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  • Books  (3,655)
  • KIT Scientific Publishing  (2,056)
  • Project Gutenberg  (1,599)
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  • 1
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    Machine Learning for Camera-Based Monitoring of Laser Welding Processes (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The increasing use of automated laser welding processes causes high demands on process monitoring. This work demonstrates methods that use a camera mounted on the focussing optics to perform pre-, in-, and post-process monitoring of welding processes. The implementation uses machine learning methods. All algorithms consider the integration into industrial processes. These challenges include a small database, limited industrial manufacturing inference hardware, and user acceptance.
    Keywords: CNN; stacked dilated U-Net; semantic segmentation; hairpin technology; laser welding; quality assurance; machine learning; Qualitätssicherung; semantische Segmentierung; Hairpin Technologie; Laserschweißen; Maschinelles Lernen; Künstliche Intelligenz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 2
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    Inverse dynamics of underactuated flexible mechanical systems governed by quasi-linear hyperbolic partial differential equations (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This work is about the inverse dynamics of underactuated flexible mechanical systems governed by quasi-linear hyperbolic partial differential equations subjected to time-varying Dirichlet boundary conditions that are enforced by unknown, spatially disjunct, hence non-collocated Neumann boundary conditions.
    Keywords: Flexible multibody dynamics; (Cosserat-) Continuum; Underactuation; Inverse dynamics; Soft-robotics; Flexible Mehrko¨rperdynamik; (Cosserat-) Kontinuum; Unteraktuierung; Inverse Dynamik ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: English
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  • 3
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    Roboter für Assistenzfunktionen (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-14
    Description: 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 considered under special conditions. The acceptance and interaction of humans and robots are of central importance for the success of the applications. This collection summarises 15 studies from the BMBF-funded program "Robots for Assistance: Interaction in the Field.
    Keywords: human-robot-interaction (HRI); assistance robots; service robots; Mensch-Roboter-Interaktion (MRI); Assistenzroboter; Serviceroboter; Roboter im Alltag ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 4
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    Peptoide als potenzielle antibiotische Wirkstoffe gegen multiresistente Bakterien (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-06
    Description: There are fewer and fewer treatment options available for treating multi-resistant germs. In this work, peptoids were investigated as a possible class of substances for the therapeutic application of infections with multidrug-resistant bacteria, showing their antimicrobial activity against gram-positive bacteria, gram-negative bacteria, mycobacteria and fungi.
    Keywords: multiresistent; antibacterial; antimicrobial; Peptoids; Staphlococcus Aureus; Multiresistent; Antibakteriell; Antimikrobiell; Peptoide ; thema EDItEUR::K Economics, Finance, Business and Management::KN Industry and industrial studies::KND Manufacturing industries::KNDC Chemical, biotechnology and pharmaceutical industries
    Language: German
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  • 5
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    Nutzung der keramischen Glühkerze als Sensorelement (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This work presents methods for using the ceramic glow plug as a sensor element. This means that the ceramic glow plug will not only perform its conventional task as a heating element but will also provide information, such as motor speed, from the combustion chamber as a sensor. The main focus will be on the change in resistance, particularly under the influence of a temperature change, in the immediate vicinity of the ceramic glow plug.
    Keywords: glow plug; Ceramic glow plug; Sensor; Drehzahlbestimmung; Glühkerze; Keramikglühkerze ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 6
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    Trajectory optimization based on recursive B-spline approximation for automated longitudinal control of a battery electric vehicle (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This work describes a method for weighted least squares approximation of an unbounded number of data points using a B-spline function. The method can shift the bounded B-spline function definition range during run-time. The approximation method is used for optimizing velocity trajectories for an electric vehicle with respect to travel time, comfort and energy consumption. The trajectory optimization method is extended to a driver assistance system for automated vehicle longitudinal control.
    Keywords: vehicle longitudinal control; Kalman filter; approximation; B-spline; trajectory optimization; Fahrzeuglängsführung; Kalmanfilter; Approximation; B-Spline; Trajektorienoptimierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 7
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    State-of-the-Art of High-Power Gyro-Devices (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This report presents an update of the experimental achievements published in the review “State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers”, Journal of Infrared, Millimeter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) and in the KIT Scientific Report 7761 (2021), related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.
    Keywords: Dielectric Vacuum Windows; Gyro-Amplifier; Gyro-BWO; Gyrotron-Oscillator; Dielektrische Vakuumfenster; CARM; Gyro-Verstärker; Gyro-RWO; Gyrotron-Oszillator ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 8
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    Der Quasi-n-Level Betrieb des Flying Capacitor Umrichters für Mittelspannungsanwendungen (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: The quasi-n-level operation of the flying capacitor converter (FCCs) is an optimized operation mode of a multilevel converter. The quasi-n-level operation of a multilevel converter was presented with an analysis of its advantages and disadvantages. For the Q2LB of the FCC, the theory as well as the control, modulation and balancing algorithms are presented. A medium voltage prototype was built to validate the theory.
    Keywords: medium voltage; flying capacitor converter; multilevel converter; Mittelspannungsanwendungen; Flying Capacitor Umrichter; Multilevel Umrichter; Quasi-n-Level Betrieb ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 9
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    Nutzung von Blickbewegungen für die Mensch-Computer-Interaktion mit dynamischen Bildinhalten am Beispiel der Videobildauswertung (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-14
    Description: Interaction with dynamic image content is challenging for user perception, cognition and motor action. This dissertation identifies appropriate gaze-based interaction techniques for moving object selection in image sequences using multiple cross-sectional and one longitudinal user study. Further investigations evaluate how gaze-based interaction and automated image exploitation algorithms support human video exploitation as well as whether gaze-based user task classification is feasible.
    Keywords: gaze-based task classification; automated image exploitation algorithms; moving object selection; eye gaze interaction; human-computer interaction; blickbasierte Aufgabenklassifikation; automatische Bildauswerteverfahren; Selektion bewegter Objekte; Blickinteraktion; Mensch-Computer-Interaktion ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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  • 10
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    Fahrassistenz (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-01
    Description: Driving assistance systems are automotive basic equipment whilst promises of autonomous driving are still subject of dispute. Both are based on ideas of simplifying and automating the driving process that have a long history. The interdisciplinary study shows how the early automobiles of the late 19th century became the car we know today by means of assistance systems only. This volume reveals the role they played throughout the history of the automobile.
    Keywords: Assistance Systems; Autonomous Driving; Technology Assessment; Mobility Studies; History of Technology; Assistenzsysteme; Autonomes Fahren; Technikfolgenabschätzung; Mobilitätsgeschichte; Technikgeschichte ; thema EDItEUR::N History and Archaeology::NH History
    Language: German
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  • 11
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    Intelligent Reflecting Surfaces in Wireless Communication Systems (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Accompanied with the development of the wireless communication technologies, the high data traffic is more necessary for civil and industrial applications than ever The concept of an intelligent reflective surface (IRS) has attracted considerable attention recently as a low-cost solution. As the main contribution, the dissertation creates new state-of-the-art and formulates a solid milestone for the IRS research field.
    Keywords: Signal Processing; Communication Systems; Wireless Communication; Intelligent Reflecting Surface; Signalverarbeitung; Kommunikationssysteme; drahtlose Kommunikation; Intelligente reflektierende Oberfläche ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 12
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    Optimizing photocatalysts and photoreactors for solar fuel synthesis (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 strategy is based on numerical methods mapping radiation transport and additive manufacturing delivering prototypes. The photocatalyst engineering is based on suitable photocatalyst support strategies and a method for the determination of the quantum yield in photoreactions.
    Keywords: photocatalyst; photoreactor; photoreaction engineering; solar fuels; Artificial photosynthesis; Fotokatalysator; Fotoreaktor; Fotoreaktionstechnik; Solare Kraftstoffe; Künstliche Fotosynthese ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
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  • 13
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    Experimental investigation of relevant road surface descriptors for tire-road noise measurements on low-absorbing road surfaces (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 known as an efficient measure to reduce tire rolling noise, this study will focus on compact road surfaces which have a low acoustic absorption. Measurements on standardized ISO 10844 test tracks and on public roads are used to study the norm's representativity and its completeness.
