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Introduction
Current institution
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March 2012 - present
Publications
Publications (49)
Microblogging services, such as Twitter, offer a variety
of interactive features that allow users to engage with
contacts in their social network and the content they produce.
One such feature is the favourite button on Twitter,
an icon in the form of a star that users can click on to
assign a special status to a particular tweet. Despite evidence...
Social Media (SM) has become a valuable information source to many in diverse situations. In IR, research has focused on real-time aspects and as such little is known about how long SM content is of value to users, if and how often it is re-accessed, the strategies people employ to re-access and if difficulties are experienced while doing so. We pr...
A fundamental tenet of democracy is that political parties present policy alternatives, such that the public can participate in the decision-making process. Parties, however, strategically control public discussion by emphasising topics that they believe will highlight their strengths in voters’ minds. Political strategy has been studied for decade...
Recent research has shown how strongly connected Wikipedia and other web applications are. For example , search engines rely heavily on surfacing Wikipedia links to satisfy their users' information needs and volunteer-created Wikipedia content frequently gets re-used on social media platforms like Reddit. However, publicly accessible datasets that...
Structural linguistic features are often overlooked yet potentially important aspects of journalistic practice. Especially in news reporting on climate change, these features can play a crucial role as the proper use of language is tied to message credibility, processing fluency and knowledge retention, which can positively influence the reader to...
Climate change is a dynamic and rapidly evolving media agenda. First associated with scientific notions of the greenhouse effect, it was later presented as global warming before reaching the current and broader picture of climate change. Over its development, climate change reporting has touched on a broad range of topics reflecting shifting scient...
Mathematics education is like many scientific disciplines witnessing an increase in scientific output. Examining and reviewing every paper in an area in detail are time-consuming, making comprehensive reviews a challenging task. Unsupervised machine learning algorithms like topic models have become increasingly popular in recent years. Their abilit...
Recent research has shown how strongly Wikipedia and other web services or platforms are connected. For example, search engines rely heavily on surfacing Wikipedia links to satisfy their users' information needs and volunteer-created Wikipedia content frequently gets re-used on other social media platforms like Reddit. However, publicly accessible...
Recent research has shown how strongly Wikipedia and other web services or platforms are connected. For example, search engines rely heavily on surfacing Wikipedia links to satisfy their users' information needs and volunteer-created Wikipedia content frequently gets re-used on other social media platforms like Reddit. However, publicly accessible...
Wikipedia is one of the most important sources of encyclopedic knowledge and among the most visited websites on the internet. As a peer-produced knowledge repository, Wikipedia is dependent on its community of contributors. A healthy contributor community and a steady stream of new editors from diverse backgrounds are especially vital for the platf...
Due to advances in natural language understanding, chatbots have become popular for assisting users in various tasks, for example, searching. Chatbots allow natural-language queries, which can be useful in case of complex information needs, and they provide a higher level of interactivity by displaying information in a dialog-like format. However,...
Today’s smartphone users often use several mobile messaging services alongside each other, even though they typically offer the same features and functionality. Where previous studies have focused on how and why users permanently abandon mobile messaging services and switch to new ones, this study examines the degree to which smartphone users keep...
The Scandinavian countries are often seen as a unity. However, during the COVID-19 pandemic striking differences on how the countries approached the crisis became evident. This quantitative-ethnographic (QE) study aimed to understand political and cultural similarities and differences between the three Scandinavian countries – Denmark, Norway and S...
Topic model of technology in mathematics education
Today's smartphone users often use several mobile messaging services alongside each other, even though they typically offer the same features and functionality. Where previous studies have focused on how and why users permanently abandon mobile messaging services and switch to new ones, this study examines the degree to which smartphone users keep...
Due to advances in natural language understanding, chat-bots have become popular for assisting users in various tasks, for example , searching. Chatbots allow natural-language queries, which can be useful in case of complex information needs, and they provide a higher level of interactivity by displaying information in a dialog-like format. However...
Health experts and government authorities' actions to combat the coronavirus outbreak are strongly compromised by the misinfor-mation infodemic that evolved in parallel to the COVID-19 pandemic. When people get misled by unscientific and unsubstantiated claims regarding the origin or cures for COVID-19, public health response efforts get undermined...
Given the important role of Wikipedia in our everyday lives, a better understanding of how language skills affect Wikipedia usage is needed. If content is not available in a reader’s native language or a language that she can readily understand, access barriers and knowledge gaps are created, threatening Wikimedia’s goal to create knowledge equity...
The Scandinavian countries are often seen as a unity. However, during the COVID-19 pandemic striking differences on how the countries approached the crisis became evident. This quantitative-ethnographic (QE) study aimed to understand political and cultural similarities and differences between the three Scandinavian countries-Denmark, Norway and Swe...
