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This paper is grounded in the emerging field of web science and shall contribute to its further classification and demarcation by illustrating the current state of »web-native research methods«. It builds upon an initial arraying work of Richard Rogers, who coined the term »Digital Methods« for research with methods that were »born« in the web, and illustrated and organized them in his eponymous book in 2013. This paper attempts to develop a more appropriate illustration of the Digital Methods by following the web’s very own, hypertextual, network-like nature, in particular by construing an ontological representation on the base of the Web Ontology Language (OWL). By virtue of decomposing the book into granular information units and their subsequent reassembly into OWL entities, immediate access to the entire knowledge domain can be provided, and coherencies, interrelations and distinctions between concepts become apparent. The ontology’s structure was induced narrowly along the provided examples of research projects and subsequently clustered in topic groups, of which the three most important ones were (a) the Digital Methods as an arraying space of web-native methodology, (b) a collection of concrete applications of these Digital Methods in research projects, and (c) a hierarchical scheme of traditional sciences with a distinct interest in answering research questions with help of Digital Methods. Subsequently, the ontology was evaluated in three general dimensions: Deriving user stories and scenarios provided means to validate the utilization quality; the accuracy and reliability of the resulting structure was validated with help of a control group of web-native research projects; and process control instruments served as a validator for the ontology’s correctness. Despite the ontology itself, this paper also resulted in a first interpretation of the produced information: Statements about research practise in social science, politics and philosophy were as possible as findings about commonly applied varieties of methods. Concluding, the present paper proposes a process of ontology engineering, an evaluation of the ontology’s value, and an interpretation of the ontology’s content.
Diese Arbeit untersucht die zeitliche Interpolation von Videosignalen. Durch die
Einführung des Ultra High Definition Television Standard wird eine höhere Bildwiederholrate benötigz um
Judder-Artefakte zu vermeiden. In diesem Zusammenhang kommt der zeitlichen Interpolation von nicht nativem UHD Material eine besondere Bedeutung zu. Neben der räumlichen Interpolation ist diese essenziell. In dieser Arbeit wird eine Übersicht über die Anforderungen an UHD Video gegeben. Bewegungskompensierende
Verfahren für das Deinterlacing und Upscaling in Verbindung mit einer Phasenkorrelation werden behandelt. Ein MATLAB-Programm wird entwickelt mit dem ein Upscaling und Deinterlacing von HD Material durchgeführt werden kann.
The amount of data produced and stored in multiple types of distributed data sources is growing steadily. A crucial factor that determines whether data can be analyzed efficiently is the use of adequate visualizations. Almost simultaneously with the ongoing availability of data numerous types of visualization techniques have emerged. Since ordinary business intelligence users typically lack expert visualization knowledge, the selection and creation of visualizations can be a very time- and knowledge-consuming task. To encounter these problems an architecture that aims at supporting ordinary BI users in the selection of adequate visualizations is developed in this thesis. The basic idea is to automatically provide visualization recommendations based on the concrete BI scenario and formalized visualization knowledge. Ontologies that formalize all relevant knowledge play an important role in the developed architecture and are the key to make the knowledge machine-processable.
Die Regelung heutiger, industriell genutzter Biomasse-Feuerungsanlagen erfolgt meistens über fest eingestellte Parameter. Bei Veränderungen des Brennstoffs dienen visuelle Beobachtungen der Mitarbeiter als Basis der Neueinstellung dieser Parameter. Das Ziel der Forschung besteht in der Optimierung solcher Regelungen durch den Einsatz von Kamerasystemen in Kombination mit einer automatisierten Regelung, die auf Basis von Flammenbild-Analysen funktioniert. Ein solches System wäre auch unabhängig von der Art des Brennstoffs.
Vorlesungsnotizen, Präsentationen, To-do-Listen – und vielleicht auch der eine oder andere Schmierzettel: Wie Studierende lernen, bleibt Dozenten oft verborgen. In Lernportfolios sammeln Studierende solche Dokumente dagegen systematisch. Davon können auch Lehrende profitieren – wenn sie ihre Kursteilnehmer gut anleiten.
Online-measurement systems for agricultural and industrial AD plants – A review and practice test
(2014)
Online-measurement systems for AD plants in general are crucial to allow for detailed and comprehensive process monitoring and provide a basis for the development and practical application of process optimisation and control strategies.
Nevertheless, the online measurement of key process variables such as Volatile Fatty Acids (VFA) and Total Alkalinity (TA) has proven to be difficult due to extreme process conditions. High Total Solids (TS) concentrations and extraneous material often damage the sensors or have a strong negative impact on measurement quality and long-term behaviour.
Consequently, there is a need for new robust and accurate online-measurement systems.
The purpose of this paper is to give an overview of existing online-measurement systems, to present the current state of research and to show the results of practice tests at an agricultural and industrial AD plant. It becomes obvious that a broad variety of measurement solutions have been developed over the past few years, but that the main problem is the upscaling from lab-scale to practical application at full-scale AD plants. Results from the practice tests show that an online-measurement of pH, ORP, TS is possible.