    Keywords: Groove Resonance; Road surface characteristics; Tire-Road Noise; Rillenresonanz; ISO 10844; Fahrbahneigenschaften; Reifen-Fahrbahn-Geräusch ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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  • 14
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    Dynamic Model-based Analysis of Oxygen Reduction Reaction in Gas Diffusion Electrodes (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 structure-related inhomogeneities in electrolyte distribution. By means of the model it has been identified that mass transport of water and ions in the liquid phase is a crucial factor for electrode performance and how it is influenced by the electrode structure.
    Keywords: Chlor-alkali electrolysis; Three-phase model; Electrochemical Mass Spectroscopy; Inhomogeneous electrode structure; Chloralkali-Elektrolyse; Dreiphasen Modellierung; Elektrochemische Massenspektroskopie; Maxwell-Stefan Diffusion; Inhomogene Elektrodenstruktur ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 15
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    Modellbasierte prädiktive Längsdynamikregelung für künftige Fahrerassistenz- und Automatisierungssysteme (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: A fundamental requirement for future automated vehicles is that curbs and other bumps in the road can be driven over safely, reliably and accurately. This work presents a concept for a model-based, predictive longitudinal vehicle dynamics control. It demonstrates in practice how the knowledge of the road profile ahead can be used to both increase the control performance and improve the driving comfort.
    Keywords: Preview; Longitudinal Motion Control; Road Profile Disturbances; Vehicle Dynamics; Vorausschau; Längsregelung; Störungen durch Fahrbahnprofil; Two Point Tire Model; Fahrzeugdynamik ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 16
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    Verhaltensentscheidung für automatisierte Fahrzeuge mittels Arbitrationsgraphen (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: This work proposes a system architecture for secure and robust behavioral decision-making for automated vehicles. It assembles basic behavior blocks in a hierarchical arbitration graph and ensures safety through verification and diverse levels of fallback. The presented method contributes to a transparent and comprehensible decision-making process and produces safe and stable driving behavior even at high failure rates.
    Keywords: safety verification; automated driving; hierarchical arbitration graphs; behaviour planning; decision-making; Verifikation; automatisiertes Fahren; hierarchische Arbitrationsgraphen; Verhaltensplanung; Verhaltensentscheidung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 17
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    Analyse und Modellbildung von PEM-Brennstoffzellen mittels elektrochemischer Impedanzspektroskopie (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents a physically motivated model for predicting the current/voltage behavior of PEM fuel cells. Extensive impedance measurements and DRT analyses were used to identify and quantify all loss processes. The developed model was successfully validated and provides insights into the internal processes of the fuel cell. It enables targeted optimization and shows great potential for increasing the performance of PEM fuel cells.
    Keywords: Ersatzschaltbild; Modellierung; Verteilungsfunktion; Impedanzspektroskopie; PEM-Brennstoffzelle ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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  • 18
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    Auslegung von Verstärkungen ermüdungsgeschädigter Stahlbauteile mit aufgeklebten Faserverbundwerkstoffen (2024)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: Within the scope of the present work, extensive experimental and numerical investigations are carried out on the crack propagation behaviour in steel plates under cyclic loading, which have been reinforced with adhesively bonded CFRP lamellas, as well as on the load-bearing and failure behaviour of CFRP-steel double-lap joints. Based on the results, a fracture mechanics engineering procedure for estimating the remaining service life of CFRP-reinforced steel plates is developed and validated.
    Keywords: Adhesive; Fiber Reinforced Plastics; Rehabilitation; Crack Propagation; Fatigue; Klebtechnik; Faserverstärkte Kunststoffe; Sanierung; Rissfortschritt; Ermüdung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies::TDC Industrial chemistry and chemical engineering::TDCP Plastics and polymers ; thema EDItEUR::M Medicine and Nursing::MQ Nursing and ancillary services::MQV Rehabilitation ; thema EDItEUR::W Lifestyle, Hobbies and Leisure::WK Home and house maintenance::WKR Home renovation and extension ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies::TDC Industrial chemistry and chemical engineering::TDCP Plastics and polymers ; thema EDItEUR::M Medicine and Nursing::MQ Nursing and ancillary services::MQV Rehabilitation ; thema EDItEUR::W Lifestyle, Hobbies and Leisure::WK Home and house maintenance::WKR Home renovation and extension
    Language: German
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  • 19
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    Integrierte Projektabwicklung mit Mehrparteienverträgen (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 negative consequences for the project as a whole. This paper systematizes the current state of knowledge on IPA and examines the economics of these approaches.
    Keywords: construction management; project delivery; performance; multi-party-contract; integrated project delivery; Bauprojektmanagement; Projektabwicklung; Wirtschaftlichkeit; Mehrparteienverträge; Integrierte Projektabwicklung ; thema EDItEUR::R Earth Sciences, Geography, Environment, Planning
    Language: German
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  • 20
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    Methode zur Ermittlung optimaler Rad- und Reifendimensionen in der frühen Entwicklungsphase von Personenkraftwagen (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In the context of the present work methods are developed, which allow the statistical estimation of feasible ranges of functional tyre characteristics for any combination of rim and tyre dimension under different operating conditions. Therefore, measurement data regarding energy efficiency, driving dynamics and comfort are statistically analyzed and interpreted with regard to their physical root causes.
    Keywords: Functional Tyre Characteristics (FTC); Rim dimension; Tyre dimension; Rim; Tyre; Funktionale Reifeneigenschaften (FTC); Raddimension; Reifendimension; Rad; Reifen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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  • 21
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    Limited Information Shared Control and its Applications to Large Vehicle Manipulators (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 of this concept compared to traditional manual and non-cooperative control approaches in the application of large vehicle manipulators.
    Keywords: Experimental Validation; Vehicle Manipulator; Cooperative Shared Control; Potential Games; Differential Games; Experimentelle Validierung; Mobile Arbeitsmaschinen; Kooperative Regelung; Potenzialspiele; Differenzialspiele ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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  • 22
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    Power Generation by Resonant Self-Actuation (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 promising but challenging energy source to recover using current conversion technology.
    Keywords: miniature energy harvesting; resonant self-actuation; thermomagnetic; power generation; Energy; Miniatur-Energie; ernteresonante Selbstaktivierung; thermomagnetisch; Stromerzeugung; Energie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
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  • 23
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    Transactive Control of Coupled Electric Power and District Heating Networks (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 supply and demand, while achieving secure network operation. To meet this challenge, the research field of transactive control emerged. Within this work a new transactive control approach for coupled electric power and district heating networks is presented.
    Keywords: Transactive Control; Wärmenetze; Stromnetze; Sektorenkopplung; Energiemärkte; District Heating Networks; Electric Power Networks; Energy Markets ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 24
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    Proceedings of the International Workshop on Medical Ultrasound Tomography: 14.-15. Oct. 2019, Wayne State University, Detroit, Michigan, USA (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Ultrasound Tomography is an emerging technology for medical imaging that is quickly approaching its clinical utility. Research groups around the globe are engaged in research spanning from theory to practical applications. The International Workshop on Medical Ultrasound Tomography 2019 brought together scientists to exchange their knowledge and discuss new ideas and results in order to boost the research in Ultrasound Tomography.
    Keywords: Ultraschall Tomographie ; Medizinische Bildgebung ; Ultrasound Tomography ; Medical Imaging ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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  • 25
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    Einfluss des Alkali/Niob-Verhältnisses und der Kupferdotierung auf das Sinterverhalten, die Strukturbildung und die Mikrostruktur von bleifreier Piezokeramik (K0,5Na0,5)NbO3 (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Kalium-Natrium-Niobat (KNN) ist eine bleifreie ferroelektrische Keramik. Seine Herstellung ist aufgrund des hygroskopischen Verhaltens von Alkalikarbonat und Verdampfung bei hohen Temperaturen eine Herausforderung. Während des Herstellungsverfahrens wird die erwünschte Stöchiometrie schwanken. Undotierten und kupferdotierten KNN mit Alkali- oder Niobüberschüssen wurden hergestellt. Ihre Strukturbildung, Sinterverhalten, Mikrostrukturbildung und ihre elektrischen Eigenschaften werden untersucht.
