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Now showing items 971-980 of 1025
Dissertation
New Approaches for the Quantification of Metabolic and Economic Trade-Offs Related to the Health and Longevity of Individual Dairy Cows
(2024)
Background: In dairy cows, negative associations between the genetic merit for milk yield and fitness traits as well as a lack of success in lowering the prevalence of production diseases have been noticed over the past 30 years across different production methods, herd sizes and countries. On the other hand, individual farms and individual cows within a farm succeed in simultaneously achieving high performance, low prevalence and high profitability, while others cannot cope with these challenges. Differences in milk ...
Dissertation
Drivers for Fostering Agroforestry Systems in Temperate and Mediterranean Climates: Past, Present, and Future
(2024)
Traditional multifunctional agroforestry landscapes provide not only food but also support biodiversity and provide a multitude of ecosystem services. However, such landscapes have been frequently lost in the last decades. Given the multiple global challenges that have emerged from an industrial model of agriculture, agroforestry as a concept based on multifunctionality is increasingly regarded as key for sustainable food production systems of the future. To guide future land management and policies, past land-use ...
Bachelorarbeit
Bewertung der Anwendbarkeit von Single-Well Push-Pull Tracer-tests zur Bestimmung von Porosität und Dispersivität bei geringen hydraulischen Gradienten und in Brunnen mit großem Durchmesser
(2024)
Diese Arbeit beschäftigt sich konkret mit der Fragestellung, ob und inwieweit der Single-Well Push-Pull Tracertest als Methode für die Herleitung der Porosität und Dispersivität eines Grundwasser-leiters anwendbar ist, wenn nur ein sehr niedriger hydraulischer Gradient und dagegen jedoch ein großes Bohrlochvolumen vorausgesetzt sind.
Leap & Kaplan (1988) entwickelten eine analytische Methode, um die Fließgeschwindigkeit des Grundwassers mithilfe eines Single-Well Push-Pull Tracertests zu ermitteln. Hall et al. (1991) ...
Aufsatz
The potential of mangrove as a food source in Riau
(2023-12-28)
Mangrove fruit has been utilized as a food by people in several regions in Indonesia, especially as traditional food. Information about the potential and benefits of mangrove fruit is still limited. There is not much information regarding physico-chemical properties of mangrove fruit as a potential food source. This study aims to gather and review various scientific information related to the potential of mangrove fruit and its use as foodstuff. This information can be used as a basis to conduct further research ...
Aufsatz
Performance of pacu (Colossoma macropomum) fed varying dietary inclusion levels of fish visceral and duckweed (Lemna minor) as replacement for fish and soybean meals
(2024-01-23)
The performance of Colossoma macropomum subjected to a six-month feeding trial using duckweed (Lemna minor) and fish visceral as partial replacements for soybean meal and fishmeal respectively was evaluated in this study. A total of one thousand five hundred (1500) nearly same sizes (average size 45 g) juveniles of C. macropomum were sourced from the nearby research man-made lake and subjected to proper acclimatisation for two weeks prior to the commencement of the feeding trial. One hundred (100) juveniles per ...
Dissertation
Community-Resilience und Bürgerbeteiligung
(2023)
Ziel dieser Arbeit ist es, anhand der Forschungsfragen dieser Grundlagenstudie einen Zusammenhang von Community Resilience und Bürgerbeteiligung nachzuweisen und den Weg zur weiteren Diskussion multipler Resilienz bzw. multiresilienter Gesellschaften zu eröffnen. Im theoretischen Teil der Arbeit wurden anhand der untersuchten Fachliteratur in ausgewählten Richtungen der Resilienzforschung keine Verbindungen zur Bürgerbeteiligung festgestellt. Ebenso zeigen die untersuchten Handbücher und Leitlinien zur Bürgerbeteiligung ...
Dissertation
Analysis of agricultural landscape transformation and cropping system diversification in southern Myanmar
(2023)
Myanmar's forests are rich in biodiversity and have significant potential for carbon reduction. Kyunsu Township in southern Myanmar is still covered by biodiverse tropical evergreen rainforests on the highlands and mangroves on the coastline, conserving carbon stocks. However, the expansion of croplands into these forests to meet the growing demand for food and crop income is a major driver of deforestation and loss of carbon sinks. Thus, balancing agricultural land use and natural resource conservation is vital for ...
Aufsatz
Effects of blending poly(lactic acid) and thermoplastic polyester polyurethanes on the mechanical and adhesive properties in two-component injection molding
(2022-09-16)
One possible way to increase the use of bioplastics and thus contribute to a more resource-efficient and sustainable economy is to broaden the application range of such bioplastics. Poly(lactic acid) (PLA) is a promising and commercially available bio-based and biologically degradable polymer, which exhibits a high strength and stiffness but is very brittle. Blending with other polymers can lead to an enhancement of the ductility of the PLA. The goal of this work was to show that blending of PLA with a bio-based ...
Aufsatz
Process Influences in the Combined Compacting and Back-Injection Process to Produce Back-Injected Self-Reinforced Composites (SRCs) – Analysis via Multiple Regression Modelling
(2021-11-21)
A new process to produce back-injected self-reinforced composites (SRCs) is presented. In contrast to other investigations on back-injection of SRCs, a process is presented which allows compacting and back injection of SRCs in one step where the SRCs are partly consolidated only via melt pressure inside the cavity. The mechanical properties of SRCs depend to a large extent on the process parameters of temperature and pressure during manufacture. These parameters are not yet known for back-injected areas. Sensors ...