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  • Books  (778)
  • T1-995  (739)
  • thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists  (36)
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  • KIT Scientific Publishing  (778)
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  • Books  (778)
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  • 1
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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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  • 2
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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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  • 3
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    A Reference Structure for Modular Model-based Analyses (2024)
    KIT Scientific Publishing
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    Publication Date: 2024-05-09
    Description: In this work, the authors analysed the co-dependency between models and analyses, particularly the structure and interdependence of artefacts and the feature-based decomposition and composition of model-based analyses. Their goal is to improve the maintainability of model-based analyses. They have investigated the co-dependency of Domain-specific Modelling Languages (DSMLs) and model-based analyses regarding evolvability, understandability, and reusability.
    Keywords: Domain-specific modeling languages; Software Architecture; Internal software quality; Domänenspezifische Modellierungssprachen; Software Architektur; Interne Software Qualität ; 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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  • 4
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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
    Details
    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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  • 5
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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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  • 6
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    Abbildende Ellipsometrie mit Lichtwegumkehrung für die optische Charakterisierung von gekrümmten Oberflächen (2023)
    KIT Scientific Publishing
    Details
    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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  • 7
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    Multimodal Panoptic Segmentation of 3D Point Clouds (2023)
    KIT Scientific Publishing
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    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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  • 8
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    Anomaliedetektion in räumlich-zeitlichen Datensätzen (2023)
    KIT Scientific Publishing
    Details
    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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  • 9
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    Systematic Approaches to Advanced Information Flow Analysis – and Applications to Software Security (2023)
    KIT Scientific Publishing
    Details
    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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  • 10
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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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  • 11
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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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  • 12
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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: 2024-05-13
    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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  • 13
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    Proceedings of the 2022 Joint Workshop of Fraunhofer IOSB and Institute for Anthropomatics, Vision and Fusion Laboratory (2023)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: In August 2022, Fraunhofer IOSB and IES of KIT held a joint workshop in a Schwarzwaldhaus near Triberg. Doctoral students presented research reports and discussed various topics like computer vision, optical metrology, network security, usage control, and machine learning. This book compiles the workshop's results and ideas, offering a comprehensive overview of the research program of IES and Fraunhofer IOSB.
    Keywords: optical metrology; computer vision; Optische Messtechnik; Bildverarbeitung; usage control; network security; machine learning; Usage Control; Netzwerksicherheit; Maschinelles Lernen ; 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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  • 14
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    Deep Learning based Vehicle Detection in Aerial Imagery (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: This book proposes a novel deep learning based detection method, focusing on vehicle detection in aerial imagery recorded in top view. The base detection framework is extended by two novel components to improve the detection accuracy by enhancing the contextual and semantical content of the employed feature representation. To reduce the inference time, a lightweight CNN architecture is proposed as base architecture and a novel module that restricts the search area is introduced.
    Keywords: Objektdetektion ; Neuronale Netze ; Luftbilddaten ; Object Detection ; Deep Learning ; Aerial Imagery ; 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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  • 15
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    Proceedings of the 2021 Joint Workshop of Fraunhofer IOSB and Institute for Anthropomatics, Vision and Fusion Laboratory (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: 2021, the annual joint workshop of the Fraunhofer IOSB and KIT IES was hosted at the IOSB in Karlsruhe. For a week from the 2nd to the 6th July the doctoral students extensive reports on the status of their research. The results and ideas presented at the workshop are collected in this book in the form of detailed technical reports.
    Keywords: computer vision; optische Messtechnik; network security; usage control und machine learning; optical metrology; usage control and machine 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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  • 16
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    QoS-Based Optimization of Runtime Management of Sensing Cloud Applications (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: IoT applications perceive and interact with the environment via smart devices and cloud services. When operating such applications one is faced with the challenge of configuring the smart devices and the cloud services in a manner, which achieves a high data quality at low operational costs. This work supports IoT operators with IoT collection strategies and cost optimization functions for data qualities, which are influenced by the interplay of smart device and cloud service configurations.
    Keywords: Internet-of-Things (IoT); Cloud Computing; Lastkontrolle; Flow Control ; thema EDItEUR::U Computing and Information Technology::UY Computer science::UYA Mathematical theory of computation::UYAM Maths for computer scientists
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  • 17
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    Model-Based Performance Prediction for Concurrent Software on Multicore Architectures (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Model-based performance prediction is a well-known concept to ensure the quality of software.Current approaches are based on a single-metric model, which leads to inaccurate predictions for modern architectures. This thesis presents a multi-strategies approach to extend performance prediction models to support multicore architectures.We implemented the strategies into Palladio and significantly increased the performance prediction power.
    Keywords: Modellbasierte Performancevorhersage; Software Engineering; Multicore-Architekturen; parallele Entwurfsmuster; Model-based Performance Prediction; Multicore architectures; Parallel Design Patterns ; 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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  • 18
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    Adaptive Umweltmodellierung für kognitive Systeme in offener Welt durch dynamische Konzepte und quantitative Modellbewertung (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: In this work, an approach for adaptive world modeling is proposed. World models for cognitive systems often employ predefined domain models, which may become insufficient when encountering unforeseen entities. The presented approach addresses an adaptive extension of such domain models, considering the relevance of proposed model adaptations. As a basis, a quantitative model evaluation is devised, rating the ability of a domain model to represent the currently observed environment state.
    Keywords: Umweltmodellierung ; quantitative Modellbewertung ; probabilistische Informationsverarbeitung ; Konzeptlernen ; kognitive Systeme ; world modeling ; quantitative model evaluation ; concept learning ; probabilistic information processing ; cognitive systems ; 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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  • 19
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    Automatisierte, minimalinvasive Sicherheitsanalyse und Vorfallreaktion für industrielle Systeme (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Automated defense and prevention measures designed to protect industrial automation and control systems often compromise their real-time processing, resilience and redundancy. Therefore, they need to be performed as non-invasively as possible. Nevertheless, particularly minimally invasive security analysis and incident response are still poorly researched. This work presents solutions based on new semantic- and SDN-based approaches to some of the most important problems in these areas.
    Keywords: Sicherheitsanalyse; Ontologie; Software-defined Networking; Incident Response; Industrial Automation and Control Systems; security analysis; semantic web; ontology; software-defined networking; incident response; industrial automation and control systems ; 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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  • 20
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    Application of diffractive lens arrays in confocal microscopy (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Diffractive lens arrays are proposed in this work for application in reflected-light confocal microscopes. They have overcome the limitations between fields of view and resolution of traditional objectives. Experiments of multi-spot confocal imaging in surface metrology and fluorescence microscopy have been demonstrated based on the proposed concepts, which have shown capabilities of high-resolution measurement over a large area.
    Keywords: diffraktives optisches Element; Konfokalmikroskopie; Fluoreszenzmikroskopie; Metrologie; 3D Messtechnik; diffractive optical element; confocal microscopy; fluorescence microscopy; metrology; 3D measurement technology ; 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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  • 21
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    Anonymous Point Collection - Improved Models and Security Definitions (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: This work is a comprehensive, formal treatment of anonymous point collection. The proposed definition does not only provide a strong notion of security and privacy, but also covers features which are important for practical use. An efficient realization is presented and proven to fulfill the proposed definition. The resulting building block is the first one that allows for anonymous two-way transactions, has semi-offline capabilities, yields constant storage size, and is provably secure.
    Keywords: Anonymität ; Loyalitätssysteme ; Reputation Systems ; Loyalty Systems ; Payment Systems ; Privacy ; Reputationssysteme ; Bezahlsysteme ; 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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  • 22
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    Eine agentenbasierte Architektur für Programmierung mit gesprochener Sprache (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: The system described in this work, called ProNat, makes end-user programming with spoken language possible. It enables non-experts to describe programs for different target systems and to extend their functionality using everyday language. ProNat is based on PARSE, a specially designed agent-based framework architecture. In three independent studies, ProNat has proven to be principally capable of synthesizing programs from spoken utterances.
    Keywords: Computerlinguistik; Künstliche Intelligenz; Programmsynthese; Endnutzer-Programmierung; Softwaretechnik; Natural Language Processing; Artificial Intelligence; Program Synthesis; End-user Programming; Software Engineering ; 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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  • 23
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    Interaktionstechniken für mobile Augmented-Reality-Anwendungen basierend auf Blick- und Handbewegungen (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Intuitive interaction techniques are essential for mobile augmented reality systems. For implicit interaction, this work presents techniques for automatic eye movement analysis and visualization. In the context of explicit interaction, a fusion of optical flow, skin color segmentation, and a hand pose estimator is presented along with a tracking method for localization and pose estimation of a hand in monocular color images.