    Keywords: T1-995 ; ferroelektrisch ; Stöchiometrie ; piezoelektrisch ; Keramik ; bleifrei ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TD Industrial chemistry and manufacturing technologies::TDC Industrial chemistry and chemical engineering::TDCQ Ceramic and glass technology
    Language: German
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  • 26
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    Perspectives on warm conveyor belts - sensitivities to ensemble configuration and the role for forecast error (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-04
    Description: 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 relevance for numerical weather prediction. This work elaborates on two aspects of WCBs in the context of ensemble forecasts: (1) sensitivities of WCBs to the representation of initial condition and model uncertainties, and (2) the role of WCBs for forecast error growth.
    Keywords: Numerische Wettervorhersage ; Vorhersageunsicherheit ; Warmluftförderbänder ; Numerical weather prediction ; Forecast uncertainty ; Warm conveyor belts ; thema EDItEUR::P Mathematics and Science::PH Physics ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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  • 27
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    Microstructure modeling and crystal plasticity parameter identification for predicting the cyclic mechanical behavior of polycrystalline metals (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 computational cells of polycrystalline microstructures, propose a new method to assign crystallographic orientations to the Laguerre cells and use Bayesian optimization to find suitable parameters for the underlying micromechanical model from macroscopic experiments.
    Keywords: Polykristalline Metalle; Ermüdung; Mikromechanische Modellierung; Laguerre-Kachelungen; Texturkoeffizienten-Optimierung; Polycrystalline metals; Fatigue; Micromechanical modeling; Laguerre tessellations; Texture coefficients optimization ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    Thermomechanical Modeling and Experimental Characterization of Sheet Molding Compound Composites (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 and failure behavior are modeled and the corresponding material properties are determined experimentally. Additionally, experimental biaxial damage investigations are performed. A parameter identification merges modeling and experiments and validates the models.
    Keywords: SMC Verbundwerkstoff; Thermomechanische Eigenschaften; Mikrostrukturbasierte Makromodellierung; Biaxiale Schädigungs- und Versagens-Experimente; SMC composite; Thermomechanical properties; Microstructure-based macro modeling; Biaxial damage and failure experiments ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    Architecture-based Evolution of Dependable Software-intensive Systems (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: This cumulative habilitation thesis, proposes concepts for (i) modelling and analysing dependability based on architectural models of software-intensive systems early in development, (ii) decomposition and composition of modelling languages and analysis techniques to enable more flexibility in evolution, and (iii) bridging the divergent levels of abstraction between data of the operation phase, architectural models and source code of the development phase.
    Keywords: Software and Systems Engineering; Software-intensive Systeme; Evolution; Verlässlichkeit; Systemarchitektur; Software-intensive Systems; Dependability; System Architecture ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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    A computational multi-scale approach for brittle materials (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 information. This work is devoted to a multi-scale approach for brittle materials. Based on a homogenization result for free discontinuity problems, we present FFT-based methods to compute the effective crack energy of heterogeneous materials with complex microstructures.
    Keywords: Effektive Rissenergie; FFT-basierte Homogenisierungsmethoden; Phasenfeld-Bruchmechanik; Minkowski-Tensoren; Fast-Marching-Methoden; Effective crack energy; FFT-based computational homogenization; Phase-field fracture; Minkowski tensors; Fast marching methods ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    A First 2 MW-Class (136)/170/204 GHz Multi-Frequency Gyrotron Pre-Prototype for DEMO: Design, Construction and Key Components Verification (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 coaxial-cavity pre-prototype gyrotron operating at (136)/170/204 GHz with an output power of 2 MW. It is the first step towards operating frequencies up to 240 GHz using the coaxial-cavity gyrotron technology.
    Keywords: mode generator; multi-frequency operation; electron vacuum tube; gyrotron; nuclear fusion; Modenerzeuger; Mehrfrequenzbetrieb; Vakuumröhre; Gyrotron; Kernfusion ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Zur Wechselwirkung zwischen Fahrbahntextur und Laufstreifenmischung von Pkw-Reifen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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, is used on the tire test bench instead of a real track surface, for wet track conditions ranking inversions in the tested compounds occur.
    Keywords: PKW-Reifen; Laufstreifenmischung; Fahrbahntextur; Kraftübertragung; Passenger Car; Tire Tread Compound; Road Surface Texture; Traction ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Integration of Flywheel Energy Storage Systems in Low Voltage Distribution Grids (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: A Flywheel Energy Storage System (FESS) can rapidly inject or absorb high amounts of active power in order to support the grid, following abrupt changes in the generation or in the demand, with no concern over its lifetime. The work presented in this book studies the grid integration of a high-speed FESS in low voltage distribution grids from several perspectives, including optimal allocation, sizing, modeling, real-time simulation, and Power Hardware-in-the-Loop testing.
    Keywords: Schwungräder; Energiespeicher; Echtzeitsimulation; Power Hardware-in-the-Loop-Tests; Flywheels; Energy Storage; Real-time Simulation; Power Hardware-in-the-Loop Testing ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Proceedings - 33. Workshop Computational Intelligence (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 systems, Artificial Neural Networks, Evolutionary algorithms and Data mining methods as well as the comparison of methods on the basis of industrial and benchmark problems.
    Keywords: Modelling and Simulation; Fuzzy Systems; Artificial Intelligence; Maschine Learning; Modellierung und Simulation; Computational Intelligence; Fuzzy Systeme; Künstliche Intelligenz; Maschinelles Lernen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English , German
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    Proceedings of the 15th International Workshop on Beryllium Technology (BeWS-15) (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 event. The workshop was organized by the Karlsruhe Institute of Technology. Participants came from Germany, the US, the UK, Kazakhstan, Latvia, Czech Republic, Japan, Sweden, France and China, totaling 55 persons, which was not expected immediately after the global pandemic.
    Keywords: fabrication of beryllides; neutron and ion irradiation; Fertigung von Legierungen aus Beryllium; Bestrahlung; Beryllium; safety; nuclear fusion; Kernfusion; beryllium; Sicherheit ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    Modellbasierte Entscheidungsunterstützung für Vertraulichkeit und Datenschutz in Geschäftsprozessen (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-07
    Description: Information Confidentiality and Data Protection Networks (ICPN) support process modelers and process managers in not only taking a purely technical view of data protection and confidentiality, but also in taking it into account at an early stage in the design of business processes. The Petri-net extension ICN published in the book makes it possible to systematically consider confidentiality and data protection aspects within business process models.
    Keywords: Geschäftsprozessmodellierung; Petri-Netze; Vertraulichkeit; IT-Sicherheit; Datenschutzmodellierung; Business Process Modeling; Petri Nets; Confidentiality; IT Security; Data Protection Modeling
    Language: German
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    Model-based Filtering of Interfering Signals in Ultrasonic Time Delay Estimations (2023)
    KIT Scientific Publishing
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    Publication Date: 2023-01-17
    Description: This work presents model-based algorithmic approaches for interference-invariant time delay estimation, which are specifically suited for the estimation of small time delay differences with a necessary resolution well below the sampling time. Therefore, the methods can be applied particularly well for transit-time ultrasonic flow measurements, since the problem of interfering signals is especially prominent in this application.
