Browsing by Author "Angerbauer, Katrin"

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Open Access
Exploring simplified subtitles to support spoken language understanding
(2018) Angerbauer, Katrin
Understanding spoken language is a crucial skill we need throughout our lives. Yet, it can be difficult for various reasons, especially for those who are hard-of-hearing or just learning to speak a language. Captions or subtitles are a common means to make spoken information accessible. Verbatim transcriptions of talks or lectures are often cumbersome to read, as we generally speak faster than we read. Thus, subtitles are often edited to improve their readability, either manually or automatically. This thesis explores the automatic summarization of sentences and employs the method of sentence compression by deletion with recurrent neural networks. We tackle the task of sentence compression from different directions. On one hand, we look at a technical solution for the problem. On the other hand, we look at the human-centered perspective by investigating the effect of compressed subtitles on comprehension and cognitive load in a user study. Thus, the contribution is twofold: We present a neural network model for sentence compression and the results of a user study evaluating the concept of simplified subtitles. Regarding the technical aspect 60 different configurations of the model were tested. The best-scoring models achieved results comparable to state of the art approaches. We use a Sequence to Sequence architecture together with a compression ratio parameter to control the resulting compression ratio. Thereby, a compression ratio accuracy of 42.1 % was received for the best-scoring model configuration, which can be used as baseline for future experiments in that direction. Results from the 30 participants of the user study show that shortened subtitles could be enough to foster comprehension, but result in higher cognitive load. Based on that feedback we gathered design suggestions to improve future implementations in respect to their usability. Overall, this thesis provides insights on the technological side as well as from the end-user perspective to contribute to an easier access to spoken language.
Open Access
Investigating the effect of priming on reading performance on electronic devices
(2015) Angerbauer, Katrin
Reading is an activity needed almost everywhere in daily life. Through reading we are not only able to extract meaning from a text, but also to extend our knowledge of the world and to foster other cognitive abilities. In the age of information technology, reading behav-iour has been subject to change. With more information made accessible through the inter-net and e-reading devices, the time spent reading increases. Further, it is reported that read-ing on computers and other electronic devices tends to be shallower and abilities like browsing over a document to get the gist of its content become more important. In this thesis we want to investigate the usage of text visualizations to facilitate the reading activities on electronic devices, with special focus on reading comprehension. We want to make use of the memory psychological "priming effect" by presenting the reader with a visualization of the text's content before the actual reading activity, and thus giving the opportunity to get familiar with the information contained in the text prior to reading. To create those visualizations we developed a first prototype, which is capable of extracting keywords of a text and visualizing them. Additionally, we present certain important design aspects of text visualizations, which were discovered through a preliminary study. The presented concepts were evaluated in a user study and are considered as a starting point for future research. With the contributions of this work we aim to support readers with reading activities. Facilitated reading could help to lower the hurdle to read more and therefore foster the gain of knowledge.
Open Access
Vergleich von Plattformen zur Unterstützung der Governance in serviceorientierten Architekturen
(2014) Angerbauer, Katrin; Blehm, Alexander; Kalach, Volha
Mit der immer wichtiger werdenden Kommunikation zwischen Maschinen entstand das Architekturparadigma der service-orientierten-Architektur (SOA). Durch die Verwendung einer SOA im Unternehmen kann man schneller auf geänderte Prozesse und Anforderungen reagieren, jedoch bringen die flexiblen Strukturen einer SOA auch eine erhöhte Komplexität mit sich. SOA Governance soll helfen, Unternehmensziele mit SOA-Zielen in Einklang zu bringen. In dieser Arbeit werden Tools zur Unterstützung der SOA Governance hinsichtlich verschiedener Kriterien untersucht und bewertet.