    Keywords: Mensch-Maschine-Interaktion; Blickanalyse; Hand-Tracking; Handpose; Augmented Reality; human computer interaction; gaze analysis; hand tracking; hand pose; augmented reality ; 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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  • 24
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    Probabilistic Parametric Curves for Sequence Modeling (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: This work proposes a probabilistic extension to Bézier curves as a basis for effectively modeling stochastic processes with a bounded index set. The proposed stochastic process model is based on Mixture Density Networks and Bézier curves with Gaussian random variables as control points. A key advantage of this model is given by the ability to generate multi-mode predictions in a single inference step, thus avoiding the need for Monte Carlo simulation.
    Keywords: Probabilistische Sequenzmodellierung ; Stochastische Prozesse ; Neuronale Netzwerke ; Parametrische Kurven ; Probabilistic Sequence Modeling ; Stochastic Processes ; Neural Networks ; Parametric Curves ; 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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  • 25
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    Bildfolgenbasierte Gewinnung und Nutzung partikelindividueller Bewegungsinformation in der optischen Schüttgutsortierung (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Sensor-based sorting enables the separation of individual particles from a material stream. In this work, a novel sorting system using an area-scan camera is investigated. The use of high-speed cameras raises exciting research questions from a computer science perspective regarding the extraction and use of more advanced features, especially motion information about the materials to be sorted.
    Keywords: Sichtprüfung; sensorgestützte Sortierung; Multiobjekt-Tracking; Klassifikation; Optical inspection; sensor-based sorting; multiobject tracking; classification ; 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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  • 26
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    Consistent View-Based Management of Variability in Space and Time (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Developing variable systems faces many challenges. Dependencies between interrelated artifacts within a product variant, such as code or diagrams, across product variants and across their revisions quickly lead to inconsistencies during evolution. This work provides a unification of common concepts and operations for variability management, identifies variability-related inconsistencies and presents an approach for view-based consistency preservation of variable systems.
    Keywords: Softwaretechnik; Modellgetriebene Entwicklung; Variabilitätsmanagement; software engineering; model-driven engineering; variability management ; 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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  • 27
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    Architectural Data Flow Analysis for Detecting Violations of Confidentiality Requirements (2022)
    KIT Scientific Publishing
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    Publication Date: 2024-04-14
    Description: Software vendors must consider confidentiality especially while creating software architectures because decisions made here are hard to change later. Our approach represents and analyzes data flows in software architectures. Systems specify data flows and confidentiality requirements specify limitations of data flows. Software architects use detected violations of these limitations to improve the system. We demonstrate how to integrate our approach into existing development processes.
    Keywords: Vertraulichkeit; Zugriffskontrolle; Informationsflusskontrolle; Datenflüsse; Softwarearchitektur; confidentiality; access control; information flow control; data flows; software architecture ; 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
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  • 28
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    Active Vision for Scene Understanding (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-14
    Description: Visual perception is one of the most important sources of information for both humans and robots. A particular challenge is the acquisition and interpretation of complex unstructured scenes. This work contributes to active vision for humanoid robots. A semantic model of the scene is created, which is extended by successively changing the robot's view in order to explore interaction possibilities of the scene.
    Keywords: Roboter ; Humanoide Robotik ; robots ; Robots ; humanoid robots ; 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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    Distributed Optimization with Application to Power Systems and Control (2022)
    KIT Scientific Publishing | KIT Scientific Publishing
    Details
    Publication Date: 2024-04-14
    Description: Mathematical optimization techniques are among the most successful tools for controlling technical systems optimally with feasibility guarantees. Yet, they are often centralized—all data has to be collected in one central and computationally powerful entity. Methods from distributed optimization overcome this limitation. Classical approaches, however, are often not applicable due to non-convexities. This work develops one of the first frameworks for distributed non-convex optimization.
    Keywords: Verteilte Optimierung ; Dezentrale Optimierung ; ALADIN ; ADMM ; Optimal Power Flow ; distributed optimization ; decentralized optimization ; optimal power flow ; 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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    Millimeter-Wave Radio-over-Fiber Links based on Mode-Locked Laser Diodes (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Radio communications in the range of 60 GHz enable multi-Gigabit/s network access in indoor environments. Due to the propagation characteristics of such signals only very short range radio transmission is feasible. In order to distribute these signals across large distances, analog transmission over optical fiber is considered. In this work, mode-locked laser diodes serve as optoelectronic oscillators for the generation of such signals. Their system-relevant properties are studied in detail.
    Keywords: T1-995 ; millimeter wave communications ; mode-locked lasers ; wireless personal area networks ; radio-over-fiber ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 31
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    Herstellung und Charakterisierung mechanisch flexibler organischer Solarzellen durch Flüssigprozessierung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This document presents the development and optoelectronic analysis of a flexible electrode system. The focus is the application of all functional layers out of solution to enable a cost effective processing with large area print and coating techniques. Moreover, the mechanical stability of the electrode system and the complete solar cell is investigated by tensile tests.
    Keywords: T1-995 ; organische Halbleiter ; printed electronics ; flexible electronics ; druckbare Elektronik ; Photovoltaik ; flexible Elektronik photovoltaic ; organic semiconductor ; solar cell ; Solarzelle ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 32
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    Entwicklung und vergleichende Bewertung einer bildbasierten Markierungslichtsteuerung für Kraftfahrzeuge (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In automotive lighting technology there have been taken place intense research efforts in the field of adaptive lighting systems to provide a flexible luminance intensity distribution optimally adapted to the situational prevailing traffic and atmospheric situation in the last recent years.This paper describes the development and comparative evaluation of an image-based control system for a marking light approach designed for motor vehicles.
    Keywords: T1-995 ; Bildverarbeitung ; Probandenstudie ; Lichtbasiertes Fahrerassistenzsystem ; Erkennbarkeitsentfernung ; Dynamische Zustandsschätzung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 33
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    Modellbasierte Entwicklung eines aktiven Sicherheitssystems für elektrifizierte Fahrräder (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The electrical energy on electrified bicycles offers new functional possibilities such as an active safety system to assist the rider during the braking process. This work shows the technical feasibility of such a system by presenting a rideable prototype. The so-called braking dynamics assistance system prevents the cyclist from both front wheel lockup and rollover (along the vehicle’s transverse axis).
    Keywords: T1-995 ; Elektrofahrrad ; safety system ; Fahrdynamik ; Electric bicycle ; vehicle dynamics ; model-based design ; Verkehrssicherheit ; road safety ; Modellbasierte Entwicklung ; Sicherheitssystem ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Entwicklung einer Plattform zur individuellen Ansteuerung von Mikroventilen und Aktoren auf der Grundlage eines Phasenüberganges zum Einsatz in der Mikrofluidik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Im Rahmen dieser Arbeit wurde eine Plattform zur individuellen Ansteuerung einer Vielzahl thermisch aktivierter Mikroventile und aktoren, auf Grundlage eines Phasenüberganges, zum Einsatz in der Mikrofluidik entwickelt. Ventile dienen dazu den Fluidstrom in komplexen mikrofluidischen Systemen, aus Einsatzgebieten wie der Biologie, Chemie oder Biotechnologie, zu manipulieren. Mit steigender Komplexität der Mikrosysteme steigt auch die Anzahl der benötigten, individuell steuerbaren Mikroventile.
    Keywords: T1-995 ; thermisch ; Mikrofluidik ; Mikroventile ; Phasenübergang ; Mikroaktoren ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 35
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    Energieoptimale Fahrdynamikregelung mehrmotoriger Elektrofahrzeuge (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Within the scope of this work a generic approach to the control of multiple-drive electric vehicles is evolved. An analysis of the overall system with respect to the exploitable degrees of freedom for wheel torque control reveals that several possible solutions for distributing wheel torque exist in certain driving situations. This characteristic of over-actuated systems is exploited in order to pursue further subordinate objectives from from a control perspective.
    Keywords: T1-995 ; mehrmotoriger Antriebsstrangvehicle dynamics control ; efficiency ; energieoptimal ; Elektrofahrzeug ; torque allocation ; Fahrdynamik ; over-actuated ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Prädiktive Lichtfunktionen für volladaptive Scheinwerfersysteme (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, the realisation of an adaptive driving beam is examined that is based on the motion prediction of the ego vehicle and other traffic participants. Furthermore, light functions are developed and analysed regarding their effectiveness that project situation adaptive recommendations for action in front of the vehicle regarding a turn or lane change intention of the driver.