    Keywords: Laufzeitschätzung; Analytische Wavelet-Pakete; Ultraschalldurchflussmessung; Time Delay Estimation; Analytic Wavelet Packets; Ultrasonic Flow Measurement ; bic Book Industry Communication::T Technology, engineering, agriculture::TH Energy technology & engineering::THR Electrical engineering
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    Energy-efficient, scalable and modular industrial microwave applicator for high temperature alkaline hydrolysis of PET (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Microwave-assisted alkaline hydrolysis of PET can be 20 times faster and at lower temperatures. This work presents a novel industrial microwave applicator at 2.45 GHz with homogeneous distribution to support this reaction, which allows an efficient and continuous operation. In addition, an innovative dielectric and calorimetric measurements setup is presented. Furthermore, the modelling of the reaction kinetics based on the measured dielectric parameters is presented.
    Keywords: Mikrowellen; dielektrische Messungen; industrieller Maßstab; alkalische Hydrolyse von PET; microwaves; dielectric measurements; industrial scale; alkaline hydrolysis of PET ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Multisensorielle Navigation und Kartierung in schwierigen Bedingungen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Robust navigation as well as mapping of the environment are critical for autonomous aerial vehicles. This is especially challenging in poor visual conditions or degraded GNSS. Therefore, this thesis proposes multi-sensor fusion approaches based on FMCW radar, cameras and inertial sensors. These approaches can cope with such challenging conditions as demonstrated in different scenarios.
    Keywords: Sensorfusion; Navigation; Kartierung; FMCW-Radar; Thermalkamera; sensorfusion; navigation; mapping; FMCW radar; thermal camera ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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    Vibroakustische Analyse eines elektrischen Radnabenmotors und Optimierung durch geeignete Steuerungsansätze (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 optimized control approach, was developed and applied to the system. Furthermore, limitations and the interaction of the optimized control approach with the motor control are examined more detail.
    Keywords: elektrische Maschine; NVH; Akustik; HCI; Radnabenmotor; electric machine; acoustic; wheel hub motor ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Deep material networks for efficient scale-bridging in thermomechanical simulations of solids (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 technique for nonlinear DMNs to accelerate complex two-scale simulations with minimal computational effort. A new interpolation technique is presented enabling the consideration of fluctuating microstructure characteristics in macroscopic simulations.
    Keywords: deep material networks; data-driven modeling; Two-scale simulations; Deep Material Networks; Datengetriebene Modellierung; Zweiskalensimulationen; micromechanics; Mikromechanik; machine learning; Maschinelles Lernen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    An analysis of current and future electricity production from biogas in Germany (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-03-30
    Description: 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 the valorization of energy crops turns out to be unprofitable. Future developments are assessed with the help of a regional optimization model under constraints. Capacity expansion concerns small-scale manure and biowaste installations rather than plants based on energy crops.
    Keywords: Biogas ; Simulation ; Optimierung ; Szenarien ; simulation ; optimization ; scenarios ; thema EDItEUR::K Economics, Finance, Business and Management::KC Economics
    Language: English
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    Das Mobilitätsskelett (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 urban mobility is presented: the travel skeleton. The modular design combines the collection of everyday trips in a typical week with occasional long-distance trips in a quasi-longitudinal approach. The concept also captures associated psychographic characteristics.
    Keywords: Urbane Mobilität; Verkehrserhebungen; Mobilitätsskelett; Mobilitätspsychologie; Fernverkehr; Urban mobility; travel surveys; travel skeleton; mobility psychology; long-distance travel ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: German
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    Technologische Beschreibung und physiologische Bewertung eines hochaufgelösten Laserscanner- Scheinwerfersystems (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 light converter which is then projected on the road. This work describes that approach and presents methods to evaluate the homogeneity of headlamp light distributions.
    Keywords: automotive light functions; homogeneity; laser scanning; Headlamp; Fahrzeug-Lichtfunktionen; Homogenität; Laser-Scanner; Scheinwerfer ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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    Hybride und energieeffiziente Antriebe für mobile Arbeitsmaschinen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 reported in 12 articles. The conference proceedings are characterized by technical contributions on climate-neutral, efficiency-optimized and electrified drives in a variety of machines. In addition to traction drives, drive systems for performing work tasks are also addressed.
    Keywords: Hybrid; Antrieb; Mobile Arbeitsmaschine; Elektrifizierung; Klimaneutrale Antriebe; Drive Technology; Mobile Machine; Electrification; Climate-neutral drives ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Self-Learning Longitudinal Control for On-Road Vehicles (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Reinforcement Learning is a promising tool to automate controller tuning. However, significant extensions are required for real-world applications to enable fast and robust learning. This work proposes several additions to the state of the art and proves their capability in a series of real world experiments.
    Keywords: Regelungstechnik; Künstliche Intelligenz; Fahrzeugregelung; Längsdynamik; Bestärkendes Lernen; Control Theory; Artificial Intelligence; Vehicle Control; Longitudinal Dynamics; Reinforcement Learning ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Abbildende Ellipsometrie mit Lichtwegumkehrung für die optische Charakterisierung von gekrümmten Oberflächen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Ellipsometry is a measuring method for surface characterization and thin-film measurement of flat surfaces using polarized light. However, a new measuring principle based on return-path ellipsometry and retroreflection enables the detection of free-form surfaces. This new measurement principle and related questions regarding the measurement function, evaluation algorithms and ambiguities as well as degrees of freedom of the solution set are examined in this work.
    Keywords: imaging; retroreflection; curved surface; ellipsometry; bildgebend; Retroreflexion; gekrümmte Oberfläche; Ellipsometrie; metrology; Messtechnik ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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    Entwicklung und Charakterisierung von Siliziumnitrid-/Siliziumkarbidkompositen für den Einsatz in tribologisch hochbeanspruchten Gleitsystemen (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this work, silicon nitride/silicon carbide composites are manufactured and characterized for tribologically highly stressed applications. The characterization of the composite materials shows the influence of the silicon carbide content on the resulting microstructure and the mechanical properties. The friction properties of the composite materials were characterized in tribological experiments. The composites show very good friction and wear behavior.
    Keywords: Siliziumnitrid ; Siliziumkarbid ; technische Keramik ; keramische Prozesstechnik ; Tribologie ; silicon nitride ; silicon carbide ; technical ceramics ; ceramic process technology ; tribology ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Modeling Backscattering Behavior of Vulnerable Road Users Based on High-Resolution Radar Measurements (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 evaluated in a virtual test environment by modeling its surrounding, specifically vulnerable road users (VRUs). Such a realistic model can be generated based on the radar cross section (RCS) and Doppler signatures of a VRU. Therefore, this work proposes a high-resolution RCS measurement technique to determine the relevant scattering points of different VRUs.
    Keywords: RCSmodeling of extended targets; range-Doppler; radar high-resolution measurement; Human body radar cross section (RCS) measurement; RCS-Modellierung von ausgedehnten Ziel; Entfernungs-Doppler; hochauflösende Radarmessung; Messung des Radarquerschnitts (RCS) des menschlichen Körpers ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Reservoir quality controls and reservoir modelling of continental to transitional shallow marine sedimentary basins of Southern Nigeria (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The object-based stochastic approach in facies modelling is important in the construction of geologically consistent 3-D reservoir models and in constraining the distribution of petrophysical properties. Tortuosity factor, facies, porosity and cementation factor constitute major uncertainties in the generated 3-D static model of the Niger Delta Basin. Reservoir quality in the Dahomey Basin is mainly controlled by detrital matrix, carbonate cement, and iron oxide and iron oxyhydroxide cements.
    Keywords: Petrographie; Diagenese; Reservoirqualität; Reservoirmodellierung; Dahomey- und Niger-Delta-Becken; Petrography; diagenesis; reservoir quality; reservoir modelling; Dahomey and Niger Delta Basins ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: English
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    Motion Planning for Autonomous Vehicles in Partially Observable Environments (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work develops a motion planner that compensates the deficiencies from perception modules by exploiting the reaction capabilities of a vehicle. The work analyzes present uncertainties and defines driving objectives together with constraints that ensure safety. The resulting problem is solved in real-time, in two distinct ways: first, with nonlinear optimization, and secondly, by framing it as a partially observable Markov decision process and approximating the solution with sampling.
