = {{{Guideline for the dependability-oriented design of self-optimizing systems}}}, doi = {{10.1109/INDIN.2010.5549490}}, year = {{2010}}, } @inproceedings{37046, abstract = {{In this article, we present a flexible simulation environment for embedded real-time software refinement by a mixed level cosimulation. For this, we combine the native speed of an abstract real-time operating system (RTOS) model in SystemC with dynamic binary translation for fast Instruction Set Simulation (ISS) by QEMU. In order to support stepwise RTOS software refinement from system level to the target software, each task can be separately migrated between the native execution and the ISS. By adapting the dynamic binary translation approach to an efficient but yet very accurate synchronization scheme the overhead of QEMU user mode execution is only factor two compared to native SystemC. Furthermore, the simulation speed increases almost linearly according to the utilization of the task set abstracted by the native execution. Hereby, the simulation time can be considerably reduced by cosimulating just a subset of tasks on QEMU.}}, author = {{Becker, Markus and Zabel, Henning and Müller, Wolfgang}}, editor = {{Kleinjohann, L. and Kleinjohann, B.}}, isbn = {{978-3-642-15233-7}}, keywords = {{Application Programming Interface User Mode Kernel Space System Level Design Mixed Level}}, publisher = {{Springer Verlag}}, title = {{{A Mixed Level Simulation Environment for Stepwise RTOS Software Refinement}}}, doi = {{10.1007/978-3-642-15234-4_15}}, year = {{2010}}, } @article{11938, abstract = {{In this paper, parameter estimation of a state-space model of noise or noisy speech cepstra is investigated. A blockwise EM algorithm is derived for the estimation of the state and observation noise covariance from noise-only input data. It is supposed to be used during the offline training mode of a speech recognizer. Further a sequential online EM algorithm is developed to adapt the observation noise covariance on noisy speech cepstra at its input. The estimated parameters are then used in model-based speech feature enhancement for noise-robust automatic speech recognition. Experiments on the AURORA4 database lead to improved recognition results with a linear state model compared to the assumption of stationary noise.}}, author = {{Windmann, Stefan and Haeb-Umbach, Reinhold}}, journal = {{IEEE Transactions on Audio, Speech, and Language Processing}}, keywords = {{AURORA4 database, blockwise EM algorithm, covariance analysis, linear state model, noise covariance, noise-robust automatic speech recognition, noisy speech cepstra, offline training mode, parameter estimation, speech recognition, speech recognition equipment, speech recognizer, state-space methods, state-space model}}, number = {{8}}, pages = {{1577--1590}}, title = {{{Parameter Estimation of a State-Space Model of Noise for Robust Speech Recognition}}}, doi = {{10.1109/TASL.2009.2023172}}, volume = {{17}}, year = {{2009}}, }