    Keywords: T1-995 ; Trajektorienprädiktion ; maneuver detection ; trajectory prediction ; predictive light functions ; Lichtbasierte Assistenzsysteme ; Prädiktive Lichtfunktionen ; Manöverdetektion ; light-based assistance systems ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Tourenplanung mit alternativen Lieferperioden und Teillieferungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This book examines the Vehicle-Routing-Problem with split-deliveries and alternative delivery periods (SDVRPA). It is solved with a Branch-and-Price-Algorithm. When alternative delivery periods and split-deliveries are employed, freight forwarders get a wider scope for planning and can therefore plan more efficient routes. Even with few alternative delivery periods, which allow vehicles to be used more efficiently, substantial savings can be achieved.
    Keywords: T1-995 ; Column-Generation ; SDVRPAVehicle-Routing-Problem ; Alternative Periods ; SDVRPA ; Tourenplanung ; Teillieferungen ; Branch-Price-and-Cut ; Alternative Perioden ; Split-Deliveries ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 38
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    Neues Konzept zur Bewegungsanalyse und -synthese für Humanoide Roboter basierend auf Vorbildern aus der Biologie (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: New methods to generate and analyze motions of humanoid robots are presented and applied to a demonstrator. Reflexes of humans and neural central pattern generators (CPGs) were used as archetype. With leaky Integrate-and-Fire neurons a generic reflex template was designed and put to work for several specialized reflexes. The designed CPGs were used to analyze robotik motion as well as for generation of locomotion patterns on a biped demonstrator.
    Keywords: T1-995 ; Reflexe ; Humanoider Roboter ; Zentrale MustergeneratorenHumanoid Robot ; CentralPatternGenerator ; Reflexes ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 39
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    Zum Phasengleichgewicht und Stofftransport in vernetzten Polymersystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die vorliegende Arbeit beschäftigt sich mit der Phasengleichgewichts- und Stofftransportcharakteristik vernetzter Polymere, wie sie in Controlled-Release-Anwendungen, der Brennstoffzellen- und Separationstechnologie oder der Sensor-Aktor-Technik zum Einsatz kommen. Dabei werden insbesondere auch Strategien zur quantitativen Bestimmung der relevanten Gleichgewichts- und Transportparameter vorgestellt, welche auf der Kopplung einer spektroskopischen Messmethode und Simulationsrechnungen basieren.
    Keywords: T1-995 ; Polymermembran ; Stofftransport ; Polyvinylalkohol ; Raman-Spektroskopie ; Phasengleichgewicht ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 40
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    Time-dependent spectrum analysis of high power gyrotrons (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this work, a novel measurement system for the analysis of the gyrotron RF output spectrum was developed. It enables unprecedented time dependent measurements within a large bandwidth, dynamic range and unambiguous RF indication in the entire D-Band (110-170 GHz). Special attention was given to the investigation of parasitic RF oscillations, and the analysis of the interplay of thermal cavity expansion and ionization-based space charge neutralization at the start of long RF pulses.
    Keywords: T1-995 ; spectrum analysis ; Mikrowellenmesstechnik ; millimeter waves ; Gyrotron ; Spektralanalyse ; Millimeterwellen ; microwave measurement techniques ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 41
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    Neues Konzept für die bedarfsgerechte Energieversorgung des Künstlichen Akkommodationssystems (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Das Wiederherstellen der Akkommodationsfähigkeit des Auges bei Presbyopie oder nach Kataraktoperationen stellt derzeit eine der größten Herausforderungen der Augenheilkunde dar. Das Künstliche Akkommodationssystem ermöglicht die dauerhafte Wiederherstellung der Akkommodationsfähigkeit. In der vorliegenden Arbeit wird ein neues Konzept für die bedarfsgerechte Energieversorgung des Künstlichen Akkommodationssystems erstellt.
    Keywords: T1-995 ; Akkommodationssystem bedarfsgerecht Energieversorgung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 42
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    Ein Verfahren zum automatischen Entwurf von Mensch-Maschine-Schnittstellen am Beispiel myoelektrischer Handprothesen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die Steuerung von künstlichen Gliedmaßen durch Muskel- bzw. Nervensignale oder von virtuellen Tastaturen durch Hirnsignale erfordert eine Schnittstelle, die die menschlichen Wünsche erfasst, interpretiert und dem angeschlossenen System verfügbar macht. Bestehende Systeme zeichnen sich durch eine einfache Bedienbarkeit aus, verfügen jedoch nur über eine eingeschränkte Funktionalität und müssen zudem manuell entworfen werden.In dieser Arbeit wird ein neues Verfahren zum automatischen Entwurf von MMIs vorgestellt und so die Funktionalität bestehender Systeme erweitert.
    Keywords: T1-995 ; Mensch-Maschine-Schnittstelle ; Diskriminanzfunktion ; Mensch-Maschine-Kommunikation ; Echtzeitverarbeitung ; Entwurfsautomation ; Steuerung ; Lernende Steuerung ; Klassifikation ; Muskelkontraktion ; Systementwurf ; Gehirn-Computer-Schnittstelle ; Echtheit / Merkmal ; Diskriminanzanalyse ; Elektromyographie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 43
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    Magnetic Resonance Imaging on Patients with Implanted Cardiac Pacemakers (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The aim of this work was to identify the patterns that can induce heating around implanted cardiac pacemakers during MRI and to develop strategies to counteract them. Two approaches were taken: computer simulations of the occurring electromagnetic field distributions and in-vitro experiments using phantoms in real MRI devices, both for conventional bore-hole and new open MRI systems. Using the open MRI, the observed heating could be reduced significantly.
    Keywords: T1-995 ; pacemaker ; MRI ; numerical field calculation ; biomedical engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 44
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    Werkstoffanalytische Betrachtung der Eigenschaften von mittels neuartiger RTM-Fertigungsprozesse hergestellten glasfaserverstärkten Polymerverbunden (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this work fiber reinforced polymers were characterized. The composites were manufactured with optimized resin transfer molding (RTM) production strategies to make the standard RTM process more efficient. To determine where the potential of the new production techniques is the quasi static mechanical properties were measured and also calculated with an analytical modulation. On this database the different processes were compared to each other.
    Keywords: T1-995 ; Werkstoffprüfung ; RTM-Fertigungsverfahren ; process comparison ; Polymer ; RTM ; Verbundwerkstoff ; materials characterization ; RTM manufacturing process ; Glasfaser ; aserverbundwerkstoffe ; Prozessvergleich ; fiber reinforced polymers ; Materialcharakterisierung ; Analytische Modellierung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Realization Limits of Impulse-Radio UWB Indoor Localization Systems (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, the realization limits of an impulse-based Ultra-Wideband (UWB) localization system for indoor applications have been thoroughly investigated and verified by measurements. The analysis spans from the position calculation algorithms, through hardware realization and modeling, up to the localization experiments conducted in realistic scenarios. The main focus was put on identification and characterization of limiting factors as well as developing methods to overcome them.
    Keywords: T1-995 ; localization ; UWB ; transceiver ; positioning ; ultra-wideband ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 46
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    Untersuchung der Schwingungseigenschaften von teleskopierbaren Maschinenelementen mit Spiel am Beispiel eines Gabelstapler-Hubgerüstes (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Teleskopierbare, spielbehaftete Hubgerüste von Gabelstaplern werden während eines Arbeitszyklus oftmals zu Schwingungen angeregt. Die charakteristischen Schwingungseigenschaften, bedingt durch das usammenwirken von Spiel, auskragender Last und Schwerkraft, werden experimentell untersucht und durch ein 5-Massen-Modell sehr gut abgebildet.Sowohl mit aktiven als auch mit passiven Maßnahmen lassen sich die Schwingungen schnell und deutlich reduzieren.
    Keywords: T1-995 ; Maschinenelement ; Spiel ; Schwingungsverhalten ; Gabelstapler ; Flurförderer ; Hubgerüst ; Schwingungsdämpfer ; Schwingungstilger ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Beitrag zur modellbasierten Regelung von Verbrennungsprozessen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Verbrennungsprozesse sind meist mit der Emission von Schadstoffen verbunden, weshalb sie möglichst schadstoffarm und energieeffizient geführt werden müssen.Bei den bislang dominierenden primären Brennstoffen sind aufgrund der gleichbleibenden Brennstoffeigenschaften langfristig optimierte Technologien und feste Regelungen einsetzbar. Zunehmend werden jedoch sekundäre Brennstoffe wie Prozessabgase oder Biomasse genutzt. Sie haben stark veränderliche chemisch-physikalische Eigenschaften und bewirken so einen veränderlichen Verbrennungsablauf der schwierig beherrschbar ist. Eine optimale Verbrennung lässt sich dann nur durch eine an den Verbrennungszustand und die Brennstoffe adaptierte modellbasierte Prozessregelung erreichen, die noch nicht Stand der Technik ist.Die Arbeit widmet sich im ersten Schwerpunkt dem modellbasierten Reglungsentwurf. Die theoretische Modellierung und der modellbasierte Entwurf adaptiver Regelungen für die Temperatur und die Sauerstoffkonzentration im Abgas wird am Beispiel einer halbtechnischen Brennkammer für veränderliche Brenngase analysiert. Berücksichtigt wird dabei das für Verbrennungen typische vorhaltbehaftete Regelstreckenverhalten.Der zweite Schwerpunkt bildet die online Messung und die rechnerba-sierte Auswertung von Zustandsgrößen am Beispiel der infrarotbasierten Temperaturmessung bei einem Feststoffbrennbett. Es werden neue Auswerteverfahren entwickelt, die sich u.a. auch bei der Regelung industrieller Verbrennungen bewährt haben.