    Keywords: Robotics; Planning under Uncertainty; Decision Making; Information Gathering; Motion Planning; Robotik; Automatisiertes Fahren; Planung unter Unsicherheiten; Entscheidungsfindung; Bewegungsplanung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building::TNK Building construction and materials
    Language: English
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    Representation of warm conveyor belts in sub-seasonal forecast models and the link to Atlantic-European weather regimes (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-04
    Description: 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 cycle of Atlantic-European weather regimes. The results emphasize the importance of accurate forecast of WCBs for sub-seasonal prediction on time scales beyond two weeks and tie the low forecast skill of blocked weather regimes over Europe to misrepresented WCBs.
    Keywords: numerische Wettervorhersage; synoptisch-skalige Prozesse; Warm conveyor belts; blockierende Hochdruckwetterlagen; sub-saisonale Zeitskalen; numerical weather prediction; synoptic-scale processes; warm conveyor belts; atmospheric blocking; sub-seasonal time scales ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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    Evaluating Architectural Safeguards for Uncertain AI Black-Box Components (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-04
    Description: Although tremendous progress has been made in Artificial Intelligence (AI), it entails new challenges. The growing complexity of learning tasks requires more complex AI components, which increasingly exhibit unreliable behaviour. In this book, we present a model-driven approach to model architectural safeguards for AI components and analyse their effect on the overall system reliability.
    Keywords: self-adaptive systems; safeguarding AI; architectural reliability analysis; Software engineering; Selbst-Adaptive Systeme; Absicherung von KI; architekturelle Zuverlässigkeitsanalyse; Softwaretechnik ; thema EDItEUR::P Mathematics and Science
    Language: English
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    Methode zur Bewertung der Zuverlässigkeit der elektrischen Energieversorgung in der automobilen Vorentwicklung (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: With the introduction of highly automated assistance systems in passenger cars, the requirements for the reliability of the electrical power supply increase significantly. In this thesis, a method for evaluating the reliability of the electrical power supply in automotive pre-development is presented and applied. As a result, it could be shown that the classical electrical power supply is not suitable for supplying highly automated assistance systems.
    Keywords: pre-development; Vorentwicklung; energy supply; Reliability; Zuverlässigkeit; Energieversorgung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Verbinder aus Kunstharzpressholz mit erhöhter Reibung in der Scherfuge (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: For the first time new connectors were realized using densified veneer wood (DVW). Initially, the DVW surface was modified to increase the friction between the connector and the timber part in the shear plane and thus significantly increase the load-carrying capacity of the connection. Friction tests were carried out to determine the friction coefficients of the surfaces. Based on the friction tests, the behavior of the surfaces in combination with inclined screws was investigated.
    Keywords: Systemverbinder; HT-NT-Verbinder; Kunstharzpressholz; Reibung; Reibbeiwert; system connector; beam to beam connector; densified veneer wood; friction; coefficient of friction ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: German
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    Integrated optical sensors on the Si₃N₄-organic hybrid (SiNOH) platform (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: A waveguide-based sensor chip is demonstrated that is suitable for point-of-care applications. The biosensor is designed using a mathematical model to investigate the sensitivity of the waveguides. A new class of integrated laser sources for visible wavelengths is being investigated for the first time for light coupling into the waveguides. The functionality of the waveguide-based biosensor chip is successfully demonstrated by detection experiments.
    Keywords: Sensorik; integrierte Laser; organische Laser; photonische Wellenleiter; patientennahe Labordiagnostik; Sensors; integrated lasers; organnic lasers; photonic waveguides; point-of-care diagnostics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Ein produktorientiertes Verrechnungssystem für Leistungen des Facility Management im Krankenhaus (2023)
    KIT Scientific Publishing
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    Publication Date: 2023-07-05
    Description: Das vorliegende Werk liefert mit dem produktorientierten Ansatz eine leicht nachvollziehbare Methode, die Bedürfnisse der Mitarbeiter im Krankenhaus an ihre Arbeitsumgebung in messbare Liefereinheiten zu überführen. Über das produktorientierte Verrechnungssystem wird das Kunden-Liefe-ranten-Verhältnis in selbstregulierende geschlossene Regelkreise überführt. Dies führt zu einer Steigerung der Effizienz und liefert damit einen wert-vollen Beitrag zu Einsparungen im Gesundheitswesen. Auf Basis des Modells können Leistungen und Kosten des FM für jedes Krankenhaus prognostiziert und verglichen werden.
    Keywords: TA1-2040 ; Krankenhaus ; Verrechnungssystem ; Gesundheitswesen ; bic Book Industry Communication::M Medicine::MB Medicine: general issues
    Language: German
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    Fiber Orientation Tensors and Mean Field Homogenization (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-11
    Description: 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 fourth-order using irreducible tensors and material symmetry. The case of planar fiber orientation tensors, relevant for sheet molding compound, is presented completely. Consequences for the reconstruction of fiber distributions and mean field homogenization are presented.
    Keywords: Faserorientierungstensor; Mikrostruktur; Homogenisierung; Anisotropie; Elastizität; Fiber orientation tensor; Fiber-reinforced composites; Mean field homogenization; Anisotropy; Elasticity ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: English
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    Einflusswirkungen auf das Geschäftsmodell Carsharing – unter Berücksichtigung des Stakeholder-Ansatzes (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-05
    Description: Carsharing kann wesentlich zur Reduzierung privater PKW beitragen. Dennoch verharrt es in der Nische. Die vorliegende Arbeit sucht nach den Gründen des Nischendaseins und dies mit Fokus auf unterschiedliche Stakeholdergruppen. Neben der Darstellung der Einflusswirkungen sowie deren Einordnung und Auswertung auf der Grundlage des Stakeholder Salience Modell von Mitchell et al. gibt der Autor Handlungsempfehlungen, wie es zu einer Ausweitung des Carsharing in Deutschland kommen kann. Car sharing can contribute significantly to reducing the number of private cars. Nevertheless, it remains in the niche. This work looks for the reasons for this niche existence and does so with a focus on different stakeholder groups. In addition to the presentation of the effects of influence as well as their classification and evaluation on the basis of the Stakeholder Salience Model by Mitchell et al., the author gives recommendations for action on how an expansion of car sharing in Germany can be achieved.
    Keywords: Carsharing ; nachhaltige Mobilität ; Stakeholder-Ansatz ; Stakeholder Salience Model ; Stakeholder-Beziehungen ; car sharing ; sustainable mobility ; Stakeholder approach ; Stakeholder salience model ; Stakeholder relationships ; thema EDItEUR::N History and Archaeology::NH History
    Language: German
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    Multimodal Panoptic Segmentation of 3D Point Clouds (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-14
    Description: The understanding and interpretation of complex 3D environments is a key challenge of autonomous driving. Lidar sensors and their recorded point clouds are particularly interesting for this challenge since they provide accurate 3D information about the environment. This work presents a multimodal approach based on deep learning for panoptic segmentation of 3D point clouds. It builds upon and combines the three key aspects multi view architecture, temporal feature fusion, and deep sensor fusion.
    Keywords: Temporal Fusion; Sensor Fusion; Semantic Segmentation; Panoptic Segmentation; Zeitliche Fusion; Semantische Segmentierung; Panoptische Segmentierung; Sensorfusion; Deep Learning ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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    Vertrauen in Roboter und dessen Beeinflussbarkeit durch sprachliches Framing (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-01
    Description: 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 and fears of technological replacement affect trust formation. They can be influenced by linguistic framing, as this interdisciplinary empirical study shows.
    Keywords: Mensch-Roboter-Interaktion; Kollaborierende Roboter; Vertrauen; Anthropomorphismus; Sprachliches Framing; Human-robot interaction; Collaborative robots; Trust; Anthropomorphism; Linguistic framing ; thema EDItEUR::N History and Archaeology::NH History
    Language: German
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    Entwicklung keramischer Vergussmassen mit Alkoxysilanen zur Steigerung der Haftfestigkeit (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 invented, that enabled high shear strengths even at high temperatures for short times. Furthermore, a completely new potting material was invented on the basis of alkoxysilanes. Especially MTES showed beneficial properties for the adhesion under temperature load.
