Publications
Now showing items 101-200 of 466
Technologische Beschreibung und physiologische Bewertung eines hochaufgelösten Laserscanner- Scheinwerfersystems
(2023)
The approach of a laser scanning headlamp for adaptive light functions includes six laser sources which are deviated on a micro mirror. The oscillation of that mirror generates an extended light distribution on a white ...
Development of a modular Knowledge-Discovery Framework based on Machine Learning
(2023)
In this work, a novel knowledge discovery framework able to analyze data produced in the Gasoline Direct Injection (GDI) context through machine learning is presented and validated. This approach is able to explore and ...
Proceedings of the 15th International Workshop on Beryllium Technology (BeWS-15)
(2023)
The 15th International Workshop on Beryllium Technology (BeWS-15) was held as a joint event combining BeWS-15 and industrial forum BeYOND-IX on September 14-15, 2022 in Karlsruhe, Germany with great success as a hybrid ...
Innovative tools and design strategies
(2023)
The research deals with a question about Architecture and its design strategies, combining historical information and digital tools. Design strategies are historically defined, they rely on geometry, context, building ...
Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes
(2023)
This study systematically investigates the representation of warm conveyor belts (WCBs) in large reforecast data sets of different numerical weather prediction models and evaluates the role of WCBs for the onset and life ...
OCM 2023
(2023)
The state of the art in the optical characterization of materials is advancing rapidly. New insights have been gained into the theoretical foundations of this research and exciting developments have been made in practice, ...
Bewertung der Ökologie, Wirtschaftlichkeit und sozialen Effekte von ressourceneffizienzsteigernden Maßnahmen auf Quartiersebene – von der volkswirtschaftlichen zur akteursspezifischen Perspektive (NaMaRes): Schlussbericht des Forschungsvorhabens
(2023)
The NaMaRes project developed tools and recommendations to support sustainable and resource-efficient urban planning at the neighborhood level. The considered resources include water, materials, land, and ecosystem services. ...
Spannungseinprägende aktive Filter zur Kompensation der Stromverzerrungen von Netzstromrichtern
(2023)
In this thesis, the use of voltage-source active filters for harmonic mitigation of grid-connected power converters is proposed. Based on a modeling of this novel converter configuration, an operating strategy is derived ...
Transactive Control of Coupled Electric Power and District Heating Networks
(2023)
The design of approaches for future market-based energy network operation faces the technical challenge of needing to coordinate a vast number of network participants spatially and temporally, in order to balance energy ...
Entwicklung keramischer Vergussmassen mit Alkoxysilanen zur Steigerung der Haftfestigkeit
(2023)
The adhesion of encapsulation materials is an dendrimental factor for the robustness and functionality of a power electronic device. In this work the adhesion of ceramic potting materials was developed. A new primer was ...
A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification
(2023)
A gyrotron is used in magnetically confined plasma experiments for heating, current drive, plasma stabilization and plasma diagnostics. This work presents the first design and construction of a multi-frequency / multi-purpose ...
Thermomechanischer Kontakt und stochastische Dynamik gleitender Körper mit rauen Oberflächen
(2023)
Within this work, the friction coefficient is calculated for the dry contact of two sliding metallic bodies as a function of various physical parameters. For this purpose, a thermomechanical model is developed and evaluated ...
Thermomechanical Modeling and Experimental Characterization of Sheet Molding Compound Composites
(2023)
The aim of this work is to model and experimentally characterize the anisotropic material behavior of SMC composites on the macroscale with consideration of the microstructure. Temperature-dependent thermoelastic behavior ...
Self-learning Anomaly Detection in Industrial Production
(2023)
Configuring an anomaly-based Network Intrusion Detection System for cybersecurity of an industrial system in the absence of information on networking infrastructure and programmed deterministic industrial process is ...
Das Mobilitätsskelett
(2023)
Seemingly detached from attractive mobility alternatives in cities the car remains highly relevant in personal mobility. In order to investigate the role of the car, a new survey concept for a multidimensional analysis of ...