    Keywords: T1-995 ; Modellierung ; Verbrennungsanalyse ; Regelungstechnik ; Technikumsanlage ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Direct hydroxylation of benzene to phenol in a microstructured Pd-based membrane reactor (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The gas phase direct hydroxylation of benzene into phenol with hydrogen and oxygen, as initially described by Niwa in 2002, was realized in a newly developed double-membrane reactor. In the concept described by Niwa, a dense Pd membrane is used for the (safe) dosage of dissociated hydrogen species into the tubular reaction zone, where it reacts with gas phase oxygen to form surface species capable of directly converting benzene into phenol in a single-step process.
    Keywords: T1-995 ; Pd-Membran ; Katalyse ; Phenol ; Benzol ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Magnetization of High Temperature Superconducting Trapped-Field Magnets (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: High temperature superconducting (HTS) bulks and stacks of coated conductors can be magnetized to become trapped-field magnets that provide much stronger magnetic fields than those reachable with conventional permanent magnets. This work investigates the flux dynamics during the magnetization of HTS trapped-field magnets and proposes possible strategies to improve the trapped field produced by the pulsed field magnetization method that is promising for practical applications.
    Keywords: T1-995 ; trapped-field magnet ; Hochtemperatur-Supraleiter ; pulsed field magnetization ; High temperature superconductor ; Supraleiter mit eingeschlossenem Magnetfeld ; gepulste Feldmagnetisierung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    Modeling of electrophysiology and tension development in the human heart (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Comprehension of the beating of the human heart is important for cardiac research and will improve many clinical applications. Simulations based on models describing cardiac electro-mechanics can acquire insights into this behavior. This work focuses on the mathematical reconstruction of electrophysiology, excitation conduction, and tension development in the human heart on the cellular and the tissue level. The tissue models represent accurate anatomical shapes of the atria and the ventricles and incorporate electrophysiological heterogeneity and anisotropic conduction. The simulations comprehend the physiological behavior of the ventricles and of the atrium including the sinoatrial node as well as pathological cases like ventricular and atrial fibrillation and genetic defects in ionic channels.
    Keywords: T1-995 ; Heterogenität ; Gewebe ; Kardiologie ; Computersimulation ; Ionenkanal ; Aktionspotenzial ; Erregung ; Elektrophysiologie ; Muskelfaser ; Kraft ; Tachykardie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Flow control : theoretical concept of absolute instability (2021)
    KIT Scientific Publishing
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    Publication Date: 2023-12-21
    Description: At the 37th Prandtl memorial lecture on Regions of Viccous Flow, H.Oertel 1994 developed for the first time the stability theory of local perturbations in boundary layers and wake flows, as well as their practical application in the flow control of vehicle flows and the boundary layer of civil aircraft wings.This work presents how the stability theory concept of absolute instability has advanced and proven in practice in the last 15 years in terms of the efficient flow control.
    Keywords: T1-995 ; Flow Control ; Fluid Mechanics ; Stability Theory ; Wake Flow ; Bundary Layer Transition ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Measuring the Impact of Lean Techniques on Performance Indicators in Logistics Operations (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Several in-depth studies have verified the positive impact of lean techniques on performance indicators in production environments. Studies performed on warehouse environments have partially confirmed this. This thesis helped to close the gap between the disparities in the level of evidence mentioned above. A study was conducted that included 16 warehouses in an observation group and 56 warehouses in a control group. These significant results help close the gap in the evidence.
    Keywords: T1-995 ; Lean Management ; Lean Production ; schlanke Produktionssysteme ; Lager ; LogistikLean Management ; KPI ; Logistikzentren ; Lean Warehousing ; Logistics ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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    Unternehmensspezifisches Klassifikationssystem zur effizienten Datenverwaltung (mit Anwendungsszenarien aus der Praxis). Abschlußbericht des Verbundprojektes ""Klassifikationssysteme automatisiert erstellen"" (KLASTER) + 1 CD (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Innerhalb des zweijährigen Verbundprojektes KLASTER (Klassifikationssysteme automatisiert erstellen) wurde aufbauend auf den Ergebnissen des Vorgängerprojektes PAK (Produkte automatisch klassifizieren) ein Konzept erarbeitet und validiert, das eine Automatisierung des Klassifizierungsprozesses erlaubt. Während innerhalb von PAK die automatische Einordnung von Objekten in eine existierende Klassenstruktur behandelt wurde, beschäftigt sich KLASTER mit der automatischen Erstellung eines unternehmensspezifischen Klassensystems.Der vorliegende Abschlussbericht beschreibt neben dem Konzept ausführlich Anwendungsbeispiele bei den beteiligten Projektpartnern.
    Keywords: T1-995 ; Klassifikation ; Datenverwaltung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Spurführungsregelung eines aktiv gelenkten Radpaars für Straßenbahnen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents investigates the feasibility of the ""directly steered wheels (DSW)"" under operating condition of tramcars. After analyzing the wheel/rail geometric contact between track and DSW, a mathematical model has been developed to describe the lateral dynamics. Based on this model, a robust guidance controller is designed according to the µ-synthesis. The results of simulations show that the DSW with the designed controller can improve the running performance of tramcars significantly.
    Keywords: T1-995 ; aktive Spurführung ; active guidance ; directly steered wheels ; Straßenbahn&#956 ; -Synthesis ; µ-synthesis ; wheel/rail geometric contact ; Rad-Schiene-Kontaktkinematik ; aktiv gelenktes Radpaar ; tramcar ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 55
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    AlGaN/GaN-HEMT power amplifiers with optimized power-added efficiency for X-band applications (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: This work has arisen out of the strong demand for a superior power-added efficiency (PAE) of AlGaN/GaN high electron mobility transistor (HEMT) high-power amplifiers (HPAs) that are part of any advanced wireless multifunctional RF-system with limited prime energy. Different concepts and approaches on device and design level for PAE improvements are analyzed, e.g. structural and layout changes of the GaN transistor and advanced circuit design techniques for PAE improvements of GaN HEMT HPAs.
    Keywords: T1-995 ; MMIC design ; power amplifier ; AlGaN/GaN HEMT ; X-band ; power-added efficiency ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 56
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    Ansätze zur akustischen Optimierung von Reifen und Fahrbahnen für Elektrofahrzeuge unter Antriebsmoment (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work systematically describes the mechanisms of tyre/road noise atdriving and braking torque based on measurements with different tyres. The studies on the influence of circumferential force on tyre/road noise can be divided into two different tire tread designs. One sub-chapter reports about a selective influence of force induced tyre/road noise using inclined groove edges. The influence of the circumferential stiffness of the tread blocks on the tyre/road noise is discussed afterwards.
    Keywords: T1-995 ; Elektrofahrzeug ; electric vehicle ; Reifen-Fahrbahn-Geräusch ; Antriebsmomenttyre-road-noise ; driving torque ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 57
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    Produktgestaltung an kolloidalen Agglomeraten und Gelen : Gelierung und Fragmentierung anorganisch gefällten Siliciumdioxids (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Amorphes Siliciumdioxid findet als Füllstoff verbreitet Anwendung. Es wird u.a. durch die Vermischung einer Silikatlösung mit einer Säure hergestellt. Dabei entsteht intermediär ein Gel. Mit dieser Arbeit wird ein Beitrag zur Steuerung der Eigenschaften des Produktpulvers geleistet. Es wird eine Formel vorgestellt, mit der die Gelierzeit aus den Konzentrationen der Einsatzstoffe abgeschätzt werden kann. Für die Fragmentierung des Gels werden Parallelen zum Aufbruch hochviskoser Tropfen gezeigt.
    Keywords: T1-995 ; Kolloide ; Gelierung ; Verfahrenstechnik ; Agglomeration ; Partikeltechnologie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 58
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    Numerische Untersuchung des Verformungs- und Bruchverhaltens von einkristallinem Wolfram auf mikroskopischer Ebene (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The aim of the present work is to describe the deformation and fracture behavior of single crystal tungsten at the microscopic scale by using the ?nite element method. Therefore, the studies focus mainly on the in?uence of crystal orientation as well as the investigation of crack initiation and crack propagation. With a defined crack propagation model, the simulations of microbending allows for evaluating the details of the fracture process more accurately and supported the experimental studies.