    Keywords: Vergussmasse; Scherfestigkeit; Primer; Alkoxysilan; Leistungselektronik; Potting Material; Shear Strength; Alkoxysilane; Power Electronics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Multi-field modeling and simulation of fiber-reinforced polymers (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 behavior of the polymeric matrix and the embedded fibers separately, and includes a modified plasticity model that considers the temperature-dependent growth of voids. Tests are conducted to explore different types and sequences of failure in long fiber-reinforced polymers.
    Keywords: duktiler Bruch ; faserverstärkte Materialien ; Verbundwerkstoff ; Phasenfeld ; Plastizität ; ductile fracture ; fiber-reinforced materials ; composite ; phase-field ; plasticity ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
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    A hydrodynamical perspective on the turbulent transport of bacteria in rivers (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The transport of bacteria in turbulent river-like environments is addressed, where bacterial populations are frequently encountered attached to solids. This transport mode is investigated by studying the transient settling of heavy particles in turbulent channel flows featuring sediment beds. A numerical method is used to fully resolve turbulence and finite-size particles, which enables the assessment of the complex interplay between flow structures, suspended solids and river sediment.
    Keywords: Aquatic pollution ; Exact coherent structures ; Particle-laden flows ; Gewässerverschmutzung ; Exakte kohärente Strukturen ; Partikelströmungen ; Turbulence ; Sedimentation ; Turbulenz ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
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    Quantum Tunneling of Josephson Vortices in High-Impedance Long Junctions (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-04
    Description: In the last decades, superconducting devices have emerged as a promising platform for quantum technologies, including quantum sensing and quantum computing. Their key elements are Josephson junctions, which allow for coherent supercurrent tunneling between two weakly linked superconductors. If such a junction is extended in one direction to a long junction, the superconducting phase difference can vary in space and time and may allow for quantized phase windings that drive supercurrent vortices.
    Keywords: Josephson vortex ; Long Josephson junction ; Josephson effect ; Fluxon ; Josephson Vortex ; Langer Josephson Kontakt ; Josephson Effekt ; Quantum bit ; Qubit ; Quantenbit ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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    Indirekte Schätzung des Fahrbahnnässegrads zur Detektion von gefährlichen Fahrzuständen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: An estimation of the road wetness level supports the driver as well as the vehicle to maneuver safely. This study presents the fundamentals of a system that uses structure-borne sound measurements at various positions on the vehicle to detect the water spraying up from the tires and uses this information to estimate the degree of road wetness. The system finds its first application in the Porsche 911, Type 992.
    Keywords: Fahrbahnnässe; Fahrzeugsicherheit; Wasseraufwirbelung; Road wetness; Vehicle safety; Tire splash and spray ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    EAS Elements for Solid Mechanics (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 previous publications on that method and covers recent improvements for EAS elements. In particular, we describe three key issues of standard EAS elements and develop corresponding solutions.
    Keywords: enhanced assumed strain (EAS); mixed integration point; Petrov-Galerkin; Netzverzerrungsempfindlichkeit; Hourglass-Instabilitäten; mesh distortion sensitivity; hourglassing-instabilities ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: English
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    Entwicklung und Evaluierung einer Kommunikationsgestützten Lokalisierung (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The content of this work is the development of a localization system, which enables several driverless transport vehicles to navigate locally in a highly flexible and free way. The ceiling mounted sensor system detects and analyzes objects within the field of view. The detected properties of all objects are made available via an interface and enable vehicles to identify themselves and navigate freely without a sensor mounted on the vehicle.
    Keywords: Lokalisierung; fahrerlose Transportfahrzeuge; 3D-Kamera; Objekterkennung; Kommunikation; Localization; automated guided vehicles; 3D camera; object recognition; communication ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Strengthening Resilience of Supply with Essential Goods through Public-Private Emergency Collaborations (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-02-06
    Description: 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 crisis management from the perspective of different stakeholders. It shows the potential of collaborative approaches, addressing the strengths and incentives of stakeholders accordingly.
    Keywords: incentives; collaboration; humanitarian logistics; public-private partnership; crisis management; Anreize; Kollaboration; Humanitäre Logistik; Öffentlich-Private Partnerschaft; Krisenmanagement ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics
    Language: English
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    In Situ Characterization and Modelling of Drying Dynamics for Scalable Printing of Hybrid Perovskite Photovoltaics (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 laminar and slot-jet air flows are investigated extensively by optical in situ characterization. The main results are a quantitative model of perovskite drying dynamics and a novel in situ imaging technique – yielding valuable predictions for large-scale perovskite fabrication.
    Keywords: Hybrid perovskite ; in situ characterization ; drying dynamics ; photoluminescence imaging ; up-scaling ; Hybride Perowskite ; In-Situ Charakterisierung ; Trocknungsdynamik ; Photolumineszenz-Bildgebung ; Hochskalierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Anomaliedetektion in räumlich-zeitlichen Datensätzen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Human support in surveillance tasks is crucial due to the overwhelming amount of sensor data. This work focuses on the development of data fusion methods using the maritime domain as an example. Various anomalies are investigated, evaluated using real vessel traffic data and tested with experts. For this purpose, situations of interest and anomalies are modelled and evaluated based on different machine learning methods.
    Keywords: spatio-temporal data; situation analysis; anomaly detection; räumlich-zeitliche Daten; Maritime Überwachung; Anomaliedetektion; maritime surveillance; Situationsanalyse; machine learning; Maschinelles Lernen ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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    Über die Formalisierung und Analyse medizinischer Prozesse im Kontext von Expertenwissen und künstlicher Intelligenz (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Digitalization has already transformed many areas of the economy and social life. Aspects of healthcare and clinical practice are also undergoing digital transformation. In light of these developments, this dissertation sheds light on the acquisition, representation, and use of process knowledge in the context of hybrid AI methods. The central contribution is the structure-preserving back-and-forth transformation of process trees to process plans.
    Keywords: KI ; Expertenwissen ; Formalisierung ; Prozess ; Transformation ; AI ; Expert knowledge ; formalization ; process ; transformation ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: German
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    Numerische Modellierung und Simulation von bleifreien Relaxor-Ferroelektrikum-Kompositen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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, a fully coupled, three dimensional ferroelectric constitutive model is developed. In a parameter study, the electromechanical coupling of bilayer composite is optimized.
    Keywords: Finite-Elemente-Simulation ; Piezoelektrizität ; Ferroelektrizität ; bleifreie Ferroelektrika ; Piezoelectricity ; Ferroelectricity ; Lead-Free Ferroelectrics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Hybrid photonic assemblies based on 3D-printed coupling structures (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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. Additive micro-fabrication of free-form optical coupling structures is discussed as a concept to overcome this technology gap. Multi-photon 3D-lithography is used to fabricate dielectric waveguides ("photonic wire bonds", PWB) as well as facet-attached microlenses (FaML).
    Keywords: Photonische Aufbau- und Verbindungstechnik; integrierte photonische Schaltkreise; Multiphotonenlithographie; additive 3D Mikrofabrikation; Mikrooptik; photonic packaging; photonic integrated circuits (PIC); multi-photon lithographie; additive 3D micro-fabrication; micro-optics ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    380 kV Superconducting Fault Current Limiter Feasibility Study (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this study the technical and economic feasibility of a 380 kV, 5 kA resistive type superconducting fault current limiter was investigated. Conceptual designs were developed with superconducting tapes cooled by liquid nitrogen and arranged in bifilar coils. A cryostat was designed using FEM simulations taking into account the non-linear voltage distribution. For the complete system including current limiting reactors and cooling system, the investment and operation costs were calculated.
