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Mechanism-Based Modeling of Failure and Damage in Thick Multi-Layered Composite Structures
(kassel university press, 2023)
Since the last few years, the usage of unidirectionally fiber-reinforced composite (UD FRC) materials for structural components in the automotive industry is increasing due to definite advantages in comparison to traditional metallic materials. The most important advantage is the weight of this material based on its low density with an accompanying high specific modulus and high a specific strength as well as the adaptability to specific applications. Also, their layer-wise processing into laminates enables the ...
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Projekterfolg bei Infrastrukturprojekten in Deutschland insbesondere bei Straßen und Schienenprojekten
(kassel university press, 2023)
Weltweit sowie in Deutschland leiden Infrastrukturprojekte an massiven Kostensteigerungen, Verzögerungen, Bürokratie und mangelnder Bürgerakzeptanz. Andererseits dienen Infrastrukturprojekte langfristigen strategischen Zielen und sind durch den Klimawandel
herausgefordert.
In dieser Hinsicht widmet sich die vorliegende Arbeit einer Antwort auf drei Hauptfragen:
1) Was ist ein erfolgreiches Infrastrukturprojekt bzw. Verkehrsinfrastrukturprojekt?
2) Wie kann der Projekterfolg von Infrastrukturprojekten bewertet ...
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Organizing for Digital Innovation. Implications for Organizational Forms, Digital Transformation and Digital Innovation Units
(kassel university press, 2023)
This dissertation aims to explore appropriate ways of organizing for digital innovation. It builds on four studies to close knowledge gaps that have recently emerged. First, a longitudinal and holistic analysis of the co-evolution of digital innovations (and their inherent digital technologies) and organizational forms remains lacking, which prevents the use of valuable established knowledge to address emergent challenges and identify important gaps in our understanding. Therefore, the dissertation systematically ...
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Handlungsbroschüre. Privacy by Design am Beispiel der kollaborativen kontextsensitiven NORA-App zur Kommunikationsunterstützung von Wissensarbeit
(kassel university press, 2023)
Die Fachgebiete Kommunikationstechnik mit der Forschungsgruppe ComTec und Öffentliches Recht mit dem Schwerpunkt Recht der Technik und des Umweltschutzes mit der Projektgruppe verfassungsverträgliche Technikgestaltung (provet) der Universität Kassel haben mit Förderung der Deutschen Forschungsgemeinschaft vom 1. Oktober 2020 bis zum 30. November 2022 das Forschungsprojekt „Gestaltung von kollaborativen kontextsensitiven mobilen Anwendungen nach normativen Anforderungen des Datenschutzrechts und der Informatik (NORA)“ ...
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Partizipative Infrastrukturentwicklung in nordhessischen Dorfgemeinschaften
(kassel university press, 2022)
A functioning rural community, diverse club activities or special local traditions. These are familiar to most inhabitants of the rural area. However, these aspects represent quality of rural life only for some, while less appreciated by others. The latter consider infrastructure, which are meant to be added value, a waste of communal funds.
Debating voluntary services and infrastructure of rural areas is a central topic of this dissertation entitled “Participatory development of infrastructure to promote village ...
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Selbstreflexion zwischen psychologischer Theorie und schulischer Praxis
(kassel university press, 2023)
Der vielfach betonten Notwendigkeit für Lehrkräfte sich im professionellen Handeln stetig zu reflektieren und der Forderung diese Fähigkeit bereits in der Lehramtsausbildung anzubahnen, steht die mangelnde Klarheit darüber gegenüber, wie genau sich Selbstreflexion praktisch vollzieht, was sie auslöst und wie sie gefördert werden kann. Die vorliegende Dissertation arbeitet die aktuelle theoretische Konzeptualisierung der Selbstreflexion aus psychologischer Perspektive auf und versucht die Rolle emotionalen Erlebens ...
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Mixed-mode cohesive cracks and complex potentials of linear elastic fracture mechanics: new theoretical aspects and numerical applications
(kassel university press, 2023)
The J-integral is a powerful tool to determine crack tip loading, where the J-integral vector also allows for the quantification of crack deflection applying the J-integral vector criterion. Although originally formulated for sharp cracks with a crack tip singularity, the J-integral vector can also be derived for cracks with cohesive zones. The relation and proof of equivalency of the first coordinate of the vector and the crack tip opening displacement, typically associated with the cohesive zone model, has been ...
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Comparison and investigation of various topography sensors using a multisensor measuring system
(kassel university press, 2022)
With increasing miniaturization and rising demands on the manufacturing accuracy of surface structures in the micro- and nanometer range, the requirements for measurement technology to ensure manufacturing quality also increase. Various tactile and optical measurement techniques are available for this purpose. Since these differ in their transfer behavior, the systematic deviations occurring in height values measured on critical surface structures also differ. The identification of such systematic measurement deviations ...
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Application-Oriented Reactive Power Management in German Distribution Systems Using Distributed Energy Resources
(kassel university press, 2022)
Nowadays, according to the technical connection guidelines in Germany (VDE-AR-N) for distributed energy resources (DERs), a relevant reactive power provision potential can be provided from the existing DERs in the German distribution grids. The German distribution system operators, therefore, could make use of the existing reactive power potential for providing different kinds of ancillary services. In this thesis, an application-oriented reactive power management concept is proposed and discussed. The proposed ...
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A Hybrid Flow-based Intrusion Detection System Incorporating Uncertainty
(kassel university press, 2022)
The advances of today’s cyberattacks threatening network infrastructures are both versatile and alarming. This requires thoroughly planned security solutions to spot malicious behavior in those networks. Systems serving this duty are intrusion detectors commonly relying on deep packet inspection, which come up with high resource consumption because network traffic is observed at a very fine granularity. With increasing link speeds of current and future networks, this situation is becoming a serious affair for operational ...