    Keywords: T1-995 ; Microcracking ; Finite elements ; Crystal plasticity ; Wolframeinkristall ; KristallplastizitätSingle Crystal Tungsten ; Bruchzähigkeit ; Finite Elemente ; Mikrorißbildung ; Fracture toughness ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 59
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    Bewertung der Energieeffizienz von Antriebssystemen mobiler Arbeitsmaschinen am Beispiel Bagger (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this book a methodology for the evaluation of energy efficiency of mobile working machines by simulation is presented. It allows an efficiency analysis and systematic optimization of a single power train as well as a comparison of different power train concepts. The methodology is applied to a wheeled excavator. To ensure a realistic power demand in the simulation, a rule-based operator model is developed.
    Keywords: T1-995 ; simulation ; Energieeffizienz ; Bagger ; Mobile Arbeitsmaschinen ; Bewertungsmethodik ; Antriebssysteme ; Fahrermodellmobile machines ; excavator ; Simulation ; operator model ; energy efficiency ; evaluation methodology ; power trains ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 60
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    Durchgängige Timing-Bewertung von Vernetzungsarchitekturen und Gateway-Systemen im Kraftfahrzeug (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die steigende Anzahl von Elektrik-/Elektronik-Systemen im Automobil und damit verbunden das zunehmende Kommunikationsaufkommen stellen immer höhere Anforderungen an den Entwicklungsprozess. Aufgrund der wachsenden Anzahl an vernetzten Funktionen spielt die Betrachtung des Timing-Verhaltens der Systeme eine zentrale Rolle. Die Arbeit beschreibt eine Methodik, welche eine durchgängige Bewertung von Vernetzungsarchitekturen und Gateway-Systemen hinsichtlich deren Timing-Verhaltens ermöglicht.
    Keywords: T1-995 ; E/E-Architekturen ; Entwicklungsprozess ; Timing ; Vernetzungsarchitekturen ; Gateway-Systeme ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 61
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    Zum Einfluss von Fahrzeug- und Straßenparametern auf die Ausbildung von Straßenunebenheiten (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die vorliegende Arbeit untersucht den Einfluss unterschiedlicher Fahrzeug- und Straßenparameter auf die Ausbildung von longitudinalen Straßenunebenheiten. Hierzu wird ein abstrahiertes Fahrzeugmodell zur Abbildung der Vertikaldynamik von Lkw formuliert sowie ein phänomenologisches Gesetz zur Berechnung der bleibenden Straßenverformung verwendet. Mit Hilfe von analytischen und semianalytischen Methoden wird die Entwicklung einzelner Spektralanteile der Straßenoberfläche prognostiziert.
    Keywords: T1-995 ; Fahrzeugschwingungen ; Längsunebenheiten ; bleibende Verformung ; Parametereinfluss ; Fahrzeug-Straße-Interaktion ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 62
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    Funkkanalmodellierung für OFDM-Kommunikationssysteme bei Hochgeschwindigkeitszügen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In diesem Buch wird ein drahtloses OFDM-Kommunikationssystem für Hochgeschwindigkeitszüge analysiert, der Funkkanal modelliert und das Modell durch Messungen verifiziert. Mit Hilfe des Kanalmodells können drahtlose Zugkommunikationssysteme unter Berücksichtigung der hohen Zeitvarianz in optimaler Weise ausgelegt werden. Aus der Untersuchung verschiedener Einflüsse werden richtungsweisende Regeln für die Auslegung solcher Systeme abgeleitet und ein entsprechendes OFDM-System vorgeschlagen.
    Keywords: T1-995 ; Zeitvarianz ; OFDM-System ; Funkkanalmodellierung ; Hochgeschwindigkeitszüge ; drahtlose Kommunikation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 63
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    Effiziente MHz-Wechselrichter mit unipolaren SiC-Transistoren für Hochleistungs-Induktionslampen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents the design and investigation of a novel UV-lamp-system, which is based upon UV-induction lamps and a MHz-inverter equipped with normally-on junction field effect transistors (JFET). A system efficiency of some more than 27 % is verified with the prototype UV-induction lamp system, which positions between the two previous UV-systems and open up new fields of application.
    Keywords: T1-995 ; MHz-Wechselrichter ; Siliziumkarbid ; UV-disinfection ; resonant inverter ; UV-Induktionslampe ; UV-induction lamp ; Resonanzwechselrichter ; silicon carbide ; UV-DesinfektionMHz inverter ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 64
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    Prüfplanung : ein neues Prozessmanagement für Fahrzeugprüfungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Die Arbeit analysiert die Potentiale der Risikoanalyse für die Planung von Prüfungen, Tests und Wartungsmaßnahmen an technischen Systemen. Der Autor beschreibt ein Prozessmanagement zur Prüfplanung, welches die Definition von komponenten- und funktionsbezogenen Qualitätsmerkmalen, die Risikobewertung der Qualitätsmerkmale, sowie einen neuartigen numerischen Priorisierungsalgorithmus umfasst. Die Methode ist generisch formuliert, die Anwendung ist für Personenkraftwagen erläutert.
    Keywords: T1-995 ; Wartung ; Test ; Fahrzeugprüfung ; Prüfung ; Risikoanalyse ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 65
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    Diffraktive Optiken im Automobil - Achromatisierung, Athermalisierung, Formung von Scheinwerferlichtverteilungen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: The complexity of optical systems in headlamps is increasing rapidly. This leads to new design concepts, but it is also leading to increasing influence of aberrations. This work is dealing with the minimization of chromatical and thermal effects by using diffractive optics. Therefore, a new lens design in combination with the optical simulation of diffractive structures based on ray tracing is presented.
    Keywords: T1-995 ; Athermalisierung ; headlamp ; Achromatisierung ; diffractive ; athermalization ; Optikachromatization ; Scheinwerfer ; diffraktiv ; optics ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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    Image Analysis and Evaluation of Cylinder Bore Surfaces in Micrographs (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work presents two image-based inspection approaches for the quality evaluation of cylinder bore surfaces. In the first algorithm, metal folds on plateau-honed surfaces are inspected with scanning electron microscopy. An edge-aware structure tensor is proposed for feature extraction and localization of surface defects. The second algorithm uses a morphgraphical method for detecting graphite grains in optical micrographs. Based on the inspection results, quality parameters are proposed.
    Keywords: T1-995 ; image processing ; Bildverarbeitung ; Kantendetektion ; Mikrographhoning ; micrograph ; automated vision inspection ; Honung ; edge detection ; Automatische Sichtprüfung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 67
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    Simulation von Fahrspielen und Energieflüssen in Nahverkehrssystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: For ecological und economic reasons, special attention is paid to the energy balance of rail-bound, local, direct current-based transport systems. With the tram and urban railway network of Karlsruhe being used as an example, 16 simulation scenarios with different measures for energy optimization are analysed in a coupled computation of driving cycles and energy flows.
    Keywords: T1-995 ; energy flow calculation ; driving cycle simulation ; Fahrspielsimulation ; Energieflussberechnung ; local transport system ; Nahverkehrssystem ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 68
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    Ontologie-basierte Definition von Anforderungen an Validierungswerkzeuge in der Fahrzeugtechnik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Validation and verification are central activities of product engineering. The aim of these activities is to predict and evaluate the future system behaviour of the product in development. This is achieved by conducting tests and interpreting the generated measurement data. This work introduces an ontology-based method for increasing the efficiency and effectively of innovative automotive development projects, especially in cases where an organisational knowledge base does not exist yet.
    Keywords: T1-995 ; Wissensmanagement ; Validierung ; ProduktentwicklungAutomobile technology ; knowledge management ; Fahrzeugtechnik ; validation ; product engineering ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 69
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    Duktilisierung von Wolfram : Synthese, Analyse und Charakterisierung von Wolframlaminaten aus Wolframfolie (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Der in dieser Arbeit untersuchte Ansatz ist die Duktilisierung von Wolfram durch Synthese eines Wolframlaminats. Da Wolframfolie duktil ist und sich selbst bei Raumtemperatur plastisch verformen lässt, könnte es durch Übereinanderschichten und geeignetes Verbinden mehrerer Folienlagen gelingen, die duktilen Eigenschaften der Wolframfolie auf ein Massivbauteil zu übertragen.