    Keywords: economic feasibility; bifilar coil; high voltage; superconducting fault current limiter; superconductor; wirtschaftliche Machbarkeit; bifilare Spule; Hochspannung; supraleitender Strombegrenzer; Supraleiter ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
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    Überwachte Methoden für die spektrale Entmischung mit künstlichen neuronalen Netzen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: In this work, artificial neural networks trained in a supervised manner for spectral unmixing are investigated. For this purpose, a suitable network architecture is determined first. After that, the focus lies on the generation of suitable training data. Model-based methods that generate training data from real pure spectra and data-based methods that augment existing training data are presented and evaluated.
    Keywords: data generation; data augmentation; supervised training; artificial neural network; hyperspectral image; Datenerzeugung; Datenaugmentierung; überwachtes Training; Hyperspektralbild; künstliche neuronale Netze ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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    Systematic Approaches to Advanced Information Flow Analysis – and Applications to Software Security (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: I report on applications of slicing and program dependence graphs (PDGs) to software security. Moreover, I propose a framework that generalizes both data-flow analysis on control-flow graphs and slicing on PDGs. This framework can be used to systematically derive data-flow-like analyses on PDGs that go beyond slicing. I demonstrate that data-flow analysis can be systematically applied to PDGs and show the practicability of my approach.
    Keywords: Programmabhängigkeitsgraphen; Slicing; Informationsflusskontrolle; Datenflussanalyse; Kontrollflussgraphen; program dependence graphs; slicing; information flow control data-flow analysis; control-flow graphs ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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    Kursbuch Informatik I. Formale Grundlagen der Informatik und Programmierkonzepte am Beispiel von Java. Eine Einführung in die Informatik auf der Grundlage etablierter Lehrbücher (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Das modular aufgebaute Kursbuch Informatik I behandelt die wichtigsten theoretischen Grundlagen der Informatik. Außerdem werden praktische Fähigkeiten vermittelt, die zur selbstständigen Erstellung von gut geschriebenen (Java-) Programmen erforderlich sind.
    Keywords: QA75.5-76.95 ; Programmiersprache ; Theoretische Informatik ; Formale Sprache ; Informatikstudium ; Informatiklehrer ; Programmierung ; thema EDItEUR::U Computing and Information Technology::UB Information technology: general topics
    Language: German
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    Deep Reinforcement Learning zur Steigerung von Energieeffizienz und Pünktlichkeit von Straßenbahnen (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 those of drivers from regular passenger operation as well as with a theoretical optimum determined by Dynamic Programming. In addition, transfer learning capabilities of the AI will be investigated.
    Keywords: Straßenbahn; KI; Energie; effizienz; Pünktlichkeit; Modellierung; Light Rail; AI; Energy Efficiency; Punctuality; Modelling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Sustainable phosphate management (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-01
    Description: Phosphorus is a crucial element in agriculture to feed the fast-growing global population. Its sustainable supply has ecological, social and human dimensions and it is classified as critical to European industries. On the other side, phosphate can also be critical for the producing countries as phosphate mining contributes to their national economies. This work investigates implications of environmental and social impacts and the resource governance to mitigate global phosphate criticality.
    Keywords: Phosphatabbau; Phosphatgewinnung; Nachhaltigkeit; Lebenszyklusanalyse; Kritikalitätsanalyse; Phosphate mining; Sustainability; Lifecycle assessment; Criticality Analysis ; thema EDItEUR::N History and Archaeology::NH History
    Language: English
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    New Type of sub-THz Oscillator and Amplifier Systems Based on Helical-Type Gyro-TWTs (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work presents the development of a new sub-THz source for the generation of trains of coherent high-power ultra-short pulses at 263 GHz via passive mode-locking of two coupled helical gyro-TWTs. For the first time, it is shown that the operation of such passive mode-locked helical gyro-TWTs in the hard excitation regime is of particular importance to reach the optimal coherency of the generated pulses. This could be of particular interest for some new time-domain DNP-NMR methods.
    Keywords: passive Modenkopplung; Sub-THz; Gyro-TWT; Ultrakurze Pulse; passive mode-locking; sub-THz; gyro-TWT; ultra-short pulses ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Architectural Alignment of Access Control Requirements Extracted from Business Processes (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Business processes and information systems evolve constantly and affect each other in non-trivial ways. Aligning security requirements between both is a challenging task. This work presents an automated approach to extract access control requirements from business processes with the purpose of transforming them into a) access permissions for role-based access control and b) architectural data flow constraints to identify violations of access control in enterprise application architectures.
    Keywords: Software Engineering; Enterprise Architecture; Zugriffskontrolle; Geschäftsprozesse; Access Control; Business Processes ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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    Local Probing of a Superconductor’s Quasiparticles and Bosonic Excitations with a Scanning Tunnelling Microscope (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-08
    Description: 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 (STM) allow measurements at millikelvin temperatures with unprecedented energy resolution. Therefore, this instrument excels in probing the superconducting state at low temperatures and especially its local quasiparticle excitations as well as bosonic degrees of freedom.
    Keywords: Supraleitung ; Rastertunnelspektroskopie ; Granulare Supraleiter ; Vortices ; Unkonventionelle Supraleitung ; Superconductivity ; Scanning Tunnelling Spectroscopy ; Granular Superconductors ; Unconventional Superconductivity ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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    Technology and readout for scaling up superconducting nanowire single-photon detectors (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 frequency-multiplexing scheme to operate multiple detectors with a reduced number of lines, and the integration of SNSPDs with free-form polymer structures to achieve efficient optical coupling onto the active area of the detectors.
    Keywords: SNSPD; Einzelphotonendetektor; Supraleitung; Atomlagenabscheidung; single-photon detector; superconductivity; thin-film technology; frequency-division multiplexing; optical integration ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Thermische Untersuchungen an Laser-aktivierten Leuchtstoff-Systemen mit dynamischer Leuchtdichteverteilung (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-16
    Description: The simulation of ceramic phosphors by means of the diffusion approximation of the radiation transport equation is extended from rotationally symmetrical cases to general, three-dimensional problems. The phosphor is simulated with the diffusion approximation for a temporal and spacial variable laser light source for the first time. Therefore, different laser light sources are being compared to evaluate, which one of the alternatives is best suited for the intended use in an automotive head lamp.
    Keywords: Laser ; Scheinwerfer ; Adaptiv ; Dynamisch ; Diffusionsnäherung ; head light ; adaptive ; dynamic ; diffusion approximation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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    Multiscale Cohort Modeling of Atrial Electrophysiology (2023)
    KIT Scientific Publishing
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    Publication Date: 2023-05-03
    Description: 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 simulation can be a valuable data resource for improving automated atrial fibrillation risk stratification with machine learning techniques and thus, reduces the risk of stroke in affected patients.
    Keywords: Electrophysiologische Modellierung und Simulation; Elektrokardiogramm; Maschinelles Lernen; Vorhofflimmern; Statistisches Shape Modell; electrophysiological modeling and simulation; electrocardiogram; machine learning; atrial fibrillation; statistical shape model ; bic Book Industry Communication::T Technology, engineering, agriculture::TH Energy technology & engineering::THR Electrical engineering
    Language: English
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    Die Baugeschichte des Freiburger Münsterturms (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-03-23
    Description: The Freiburg Minster spire viewed from the perspective of archaeological building research. Individual building phases of the tower are presented by means of collecting and analysing thousands of stonemason's marks appearing on the tower in multiple perspective illustrations. The three-dimensional reconstruction of the design drawing of a more than 700-year-old vellum plan vividly demonstrates that many ideas of the complex Gothic tower construction were already present in the planning.
    Keywords: Freiburger Münster; Gotik; Bauforschung; Mittelalterliche Baurisse; Maßwerkhelm; Freiburg Minster; Gothic; Building research; Medieval construction plans; Spire ; thema EDItEUR::A The Arts::AM Architecture
    Language: German
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    Das „friedliche Atom“ als Narrativ in Politik, Wissenschaft und Design (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-03-23
    Description: 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 architect and graphic designer Rolf Lederbogen as an example, the socio-political dimension of nuclear technology in communication and visualisation of the narrative "Atoms for Peace" is put in context with the history of technical thinking in architecture and design.