Technology and readout for scaling up superconducting nanowire single-photon detectors
(2023)
This work presents three advances to scale SNSPDs from few-pixel devices to large detector arrays: atomic layer deposition for the fabrication of uniform superconducting niobium nitride films of few-nanometer thickness, a ...
Fiber Orientation Tensors and Mean Field Homogenization
(2023)
Effective mechanical properties of fiber-reinforced composites strongly depend on the microstructure, including the fibers' orientation. Studying this dependency, we identify the variety of fiber orientation tensors up to ...
Vertrauen in Roboter und dessen Beeinflussbarkeit durch sprachliches Framing
(2022)
Collaborative robots (cobots) enable human-robot interactions in the workplace without safety fences. An appropriate level of trust by employees is critical to the success of these interactions. Anthropomorphic perceptions ...
Auf der Suche nach der eigenen Alma Mater
(2022)
The book provides a thorough overview of Estonians and other Estonian-born students who studied at various European universities of technology before the Second World War. In addition to Saint Petersburg and Riga, Gdansk, ...
EAS Elements for Solid Mechanics
(2023)
Proposed in the early 1990s, the enhanced assumed strain (EAS) method is one of the probably most successful mixed finite element methods for solid mechanics. This cumulative dissertation gives a comprehensive overview of ...
Microstructure modeling and crystal plasticity parameter identification for predicting the cyclic mechanical behavior of polycrystalline metals
(2023)
Computational homogenization permits to capture the influence of the microstructure on the cyclic mechanical behavior of polycrystalline metals. In this work we investigate methods to compute Laguerre tessellations as ...
Vibroakustische Analyse eines elektrischen Radnabenmotors und Optimierung durch geeignete Steuerungsansätze
(2023)
This work deals with the mechanisms of disturbing noises at the electric wheel hub motor and describes a multiphysical model which simulates them. From this, countermeasures are derived and evaluated. A vibroacoustical ...
In Situ Characterization and Modelling of Drying Dynamics for Scalable Printing of Hybrid Perovskite Photovoltaics
(2023)
Hybrid perovskite photovoltaics could play a vital role in future’s renewable energy production. However, there are still severe challenges when scaling the technology. In this work, perovskite solution films drying in ...
Numerische Modellierung und Simulation von bleifreien Relaxor-Ferroelektrikum-Kompositen
(2023)
The electromechanical behavior of two new sodium bismuth titanate based lead-free ferroelectric materials as well as bilayer composites are investigated in experiments and numerical simulations. For the Finite-Element-Method, ...
Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope
(2023)
Complementary to scattering techniques, scanning tunnelling microscopy provides atomic-scale real space information about a material's electronic state of matter. State-of-the-art designs of a scanning tunnelling microscope ...
Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error
(2023)
Warm conveyor belts (WCBs) are weather systems that substantially modulate the large-scale extratropical circulation. As they can amplify forecast errors and project them onto the Rossby wave pattern, they are of high ...
Multi-field modeling and simulation of fiber-reinforced polymers
(2023)
This work proposes a new numerical approach for analyzing the behavior of fiber-reinforced materials, which have gained popularity in various applications. The approach combines theories and methods to model the fracture ...
Das „friedliche Atom“ als Narrativ in Politik, Wissenschaft und Design
(2023)
The work deals with the iconography of the atom from the euphoria about nuclear technology of the 1950s to the anti-nuclear movement of the 1970s in the Federal Republic of Germany. Using the life and work of the German ...
Hybrid photonic assemblies based on 3D-printed coupling structures
(2023)
Photonic integrated circuits (PIC) become increasingly important for numerous applications. Mass production of PIC has become widely available, but large-volume low-cost photonic packaging still represents a challenge. ...
Multiscale Cohort Modeling of Atrial Electrophysiology
(2023)
An early detection and diagnosis of atrial fibrillation sets the course for timely intervention to prevent potentially occurring comorbidities. Electrocardiogram data resulting from electrophysiological cohort modeling and ...