    Keywords: T1-995 ; Laminate ; Wolfram ; Duktilisierung ; Wolframlaminate ; Wolframfolie ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 70
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    Spaltverhalten von Holz beim Eindrehen von selbstbohrenden Holzschrauben (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Für Verbindungen im Holzbau werden häufig selbstbohrende Holzschrauben eingesetzt. Diese können oft mit geringen Abständen untereinander und zu den Bauteilrändern angeordnet werden. Durch die Einhaltung von Mindestabständen und Mindestholzdicken soll hierbei ein Versagen des Holzes durch Aufspalten verhindert werden. Im Rahmen dieser Arbeit wurde ein Verfahren entwickelt, mit dem sich die Anforderungen an Abständen und Holzdicken effizienter und zuverlässiger als bisher bestimmen lassen.
    Keywords: T1-995 ; Mindestabstände ; Holzschrauben ; Holzbau ; Verbindungen ; Spaltversagen ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 71
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    The Effects of Internal Stress and Lithium Transport on Fracture in Storage Materials in Lithium-Ion Batteries (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Fracture of storage particles is considered to be one of the major reasons for capacity fade and increasing power loss in Li-ion batteries. In this work, we tackle the problem by merging a coupled model of mechanical stress and diffusion of Li-ions with a phase field description of an evolving crack. The novel approach allows us to study the evolution of the Li concentration together with the initiation and growth of a crack in an arbitrary geometry and without presuming a specific crack path.
    Keywords: T1-995 ; Lithium-Diffusion ; Lithium-Ionen-BatterienCrack Growth ; Storage Particles ; Risswachstum ; Phasefield ; Li-Diffusion ; Phasenfeld ; Li-Ion-Batteries ; Speicherpartikel ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 72
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    Konditionierung von biogenen Energieträgern aus den Produkten der bioliq®-Schnellpyrolyse (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Within the bioliq®-process, the organic phase of straw pyrolysis condensates can be gasified directly, while the aqueous phase can be mixed with char to form a slurry, which also can be gasified. For production and storage, several mixers and stirrers are examined. Grinding the porous and elongated char particles decelerates sedimentation and also reduces the viscosity. Thus, higher concentrated slurries can be mixed, which leads to higher stability.
    Keywords: T1-995 ; Pyrolysekondensat ; Vergasungchar ; pyrolysis condensate ; gasification ; Suspension ; Mischen ; slurry ; mix ; Koks ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 73
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    Entwicklung supraleitender, strombegrenzender Transformatoren (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Durch den Einsatz von Hochtemperatursupraleitern (HTSL) können Verluste, Volumen und Gewicht von Transformatoren reduziert werden, zudem werden diese aktiv Fehlerstrom begrenzend. In dieser Arbeit wurde die Rückkühlung von YBCO-Bandleitern nach einer Strombegrenzung untersucht. Weiterhin wurde ein Entwurfsgang für HTSL-Transformatoren erstellt und ein 60 kVA-Transformator entworfen und getestet. Darüber hinaus wurde eine Fallstudie zur Energieeinsparung durch HTSL-Transformatoren erstellt.
    Keywords: T1-995 ; Anwendung der Supraleitung ; YBCO-Bandleiter ; Hochtemperatursupraleitung ; Strombegrenzung ; Transformatoren ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 74
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    Analyse der mechanischen Randbedingungen zur Adaption der oszillierenden Hinterschneidtechnik an einen Mobilbagger (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The oscillating disc cutting process has shown excellent results in precisely removing area-limited-concrete structures. Due to the highly dynamic oscillatory motion, the stiffness requirements to the tool structure and the basic machine have to be considered, which is the main purpose of this work. Based on these results, a concept of a mechanical adaption of the oscillating disc cutting process to an excavator attachment tool will be developed and tested on a prototype.
    Keywords: T1-995 ; system analysis ; MobilbaggerDisc Cutting ; Werkzeugadaption ; Systemanalyse ; stiffness requirement ; Hinterschneidtechnik ; Steifigkeitsanforderung ; Wheeled Excavator ; tool adaption ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 75
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    Silicon-Organic Hybrid Platform for Photonic Integrated Circuits (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: We study the potential of the silicon-organic hybrid (SOH) platform for integrated optics. The unique properties of selected organic materials are added to silicon devices made with CMOS-based processes. We investigate the feasibility of this approach by making prototypes of key components in form of photonic integrated circuits: SOH lasers and SOH modulators are designed, fabricated, post-processed, and characterized. Application scenarios are identified.
    Keywords: T1-995 ; CMOS ; Modulator ; laser ; modulator ; Silizium-Photonik ; Laser ; Detektor ; CMOSsilicon photonics ; detector ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 76
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    Nichtlineare Modellierung von Ferroelektrika unter Berücksichtigung der elektrischen Leitfähigkeit (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit wird ein Simulationswerkzeug zur Untersuchung des komplexen elektromechanischen Verhaltens von Ferroelektrika entwickelt. Es wird ein neues Materialmodell vorgestellt, das die elektrische Leitfähigkeit der Ferroelektrika berücksichtigt. Anhand von anwendungsnahen Beispielen wird der Einfluss der elektrischen Leitfähigkeit untersucht.
    Keywords: T1-995 ; Ferroelektrika ; Materialmodell ; Finite-Elemente-Methode ; elektrische Leitfähigkeit ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 77
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    Biegefestigkeit von Brettschichtholz-Hybridträgern mit Randlamellen aus Buchenholz und Kernlamellen aus Nadelholz (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In der Forschungsarbeit wird die Verwendung von Nadelholz statt Buchenholz im weniger biegebeanspruchten Kernbereich von Brettschichtholz untersucht. Es wird anhand von Versuchen und mithilfe von numerischen Methoden gezeigt, dass sich mit so genannten Hybridträgern hohe Festigkeitswerte und geringere Materialkosten als bei reinen Buchenträgern miteinander vereinen lassen.
    Keywords: T1-995 ; Fichte ; Tan ; Brettschichtholz ; Keilzinkung ; Vollwandträger ; Rotbuche ; Biegefestigkeit ; Nadelholz ; Buchenholz ; Fichtenholz ; Elastizitätsmodul ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Gleisselektive Ortung von Schienenfahrzeugen mit bordautonomer Sensorik (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit wird eine gleisselektive, bordautonome Ortungsplattform für Schienenfahrzeuge unter Verwendung diversitärer, redundanter Sensoren vorgestellt. Durch die Verwendung eines neuartigen Wirbelstrom-Sensorsystems in Kombination mit inertialer Sensorik, GPS und einer digitalen Streckenkarte werden die Anforderungen an eine sicherheitsrelevante Ortungsplattform erfüllt. Hierbei werden unterschiedliche Fusionsansätze hergeleitet und anhand realer Messdaten bewertend verglichen.
    Keywords: T1-995 ; Map-Matching ; Schienenfahrzeuge ; Ortung ; Weichenerkennung ; Kalman-Filter ; Wirbelstrom-Sensorsystem ; Integriertes Navigationssystem ; Informationsfusion ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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    Numerical Modeling of Stagnation Flows over Porous Catalytic Surfaces (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this book, stagnation flows on a catalytic porous plate is modeled one-dimensionally coupled with multi-step surface reaction mechanisms and molecular transport (diffusion and conduction) in the flow field and in the porous catalyst. Internal and external mass transfer limitations as well as possible reaction routes in the catalyst are investigated for CO oxidation, WGS reaction, partial and steam reforming of methane over Rh/Al?O?.
    Keywords: T1-995 ; Heterogeneous catalysis ; Stofftransportlimitierungen ; Reaktion-DiffusionStagnation-flow reactor ; Staupunktreaktor ; Reaction-Diffusion ; Heterogenen Katalyse ; External and internal mass transfer limitation ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 80
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    Electrical-field sensitive YBa?Cu?O??? detectors for real-time monitoring of picosecond THz pulses (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: This work investigates the capability of the high-temperature superconductor YBCO to sense the evolution of the electrical field of THz pulses. A deposition process for ten unit-cell thin films and a sub-µm patterning process were developed to enable high sensitivities. The detector response to THz exctiations and its electrical-field sensitivity were studied. This unique characteristic allows for the investigation of instabilities of the THz radiation emitted from synchrotron storage rings.
    Keywords: T1-995 ; electrical-field sensitivity ; E-Feld Sensitivität ; synchrotron ; terahertz radiation ; YBCO ; Dünnfilmabscheidung ; Synchrotron ; thin film deposition ; Terahertzstrahlung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
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    High accuracy determination of skin friction differences in an air channel flow based on pressure drop measurements (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: The present work delivers a versatile, accurate and reliable wind tunnel facility that is particularly developed to test different flow control techniques for drag reduction in precisely adjustable test conditions. Skin friction changes of 0.4% are resolved, which is comparable to the most accurate reported studies in liquids. this high accuracy is verified through a comprehensive uncertainty analysis. Subsequently, various passive and active flow control strategies are investigated.