    Keywords: Technikästhetik; „friedliches Atom“; Strategien des Sichtbarmachens; Atombilder; Nachkriegsmoderne; atomic culture; „Atoms for Peace“; strategies of visualisation; nuclear images; post-war modernism ; thema EDItEUR::A The Arts::AM Architecture
    Language: German
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    Development of a modular Knowledge-Discovery Framework based on Machine Learning (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 exploit the investigated design spaces based on a limited number of observations, discovering and visualizing connections and correlations in complex phenomena. The extracted knowledge is then validated with domain expertise, revealing potential and limitations of this method.
    Keywords: Gasoline Direct Injection; Data-Driven Development; Machine Learning Application; Datengetriebene Entwicklung; Anwendung des Maschinellen Lernens; Knowledge Discovery; Benzin-Direkteinspritzung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    OCM 2023 (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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, driven by new applications and innovative sensor technologies that are constantly evolving.The great success of past conferences proves the necessity of a platform for presentation, discussion and evaluation of the latest research results in this interdisciplinary field.
    Keywords: Charakterisierung von Materialien; Hyperspektral; multispektrale Bildanalyse; Röntgenmethoden; Recycling; characterisation of materials; hyperspectral; multispectral image analysis; X-ray methods; recycling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: English
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    Entwicklung einer Methode zum Einsatz von Reinforcement Learning für die dynamische Fertigungsdurchlaufsteuerung (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 validated on a theoretical and a real scheduling case.
    Keywords: Produktionssteuerung; Reinforcement Learning; Künstliche Intelligenz; Terminierung; Production control; artificial intelligence; scheduling ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Molecular Motor Based on Single Chiral Tripodal Molecules Studied with STM (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-04
    Description: This work presents a single molecular motor driven by the current in an STM. Its chiral functional group is supposed to perform a rotation in a preferred direction, proven by Binomial tests to be statistically significant. The rotation is proposedly driven by the chiral-induced spin selectivity effect (CISS). However, the studies of the rotation on the dependence on the lateral tip position, voltage and current indicate that he CISS is unlikely to cause the preferred rotation direction.
    Keywords: Nano Machines ; Molecular Motors ; Conductive Atomic Force Microscopy ; Molecular Electronics ; Nanomaschinen ; Molekulare Motoren ; Leitfähige Rasterkraftmikroskopie ; Molekulare Elektronik ; Scanning Tunneling Microscopy ; Rastertunnelmikroskopie ; thema EDItEUR::P Mathematics and Science::PH Physics
    Language: English
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    Örtliches Auslegungskonzept gegen Pittingversagen bei randschichtgehärteten Zahnrädern (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: The current design of gears against pitting fatigue is based on simple physical models in combination with empirically determined factors. In contrast to that, this work presents a new design concept against pitting fatigue which is based on local quantities and allows a more detailed consideration of different influence parameters on the expected pitting life.
    Keywords: Pitting; Grübchenbildung; Zahnradermüdung; Zahnradberechnung; örtliches Auslegungskonzept; gear fatigue; gear design; local fatigue concept ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: German
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    Decentralized Scheduling of Discrete Production Systems with Limited Buffers (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: Modern production systems have become more flexible and agile. For them, a suitable control and planning method is needed. Agent-based systems offer the required characteristics. The contributions of these work are a remodeling of the Shifting Bottleneck heuristic to include limited buffers, the development of a decentralized multi-agent system for production planning, and the adaptation of the heuristic to the agent system. It concludes with evaluations of real-world production systems.
    Keywords: Produktionsplanung; Dezentral; Limitierte Puffer; Ablaufplanung; Multi-Agenten-System; Production Planning; Decentral; Limited Buffer; Scheduling; Multi-Agent System ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    Fast Dense Depth Estimation from UAV-borne Aerial Imagery for the Assistance of Emergency Forces (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work addresses the use of commercial off-the-shelf rotor-based unmanned aerial vehicles (UAVs) to facilitate emergency forces in the rapid structural assessment of a disaster site by means of aerial image-based reconnaissance. It proposes a framework that consists of two parts and relies on the integrated stereo vision sensor and the visual payload camera of the UAV to execute three high-level applications that aim at facilitating first responders in disaster relief missions.
    Keywords: Luftbildauswertung; Unbemannte Luftfahrzeuge; Umfelderfassung; 3D-Kartierung; Katastrophenhilfe; Aerial Reconnaissance; Unmanned Aerial Vehicles; Environment Perception; 3D Mapping; Disaster Relief ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TN Civil engineering, surveying and building
    Language: English
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    Bewertung der Ökologie, Wirtschaftlichkeit und sozialen Effekte von ressourceneffizienzsteigernden Maßnahmen auf Quartiersebene – von der volkswirtschaftlichen zur akteursspezifischen Perspektive (NaMaRes): Schlussbericht des Forschungsvorhabens (2023)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-02-06
    Description: 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. The project's results enhance the information available on resources in existing neighborhoods and provide a foundation for stakeholders in political discussions and urban implementation planning. The project contributes to the implementation of the SDGs in cities.
    Keywords: Klimaanpassung; Stadtforschung; Ressourceneffizienz; Integrierter Planungs- und Transformationsprozess; Stadtentwicklung; Climate adaptation; Urban research; Resource efficiency; Integrated planning and transformation process; Urban development ; bic Book Industry Communication::K Economics, finance, business & management::KC Economics
    Language: German
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    Measurable Safety of Automated Driving Functions in Commercial Motor Vehicles (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: With the further development of automated driving, the functional performance increases resulting in the need for new and comprehensive testing concepts. This doctoral work aims to enable the transition from quantitative mileage to qualitative test coverage by aggregating the results of both knowledge-based and data-driven test platforms. The validity of the test domain can be extended cost-effectively throughout the software development process to achieve meaningful test termination criteria.
    Keywords: automatisiertes Fahren; Nutzfahrzeuge; Testmethoden; Stichprobenverfahren; messbare Sicherheitsvorhersage; automated driving; commercial motor vehicles; test methods; sampling methods; measurable safety prediction ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    On the Influence of Piecewise Defined Contact Geometries on Friction Dampers (2023)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: This work considers dampers that do not solely focus on a single strategy but instead combine them. The capabilities of conventional dry friction dampers are expanded by taking into account piecewise defined contact geometries. This leads to friction dampers that change their behavior depending on the amplitude of the oscillations. The vibration damping device in this work, introduces damping at high oscillation amplitudes and takes advantage of absorption at low oscillation amplitudes.
    Keywords: semi-active systems ; averaging methods ; friction dampers ; semi-aktive Systeme ; Mittelwertbildung ; Reibungsdämpfer ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TG Mechanical engineering and materials
    Language: English
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    Spannungseinprägende aktive Filter zur Kompensation der Stromverzerrungen von Netzstromrichtern (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-11
    Description: 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 to accomplish this task with low control bandwith, low passive filtering effort, and high efficiency with only a small increase in installed semiconductor power.
    Keywords: Aktive Filter; Stromrichter; Harmonische Oberschwingungen; Kompensation von stromrichterbedingten Oberschwingungen; Filter für Netzstromrichter; Active Filters; Power Converters; Harmonics; Mitigation of Converter-Induced Harmonics; Filters for Grid-Connected Power Converters ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TH Energy technology and engineering::THR Electrical engineering
    Language: German
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    Self-learning Anomaly Detection in Industrial Production (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: 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 challenging. Within the research work, different self-learning frameworks to analyze passively captured network traces from PROFINET-based industrial system for protocol-based and process behavior-based anomaly detection are developed, and evaluated on a real-world industrial system.
    Keywords: Industrielles Steuerungssystem; Netzwerksicherheit; Netzwerk-Intrusion-Detection-System; Anomalieerkennung; selbstlernend; Industrial Control System; Network Security; Network Intrusion Detection System; Anomaly Detection; self-learning ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
    Language: English
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