Deep Reinforcement Learning zur Steigerung von Energieeffizienz und Pünktlichkeit von Straßenbahnen
(2023)
This work investigates how the energy efficiency and punctuality of streetcars can be increased by using AI. The AI is trained on two scenarios at three traffic times each. The determined driving profiles are compared with ...
Entwicklung einer Methode zum Einsatz von Reinforcement Learning für die dynamische Fertigungsdurchlaufsteuerung
(2023)
This work aims to develop a method that can reschedule the matrix production in the case of a disruption. For this purpose, different artificial intelligence methods are combined in a novel way. The developed method is ...
Zur Wechselwirkung zwischen Fahrbahntextur und Laufstreifenmischung von Pkw-Reifen
(2023)
This work aims to gain an understanding of the interactions between tread compounds and surface texture on dry and wet road conditions. If, for example, a corundum surface, which is very well-established in the tire industry, ...
Hybride und energieeffiziente Antriebe für mobile Arbeitsmaschinen
(2023)
This book contains the conference proceedings to the lectures of the 9th symposium on 28th February 2023 in Karlsruhe. The state of research and new developments in the field of drive technology for mobile machines are ...
A computational multi-scale approach for brittle materials
(2023)
Materials of industrial interest often show a complex microstructure which directly influences their macroscopic material behavior. For simulations on the component scale, multi-scale methods may exploit this microstructural ...
An analysis of current and future electricity production from biogas in Germany
(2023)
In this work a process simulation model identifies the most profitable German biogas plant types and sizes. Small manure and large-scale biowaste plants are currently the most economically attractive installations whereas ...
Timber fasteners
(2024)
Current design rules for timber joints with dowel-type fasteners require input parameters such as yield moment and withdrawal capacity, which are determined within the European framework of certification testing. Databases ...
Praxis der Digitalen Signalverarbeitung
(2017)
The basics of digital signal processing are introduced with eight practical experiments. The experiments cover a wide range of different topics such as sensor fusion, vibration analysis, acoustics and image processing. The ...
Timber Engineering
(2017)
This comprehensive book provides in-depth knowledge and understanding of design rules according to Eurocode 5. It is based on the first edition of the STEP (Structural Timber Education Programme) series, which was prepared ...
Turbulent coherent structures, Secondary currents and Sediment ridges
(2024)
The origin of secondary currents and subaqueous sediment patterns in natural rivers is analysed from first principles. For this purpose, simulations of sediment transport in canonical turbulent open channel flows are ...
Methodische Evaluation von Verfahren zur Korrektur atmosphärischer Turbulenz in Bildsequenzen
(2024)
For long horizontal propagation distances, it is the atmosphere, not the sensor technology which is responsible for the quality of acquired image data. Atmospheric turbulence causes increased blur, reduced (color) contrast ...
Plasmonic-Organic and Silicon-Organic Hybrid Modulators for High-Speed Signal Processing
(2024)
High-speed electro-optic modulators in silicon platform are introduced and experimentally verified. The devices rely on plasmonic and photonic slot waveguides and are combined with efficient organic electro-optic materials. ...
Bauen mit rezyklierten mineralischen Baustoffen
(2024)
Due to its high CO2-emissions, the concrete industry bears a significant responsibility in the necessary reduction of global CO2-emissions. The possibility of recycling is crucial in implementing sustainable concrete ...
Distributed Planning for Self-Organizing Production Systems
(2024)
In dieser Arbeit wird ein Ansatz entwickelt, um eine automatische Anpassung des Verhaltens von Produktionsanlagen an wechselnde Aufträge und Rahmenbedingungen zu erreichen. Dabei kommt das Prinzip der Selbstorganisation ...
Analyse und Separation polyphoner Musiksignale
(2024)
In this work, improved signal analysis approaches for polyphonic music recordings, based on artificial neural networks, are presented. These approaches enable an objective estimation of the recording quality of amateur ...