    Keywords: T1-995 ; Riblets ; Kanalströmung ; pressure measurement ; riblets ; accuracy ; Messgenauigkeitchannel flow ; drag reduction ; Wandreibung ; Druckmessung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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    ECG Based Analysis of the Ventricular Repolarisation in the Human Heart (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: ECG recordings provide diagnostic relevant information on the de- and repolarisation sequences of the heart. A modification of the repolarisation sequence is assumed to cause Torsades de Pointes. Especially drug induced effects on the repolarisation processes are in focus, since some non-cardiac drugs have been associated with sudden cardiac death in the 1990s. The analysis of the ventricular repolarisation using a set of parameters depicting the morphology of the T-wave is introduced in this work. Therefore, new methods of fully automatic patient-specific QRS detection, beat classification and precise T-wave delineation are presented. Using these methods, medical studies are investigated regarding the modification of the T-wave by different compounds. Also the impact of the heart rate on the morphology of the T-wave is part of this research.The reliable identification of ventricular ectopic beats allows an analysis of the influence of these beats on subsequent heart beats. It turned out that the morphology of subsequent heart beats can significantly be changed. This might give new information on the proarrythmical risk of ventricular ectopic beats.
    Keywords: T1-995 ; QT interval ; QT prolongation ; T wave ; Repolarisation ; HRT ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 83
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    Ein Vorgehensmodell zur automatischen Kopplung von Services am Beispiel der Integration von Standardsoftwaresystemen (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Heutige Architekturen von PLM-Lösungen sind überwiegend Client-Server orientiert. Mittelfristig wird sich hier eine offene, flexible-Architektur wie Service-orientierte Architekturen (SOA) durchsetzen. Dabei werden die PLM-Funktionen als Services zur Ausführung prozessrelevanter Tätigkeiten angeboten. Daraus ergibt sich ein service-basierter Ansatz für das PLM. Die Kombination von PLM und SOA kann so Unternehmen helfen, ihre bestehenden Infrastrukturen im Laufe der Zeit schrittweise aufzubauen.
    Keywords: T1-995 ; Produktdatenmanagement Integration SOA PDM PLM ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 84
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    Magnetisches Nanoaktorsystem (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Ziel dieser Arbeit ist die Entwicklung eines metallischen Nanoaktors, dessen mechanisches Verhalten über magnetische Felder gesteuert werden kann. Mit Hilfe der in der Mikrotechnik etablierten Technologien werden Titan-Nanobiegebalken realisiert, dessen Vorderenden mit einem magnetischen Element funktionalisiert sind. Prozessablauf und Charakterisierungsmethoden werden ausführlich beschrieben und liefern wertvolle Erkenntnisse für den Betrieb solcher Nanoaktoren in zukünftigen Nanosystemen.
    Keywords: T1-995 ; Nanoaktoren ; Magnetpartikel ; Nanostrukturierung. Nanobalken ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 85
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    Planung und Steuerung von Crossdocking-Zentren (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In dieser Arbeit werden zwei Verfahren zur operativen Planung und Steuerung von Crossdocking-Zentren (CDZ) entwickelt und bewertet. Es wird erläutert, wie externe Logistikdienstleister zur Steuerung von CDZ eingesetzt werden können und es werden sowohl ein zentral-hierarchischer als auch ein dezentral-heterarchischer Planungsansatz abgeleitet. Hierdurch lassen sich die Kosten in der Tourenplanung deutlich senken und es wird ein reibungsloser Ablauf der logistischen Prozesse im CDZ ermöglicht.
    Keywords: T1-995 ; Auktionstheorie ; Vickrey-Auktion ; Logistik ; Logistikplanung ; Tourenplanung ; Logistikunternehmen ; Ressourcenal ; Gemischt-ganzzahlige Optimierung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 86
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    Verfahren zur Entschwefelung von flüssigen handelsüblichen Brennstoffen für die Anwendung in Brennstoffzellensystemen durch partielle Verdampfung und anschließende hydrierende Entschwefelung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Um Brennstoffzellen mit flüssigen Brennstoffen zu betreiben, müssen diese fast schwefelfrei sein. Die Arbeit stellt ein neuartiges Verfahren zur Entschwefelung vor, bei dem nur der für die Brennstoffzelle bestimmte Teil des Einsatzstroms verdampft und in der Gasphase mit rezykliertem Wasserstoff aus der Brenngaserzeugung entschwefelt wird. Schwerpunkt ist die experimentelle Untersuchung der hydrierenden Entschwefelung von teilverdampftem Kerosin und Heizöl.
    Keywords: T1-995 ; Hydrierende Entschwefelung ; Brennstoffzelle ; Kerosin ; Heizöl ; Teilverdampfung ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 87
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    Zum Einfluß stochastischer Anregungen auf mechanische Systeme (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Dynamische Systeme sind durch die Angabe des Zeitverlaufs ihrer Zustandsvariablen vollständig beschreibbar. Diese Form ist jedoch für eine mathematische Bearbeitung ungeeignet. Die Datenmenge reduziert sich um ein vielfaches und eine mathematische Behandlung wird ermöglicht, wenn zur Beschreibung der dynamischen Systeme charakteristische Größen herangezogen werden.In dieser Arbeit werden mit der phänomenologischen Herangehensweise durch eine Untersuchung der Verteilungsdichten die Bifurkationen in stochastischen dynamischen Systemen beschrieben.
    Keywords: T1-995 ; Lineares dynamisches System ; Radsatz ; Fokker-Planck-Gleichung ; Stochastisches dynamisches System ; Nichtlineares dynamisches System ; Querdynamik ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 88
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    Feldtheoretische Modellierung der Materialprozessierung mit Mikrowellen im Durchlaufbetrieb (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Mikrowellen bewirken direkt im Inneren des zu prozessierenden Materials eine schnelle und energiesparende Heizung. In Kombination mit dem Durchlaufbetrieb wird eine besonders gleichmäßige Prozessierung sowie eine verbesserte Integration in den Produktionsprozeß erreicht. Es wird beschrieben, wie sich solche Applikatoren in konsistenter Weise modellieren lassen. Dies umfaßt die gekoppelte elektromagnetische und thermische Feldberechnung unter Berücksichtigung eines simultanen Materialvorschubs.
    Keywords: T1-995 ; Mikrowellenprozessierung Materialprozessierung Durchlaufbetrieb Modellierung Feldtheorie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 89
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    Development of an Electrochemical Biosensor Platform and a Suitable Low-Impedance Surface Modification Strategy (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: In this work, a flexible biosensor platform based on impedance spectroscopy and comprising of gold electrodes, polymeric flow cells and a suitable surface modification were developed. Initially, several surface modification techniques described in literature were implemented and optimized for impedimetric biosensors but their individual limitations rendered them unsuitable for this biosensor platform. A novel method based on photobleaching was developed and tested showing satisfactory results.
    Keywords: T1-995 ; Mikrofluidik ; electrochemical impedance spectroscopy ; Oberflächenmodifikation ; Biosensor ; surface modification ; photobleaching ; PhotobleichungBiosensor ; microfluidics ; Elektrochemische Impedanzspektroscopie ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 90
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    Grain-size effects in nanoscaled electrolyte and cathode thin films for solid oxide fuel cells (SOFC) (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: Due to their high energy conversion efficiencies and low emissions, Solid Oxide Fuel Cells (SOFCs) show promise as a replacement for combustion-based electrical generators at all sizes. Further increase of SOFC efficiency can be achieved by microstructural optimization of the oxygen-ion conducting electrolyte and the mixed ionic-electronic conducting cathode. By application of nanoscaled thin films, the exceptionally high efficiency allows the realization of mobile SOFCs.
    Keywords: T1-995 ; grain-size effect ; nanoscaled thin film ; solid oxide fuel cell (SOFC) ; cathode ; electrolyte ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: English
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  • 91
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    Verbrennungskontrollierte Erwärmung des Brennraums zur Emissionsreduktion während des Kaltstarts - Untersuchungen zu Emissionen und zur Flammenausbreitung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2024-04-09
    Description: This work describes the influence of catalytic converter heating strategies on the emissions during heating operation, as well as during the subsequent load demand at different engine start temperatures. A novel strategy is presented, that provides heating of the combustion chamber, without decreasing the catalyst converter heating significantly. The studies were carried out on a gasoline engine. Emissions were examined in detail. In addition, the flame propagation is evaluated experimentally.
