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Market-driven harvesting of non-timber forest products and the governance of communal forests in the south-east lowveld of Zimbabwe
(kassel university press, 2023)
Despite forests providing a wide range of important products and services for much of Zimbabwe’s population, natural forests are threatened by deforestation. The highest rates of deforestation occur in communal forests. Communal forest resources in Zimbabwe show evidence of increased degradation and signs of a breakdown of local institutions for resources management. These signs of a breakdown of local institutions are coupled with evidence of a lack of any emerging alternative institutions for conservation of forest ...
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Modeling Static Grid Equivalent with Artificial Neural Networks Including Optimally Designed Local Reactive Power Control
(kassel university press, 2024)
During the energy system transition, the rapid increase in distributed energy resources (DERs) can cause grid congestion problems in power grids, such as voltage problems and overloads. It has become increasingly important to intelligently control the provision of reactive power from DERs to power grids, which not only stabilizes voltage, reduces loading and grid losses, but also provides reactive power flexibility to different points in power grids. As power grids are interconnected and operated by different grid ...
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Zur fernmesstechnischen Quantifizierung von Methanleckagen in Biogasanlagen mittels Sensordatenfusion infrarotoptischer Messsysteme
(kassel university press, 2023)
Diese Arbeit behandelt die Problemstellung der fernmesstechnischen Quantifizierung von Methanleckagen mit dem Anwendungsfall von Leckagen in Biogasanlagen. Im Rahmen dieser Arbeit wurde ein Messverfahren und ein Messsystem entwickelt, womit eine fernmesstechnische Quantifizierung von Methanleckagen ermöglicht wird. Das Messmodell zur Fusion der Sensordaten wurde hergeleitet und es wurden die getroffenen Annahmen und die notwendigen Randbedingungen betrachtet. Das entwickelte Messsystem wird vorgestellt und die ...
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Organic Computing
(kassel university press, 2024)
The Organic Computing Doctoral Dissertation Colloquium (OC-DDC) series is part of the Organic Computing initiative [4] which is steered by a Special Interest Group of the German Society of Computer Science (Gesellschaft für Informatik e.V.). It provides an environment for PhD students who have their research focus within the broader Organic Computing (OC) community to discuss their PhD project and current trends in the corresponding research areas. This includes, for instance, research in the context of Autonomic ...
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On the Impact of Non-Optimal Parameters in Additive Manufacturing - From Microstructure to Mechanical Properties
(kassel university press, 2024)
The additive manufacturing with its layerwise built-up comprises a variety of tempting properties such as an unprecedented freedom of design and tailorable mechanical properties. Amongst others, the laser-based powder bed fusion of metals (PBF-LB/M) as one representative additive manufacturing process permits the production of highly complex parts requiring a minimum of post-processing effort. As the additive manufacturing techniques are still rather new, there are still several open questions concerning the ...
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Design, Control, and Harmonic Compensation for Stand-Alone and Grid-Connected Voltage-Source Converters: Simulation and Experimental Validations
(kassel university press, 2024)
Voltage source converters (VSCs), among other power converters, play a crucial role in supplying power to both local loads and the grid at the PCC. During standalone operation, VSCs ensure stable power for loads by regulating the output voltage. In grid-connected mode, the regulation shifts to controlling output current, such as converter side current (CSC) or grid side current (GSC), to inject sinusoidal current into the electrical grid. The nonlinear characteristics of the loads connected to the power converters ...
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De primera mano
(kassel university press, 2021)
Las entrevistas aquí presentadas ofrecen incursiones en el mundo que significa "La Arquitectura de la Revolución Cubana" a través de relatos siempre "de primera mano": siempre personales, siempre tal como vividos, siempre tal como sentidos e integrados en una visión del momento, del pasado y el futuro. Quienes hablan son arquitectos, principalmente arquitectos proyectistas, pero también arquitectos dedicados a la enseñanza universitaria y a la reflexión histórica y teórica de la arquitectura. Toman la palabra arquitectos ...
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Vegane Öko-Lebensmittel aus Sicht von Verbrauchern mit unterschiedlichen Ernährungsstilen
(kassel university press, 2021)
Die vorliegende Arbeit zielt darauf ab, die Kaufmotive und Einstellungen von Öko-Konsumenten mit unterschiedlichen Ernährungsstilen zu veganen Lebensmitteln zu ermitteln. Ein Schwerpunkt liegt dabei darauf, Unterschiede zu identifizieren, die aus den Ernährungsstilen der Verbraucher resultieren. Die Unterschiede sollen in Bezug auf die folgenden Fragestellungen untersucht werden:
- Wie nehmen Öko-Verbraucher vegane Lebensmittel wahr?
- Aus welchen Gründen werden vegane Lebensmittel gekauft?
- Welche veganen Produkte ...
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FachWerk
(kassel university press, 2020)
Der digitale Wandel führt zu einem stetigen Veränderungsprozess in Wirtschaft und Gesellschaft. Allerdings partizipiert die Handwerksbranche durch den hohen Grad manueller Tätigkeiten und spezifischer Herausforderungen bisher eher wenig vom Megatrend Digitalisierung. Um die Wettbewerbsfähigkeit aufrechterhalten zu können und Erfolge zu gewährleisten, sollten die neu entstandenen digitalen Chancen zukünftig auch im Handwerk genutzt werden. Es können digitale Technologien eingesetzt werden, um Prozesse und unternehmerische ...
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Numerical analysis of invariant manifolds characterized by quasi-periodic oscillations of nonlinear systems
(kassel university press, 2021)
Quasi-periodic motions systematically occur, when a system is subjected to multiple unrelated excitation mechanisms. Since unrelated mechanisms generically exhibit in dependent frequencies, the resulting motion is characterized by multiple fundamental frequencies. Consequently, the resulting motion is not periodic, but, due to the inde pendent frequencies, sort of periodic, namely quasi-periodic. Not being able to identify one unique fundamental frequency, established methods for the identification of periodic ...