Multi-Physics Modelling towards the Stabilization of PAN Fibers with Microwaves Based on Experimental Data
(2024)
High energy demand is one reason for high costs of carbon fibers. One option to decrease them is to use microwave heating instead of conventional heating. In this work, steps towards a microwave assisted process during the ...
Dynamische Charakteristik von Eisenbahnrahmenbrücken
(2024)
Railway bridges are subject to dynamic loads caused by train crossings. To assess the risk of resonance, the dynamic properties are analysed using FE simulations. The identification of the dynamic system often proves to ...
Impedanzbasierte Spannungsprädiktion von Lithium-Ionen-Batterien
(2024)
This work presents a physically motivated model that predicts the cell voltage of a lithium-ion-battery based on its impedance. The model was parameterized and validated on a commercial pouch cell. In a comprehensive ...
Context-based Access Control and Attack Modelling and Analysis
(2024)
This work introduces architectural security analyses for detecting access violations and attack paths in software architectures. It integrates access control policies and vulnerabilities, often analyzed separately, into a ...
Zum Dämpfungsverhalten viskoelastischer Klebverbindungen im Stahlbau
(2024)
In this work, the damping properties of adhesively bonded joints are investigated numerically, experimentally and analytically. In numerical investigations on steel structures, the potential of bonded joints to optimise ...
Flottendatenbasierte physikalische Routenenergiebedarfsprognose
(2024)
To work towards climate goals with energetic planning functions in electric vehicles, a precise energy demand forecast along planned routes is essential, which separately quantifies relevant influences. For that this work ...
Automated Mode Recovery and Electronic Stability Control for Wendelstein 7-X Gyrotrons
(2024)
Magnetic confinement fusion relies on plasma heating and plasma control using gyrotron oscillators providing at megawatt power levels. The operational reliability decreases when operating at the performance limits due to ...
Application of Data Mining and Machine Learning Methods to Industrial Heat Treatment Processes for Hardness Prediction
(2024)
This work presents a data mining framework applied to industrial heattreatment (bainitization and case hardening) aiming to optimize processes and reduce costs. The framework analyses factors such as material, production ...
Eine Methodik zur Definition von Zielkriterien am Beispiel des tieffrequenten Geräuschkomforts eines Fahrzeugs
(2024)
Digital development using target values and criteria is necessary to reduce the development costs and duration of a vehicle. For this reason, a methodology is developed, from problem formulation and model creation to target ...
A Framework for Decentralized Stabilization in Networked Energy Systems
(2024)
This work proposes a passivity-based framework for the decentralized stabilization of networked energy systems. Its key innovation are equilibrium-independent, passivity-based conditions for modularly inferring asymptotic ...
Erfassung der Sichtweite bei Nebel durch die Kombination aus hochauflösendem Scheinwerfer und einem Kamerasystem
(2024)
In this work, the opportunities of high resolution headlamps are used in combination with camera sensors as a visibility meter in fog.
Different concepts are presented and investigated in a fog chamber. The results are ...
Referenzarchitekturmodell für Experience Management
(2024)
The recording and analysis of individual experience worlds via digital feedback communication offers new opportunities. In conjunction with the reconstruction of associated digital event chains, a customer's experience ...
Steigerung der thermischen Stabilität von warm- und kaltgewalztem Wolfram durch Kalium-Dotierung für die Fusionsenergietechnik
(2025)
Cold-rolled tungsten with high degrees of deformation exhibits exceptionally high ductility. However, the required ultra-fine-grained microstructure is thermally unstable. A promising stabilization approach is offered by ...
Analyse von Störungen und Dispositionen im ÖPNV
(2025)
In this work, disruptions and dispositions in public transport are analysed using different methods. Interviews and observations are conducted within control centres and data from the ITCS is analysed. From this, influencing ...
Der Spröd-duktil-Übergang in ultrafeinkörnigem Wolfram
(2023)
High brittle-ductile transition temperatures preclude the use of conventionally manufactured tungsten (W) as a structural material. Ultrafine grained (UFG) W materials, however, exhibit the brittle-ductile transition at ...