    Keywords: T1-995 ; Katalysatorheizen ; cold start ; combustion process ; Flammenausbreitung ; particulate emission ; Partikelemissionen ; Brennverfahren ; Kaltstart ; flame Development ; catalytic converter heating ; thema EDItEUR::T Technology, Engineering, Agriculture, Industrial processes::TB Technology: general issues
    Language: German
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  • 92
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    Neuartige Drehgelenke für reibungsarme Mechanismen : Auslegungskriterien und Berechnungsmethoden (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In many branches of technology is a need for mechanisms with minimum friction and minimum bearing play. Such mechanisms are neither feasible with conventional hinges nor with hinges from the micro- and nanopositioning. This thesis proposes novel hinges in order to bridge the gap between the precision of micropositioning and the workspace of applications in manufacturing. The proposed implementations are flexure hinges for large displacements and dry slide bearings with friction reduction.
    Keywords: T1-995 ; Festkörpergelenke ; Reibwertglättung ; Drehgelenke ; Trockengleitlager ; Elastica ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 93
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    Chemie für den Maschinenbau. Bd. 2: Organische Chemie für Kraft- und Schmierstoffe, Polymerchemie für Polymerwerkstoffe (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Dieses Buch beinhaltet zunächst eine kurze Einführung in die Organische Chemie. Organische Grundkenntnisse sind die Voraussetzung, um nicht nur Kraftstoffe und Schmierstoffe zu verstehen, sondern im Besonderen die Polymerchemie für Polymerwerkstoffe.Die Vorlesung ""Polymerwerkstoffe"" wird im Maschinenbaustudium in einem höheren Semester angeboten.Allgemeine chemische Grundkenntnisse für Chemie im Nebenfach findet man im Buch 1 ""Chemie für Maschinenbau - Anorganische Chemie für Werkstoffe und Verfahren"".
    Keywords: T1-995 ; Organische Chemie ; Polymerchemie ; Polymerwerkstoffe ; Schmierstoffe ; Kraftstoffe ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 94
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    Supraleitende koplanare Mikrowellenfilter für radioastronomische Empfänger bei 15 K (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In dieser Arbeit wird die anwendungsorientierte Entwicklung von Empfangsfiltern für das Radioteleskop des Max Planck Institutes für Radioastronomie (MPIfR) in Effelsberg vorge-stellt. Dort bestand großes Interesse an Bandpassfiltern für das 21 cm bzw. 11 cm Band, die bei radioastronomischen Polarisationsmessungen zum Einsatz kommen sollen. Für beide Bänder sind jeweils zwei zirkularpolarisierte Empfangskanäle auf ein Polarimeter geschaltet, das eine Empfängerrauschtemperatur von ca. 5 K besitzt. Die schmalbandigen Vorfilter für jeden einzelnen Kanal sollen daher im Durchlassbereich eine extrem kleine Dämpfung und möglichst identische Übertragungscharakteristiken (Streuparameter) bei einer Betriebstemperatur von 15 K aufweisen. Dabei soll dieses Ergebnis ohne jegliche nachträgliche mechanische Abstimmung, wie z. B. durch die Verwendung keramischer Schrauben, erreicht werden. Für die spätere Endmontage auf einem Kaltfinger im Hochvakuum, wird zudem ein möglichst hoher Grad an Miniaturisierung der einzelnen Bandpässe angestrebt, um die Packungsdichte des Komplettsystems zu erhöhen. Neben der notwendigen Filtersynthese, um die geforderten Übertragungscharakteristiken zu erreichen, werden die benötigten Materialien mit ihren Eigenschaften beschrieben, mittels derer die elektrischen Anforderungen der konzipierten Netzwerke erfüllt werden können. Darüber hinaus werden die Bauelemente, um das Ziel einer hohen Integration der einzelnen Bandpässe zu erreichen, und die Entwicklung sowie Auslegung koplanarer Leitungsresonatoren in Mäanderform für den modularen Aufbau der Bandpässe vorgestellt. Mit den gewonnenen Resultaten aus Simulationen und insbesondere Mes-sungen an realisierten Filterexemplaren schließt diese Arbeit.
    Keywords: T1-995 ; Mikrowellenfilter ; Kryoelektronik ; Radioastronomie ; Koplanarleitung ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 95
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    Hybride Dünnschichtphotovoltaik auf der Basis von Cu(In,Ga)Se2 und organischen Halbleitern (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In dieser Arbeit wurden hybride Bauelementarchitekturen für effiziente Dünnschichtsolarzellen konzipiert, experimentell realisiert und charakterisiert. Neben hybriden Konzepten für flüssig prozessierbare Elektrodensysteme wurden vor allem Ansätze verfolgt, hocheffiziente Kupfer-Indium-Gallium-Diselenid-Absorber mit perspektivisch druckbaren organischen Halbleitern sowohl in Einzel- als auch in Tandem-Solarzellen zu kombinieren.
    Keywords: T1-995 ; Organische Halbleiter ; Polymersolarzellen ; Nanotechnologie ; Photovoltaik ; CIGS ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 96
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    Hybride Funkkanalmodellierung für ultrabreitbandige MIMO-Systeme (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In diesem Buch werden die Eigenschaften des ultrabreitbandigen und richtungsaufgelößten Funkkanals umfassend analysiert. Auf Basis von strahlenoptischen Verfahren werden zwei hybride Modellierungsansätze vorgeschlagen, welche die Streuprozesse im Funkkanal nachbilden. Die Modelle werden mit Messungen verifiziert und in Systemsimulationen eines MIMO-UWB Kommunikationssystems eingesetzt. Anhand dieser Simulationen wird der Leitfaden zum Design von Antennenarrays für solche Systeme abgeleitet.
    Keywords: T1-995 ; Kanalmodellierung ; UWB ; Mehrantennensysteme ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 97
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    Numerische Berechnung der Tragfähigkeit und der Steifigkeit von querzugverstärkten Verbindungen mit stiftförmigen Verbindungsmitteln (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Holz im Verbindungsbereich neigt zum Spalten, wenn Verbindungen mit mehreren Verbindungsmitteln sowie mit geringen Abständen der Verbindungsmittel untereinander ausgeführt werden. Spalten des Holzes kann jedoch verhindert werden, wenn das Holz im Verbindungsbereich mit selbstbohrenden Holzschrauben verstärkt wird. Diese Arbeit stellt verschiedene Methoden dar, wie das Tragverhalten spaltgefährdeter und verstärkter Verbindungen mit Hilfe der Finite-Elemente-Methode erfasst werden kann.
    Keywords: T1-995 ; Verstärkungen ; Holzbau ; Verbindungen ; selbstbohrende Holzschrauben ; Ingenieurholzbau ; FEM im Holzbau ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 98
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    Design and Experimental Investigation of a Second Harmonic 20 kW Class 28 GHz Gyrotron for Evaluation of New Emitter Technologies (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: Gyrotrons are high-power mm-wave tubes. Here, the design, construction and experimental investigation of a 20 kW, 28 GHz gyrotron (2nd harmonic) are reported. This tube was designed to evaluate new emitters for future highly efficient and reliable fusion gyrotrons and for material processing applications. Following experimental results have been achieved in CW operation: 22.5 kW output power at 23.4 kV electron beam voltage and 2.23 A beam current with the world record efficiency of 43 %.
    Keywords: T1-995 ; Microwave-Materials-Processing ; Wirkungsgrad ; Efficiency ; Kernfusion ; Emitter-Technologien ; Nuclear-Fusion ; Emitter-Technologies ; Gyrotron ; MikrowellenmaterialprozesstechnikGyrotron ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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  • 99
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    Vergrößerung des Sehfeldes der Röntgen-Phasenkontrast-Bildgebung für die klinische Anwendung (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: X-ray phase contrast imaging is a highly promising technology for the clinical diagnostic. Particularly high demands are placed on the required X-ray gratings, as the core element of this method. Such gratings can be fabricated using LIGA-technology, where the structured area is currently limited to a few centimeters in the diagonal (e.g. 10 cm). In this work possibilities to enlarge the area of X-ray gratings, as they are required for the Talbot-Lau Interferometry, were developed and analyzed.
    Keywords: T1-995 ; Kacheln ; Talbot-Lau Interferometry ; Röntgengitter ; Talbot-Lau Interferometrie ; Röntgenbildgebung ; LIGA-Technik ; tiling ; LIGA-technology ; X-ray gratings ; X-ray imaging ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: German
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  • 100
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    Mapping and Localization in Urban Environments Using Cameras (2021)
    KIT Scientific Publishing
    Details
    Publication Date: 2023-12-21
    Description: In this work we present a system to fully automatically create a highly accurate visual feature map from image data aquired from within a moving vehicle. Moreover, a system for high precision self localization is presented. Furthermore, we present a method to automatically learn a visual descriptor. The map relative self localization is centimeter accurate and allows autonomous driving.
    Keywords: T1-995 ; Maschinelles Sehen ; Lokalisierung ; Kartierung ; Autonomes Fahren ; bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues
    Language: English
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