Optimizing photocatalysts and photoreactors for solar fuel synthesis
(2023)
The work represents a toolbox for the design of a highly efficient photocatalytic process for solar-driven synthesis. The focus is the optimization of photoreactors and photocatalysts. The described photoreactor design ...
Power Generation by Resonant Self-Actuation
(2023)
Research into micro energy harvesting systems has been driven by the need for self-sustaining, stable power sources for interconnected wireless sensors. Waste heat, particularly at temperatures below 200 °C, presents a ...
Deep material networks for efficient scale-bridging in thermomechanical simulations of solids
(2023)
We investigate deep material networks (DMN). We lay the mathematical foundation of DMNs and present a novel DMN formulation, which is characterized by a reduced number of degrees of freedom. We present a efficient solution ...
Strengthening Resilience of Supply with Essential Goods through Public-Private Emergency Collaborations
(2023)
Companies can be valuable partners in delivering essential goods but must be appropriately motivated to participate in humanitarian crisis management. This work provides valuable insights into the status of humanitarian ...
Proceedings - 33. Workshop Computational Intelligence
(2023)
The workshop proceedings contain the contributions of the 33rd workshop "Computational Intelligence" which will take place from 23.11. - 24.11.2023 in Berlin. The focus is on methods, applications and tools for Fuzzy ...
Integrierte Projektabwicklung mit Mehrparteienverträgen
(2024)
In the context of IPA projects, project participants generally try to create a system that aligns the individual interests of the participants in such a way that opportunistic behavior of the participants does not have ...
Experimental investigation of relevant road surface descriptors for tire-road noise measurements on low-absorbing road surfaces
(2024)
Ihrer Arbeit in der Originalsprache: This work aims at identifying relevant road surface characteristics to mitigate tire-road noise of free-rolling tires using a systematic approach. As using open porous roads is already ...
Stabilität und Variabilität mobilitätsbezogener Alltagshandlungen – eine qualitative soziale Netzwerkanalyse
(2023)
In order to understand the potential for change and persistence in everyday mobility-related practices, this book highlights the importance of social relationships in people's lives, such as with friends and family members, ...
Modeling Backscattering Behavior of Vulnerable Road Users Based on High-Resolution Radar Measurements
(2023)
During the evolvement of autonomous driving technology, obtaining reliable 3-D environmental information is an indispensable task in approaching safe driving. The operational behavior of automotive radars can be precisely ...
Limited Information Shared Control and its Applications to Large Vehicle Manipulators
(2024)
This work focuses on the Limited Information Shared Control and its controller design using potential games. Through the developed systematic controller design, the experiments demonstrate the effectiveness and superiority ...
Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes
(2024)
In this work, the first simulation model of oxygen depolarized cathodes (ODC), which are silver catalyst-based gas diffusion electrodes, is presented that considers the phase equilibrium of the gas-liquid interface and ...
Light Field Imaging for Deflectometry
(2023)
Optical measurement methods are becoming increasingly important for high-precision production of components and quality assurance. The increasing demand can be met by modern imaging systems with advanced optics, such as ...
Roboter für Assistenzfunktionen
(2024)
The performance and flexibility of robot technologies make it possible to bring robots to everyday life. This creates many challenges: safety, legal regulations, reliability, reusability, and business models must be ...
Chip-scale optical frequency comb sources for terabit communications
(2022)
To keep up with the ever-increasing data transmission speed needs, data center interconnects are scaling up to provide multi-Tbit/s connectivity. These links require a high number of WDM channels, while the associated ...
Kleinskalige Charakterisierung der Fest-Flüssig-Trennung und Betrachtung des Scherbruchs von Proteinkristallen
(2022)
Proteins are macromolecules composed of amino acids that are essential for a large number of biological metabolic processes. Proteins are also used in technical applications, for example to catalyze reactions. The objective ...
Der grundrechtliche Schutz der digitalen Identität unter Berücksichtigung von Datenschutz- und IT-Sicherheitsrecht
(2022)
The digital identity is the essential human data interface when interacting on the Internet or with IT systems to enable the multitude of services. No platform can be used without creating a (at least temporary) data ...
Automatisierte, minimalinvasive Sicherheitsanalyse und Vorfallreaktion für industrielle Systeme
(2022)
Automated defense and prevention measures designed to protect industrial automation and control systems often compromise their real-time processing, resilience and redundancy. Therefore, they need to be performed as ...
Reconstruction from Spatio-Spectrally Coded Multispectral Light Fields
(2022)
In this work, spatio-spectrally coded multispectral light fields, as taken by a light field camera with a spectrally coded microlens array, are investigated. For the reconstruction of the coded light fields, two methods, ...
Dynamic Incentives for Optimal Control of Competitive Power Systems
(2022)
This work presents a real-time dynamic pricing framework for future electricity markets. Deduced by first-principles analysis of physical, economic, and communication constraints within the power system, the proposed ...
Topologie-Optimierung eines radselektiv angesteuerten Fahrzeugs basierend auf einer optimalen Fahrzeugführungsregelung
(2022)
The electrification and automation of passenger vehicles promote innovations of the entire vehicle architecture. If wheel-selective steered and driven vehicles are considered, challenges of urban regions can be met. In ...
Efficient fast Fourier transform-based solvers for computing the thermomechanical behavior of applied materials
(2022)
The mechanical behavior of many applied materials arises from their microstructure. Thus, to aid the design, development and industrialization of new materials, robust computational homogenization methods are indispensable. ...
Interaktionstechniken für mobile Augmented-Reality-Anwendungen basierend auf Blick- und Handbewegungen
(2022)
Intuitive interaction techniques are essential for mobile augmented reality systems. For implicit interaction, this work presents techniques for automatic eye movement analysis and visualization. In the context of explicit ...
Kursbuch Geschichte der europäischen und globalen Moderne
(2022)
“Kursbuch Geschichte der europäischen und globalen Moderne” offers a compendium and study book on types of events, central terms and learning strategies in modern and contemporary European and global history as an exemplary ...
Consistent View-Based Management of Variability in Space and Time
(2022)
Developing variable systems faces many challenges. Dependencies between interrelated artifacts within a product variant, such as code or diagrams, across product variants and across their revisions quickly lead to ...
Dynamical Modeling and Control of Multiphase Heat Transport Systems Based on Loop Heat Pipes
(2022)
Effective heat transport systems in aerospace are based on multiphase loop heat pipes (LHPs). For a precise thermal control of the electronics, electrical heaters are additionally used to control the operating temperature ...
Forum Bildverarbeitung 2022
(2022)
Fiber-dependent injection molding simulation of discontinuous reinforced polymers
(2022)
This work presents novel simulation techniques for injection molding of fiber reinforced polymers. These include approaches for anisotropic flow modeling, hydrodynamic forces from fluid on fibers, contact forces between ...
Advanced Elastocaloric Cooling Devices Based on Shape Memory Alloy Films
(2022)
Elastocaloric cooling is an emerging solid-state cooling technology with the potential to provide environmentally friendly, efficient cooling. The elastocaloric effect in superelastic shape memory alloy films is used to ...
Distributed Optimization with Application to Power Systems and Control
(2022)
Mathematical optimization techniques are among the most successful tools for controlling technical systems optimally with feasibility guarantees. Yet, they are often centralized—all data has to be collected in one central ...
Cross-Border Collaboration in Disaster Management
(2022)
In recent years, disaster events spreading across national borders have increased, which requires improved collaboration between countries. By means of an agent-based simulation and an empirical study, this thesis provides ...
Human-Machine Cooperative Decision Making
(2022)
The research reported in this thesis focuses on the decision making aspect of human-machine cooperation and reveals new insights from theoretical modeling to experimental evaluations: Two mathematical behavior models of ...