Authorship attribution (AA) is concerned with the task of finding out about the true authorship of a disputed text based on a set of documents of known authorship. In this paper, we investigate the potential of Bootstrap Consensus Networks (BCN) – a novel approach to generate visualizations in stylometry by mapping similarities of authorial style b...
Authorship attribution (AA) is concerned with the task of finding out about the true authorship of a disputed text based on a set of documents of known authorship. In this paper, we investigate the potential of Bootstrap Consensus Networks (BCN)-a novel approach to generate visualizations in stylometry by mapping similarities of au-thorial style be...
This pilot study proposes the use of so-called stimulus material during interviews for requirements elicitation as part of the design process of a digital archive. Designing complex systems like digital archives is not straightforward as users of these systems have specific needs and tasks that designers need to be aware of before the implementatio...
We investigate the TREC-CDS 2016 test collections as a new resource for citation context and citation-based IR experiments. The collection contains more than 1.25 million biomedical full-text articles in XML. We find that a citation index can easily be extracted, and citation contexts easily be identified. We conduct initial experiments to determin...
In this study, we pair different perspectives on information sharing held by the information behaviour and computational social science communities. By reflecting on different conceptual models of sharing (two-actor vs three-actor model) and applying methods from social network analysis and text mining, we investigate the influence that different u...
Returning to previously viewed or possessed information-re-finding-is a core information seeking behaviour that has been studied in diverse contexts including physical environments, personal computer filing systems, web search and email. Despite being designed for real-time and ephemeral content, recent studies have shown that re-finding of older c...
While much is known about how Twitter is used for specific tasks or by particular groups of users, we understand surprisingly little about how the service is used generally on a daily basis. To learn more about general Twitter behaviour we perform a cluster analysis on a rich set of longitudinal interaction log data describing interactions 44 users...
We present an approach that uses human computation and crowdsourcing principles for encoding large amounts of monophonic, handwritten sheet music.
http://nbn-resolving.de/urn:nbn:de:bvb:12-babs2-0000007812
Der Beitrag plädiert für Social Media (social media) als Untersuchungsgegenstand der Informationsverhaltensforschung. Dabei wird vorgestellt, welche Charakteristika mit Facebook, Twitter und Co. als Informationsquellen verbunden sind, welche Fragestellungen für die Informationsverhaltensforschung im Kontext von social media relevant sind und welche...
While social networking and microblogging platforms have received considerable research attention, little work has been done to understand how users preserve, manage and re-access content they acquire from these sources. In this paper we present initial analyses of a large-scale survey (n=606) to understand Personal Information Management (PIM) pra...
The following PhD project argues for analyzing Personal In-formation Management (PIM) behaviour on social networks and microblogging platforms, such as Twitter, as such ser-vices go far beyond their expected usage and have grown a viable source of information to many users. Of the three main information interaction activities that characterise PIM...
While social networking and microblogging platforms have received considerable research attention, little work has been done to understand how users preserve, manage and reaccess content they acquire from these sources. In this paper we present initial analyses of a large-scale survey (n=606) to understand Personal Information Management (PIM) prac...
Microblogging services, such as Twitter, offer a variety of interactive features that allow users to engage with contacts in their social network and the content they produce. One such feature is the favourite button on Twitter, an icon in the form of a star that users can click on to assign a special status to a particular tweet. Despite evidence...
We present a web-based tool for evaluating the information architecture of a website. The tool allows the use of crowdsourcing platforms like Amazon's MTurk as a means for recruiting test persons, and to conduct asynchronous remote navigation stress tests (cf. Instone 2000). We also report on an evaluation study which compares our tool-based crowds...
Dieser Beitrag stellt den Multi/Touch/Device MindMapper (MTD MindMapper) vor: eine Mind-Mapping-Umgebung aus Smartphones und Tabletop- System. In einen digitalen Prozess zur kreativen Ideenfindung werden bekannte Metaphern der analogen Welt in ein Natural User Interface (NUI) integriert. Anhand der Ergebnisse einer ersten Evaluation der prototypisc...
This article investigates how crowdsourcing services (specifically Amazon Mechanical Turk and Crowdflower) combined with web based asynchronous remote usability tools can be utilized for the evaluation of website characteristics. In practice, the information architecture of websites is evaluated employing the navigation stress test. This evaluation...
Der Beitrag zeigt auf, wie Crowdsourcing-Verfahren für asynchronous remote usability testing einge-
setzt werden können. Das konkrete Szenario hierfür ist die Untersuchung der Informationsarchitektur
(IA) von Websites mit Hilfe des Tree-Test und des Navigations-Stress-Test. Für beide Methoden wur-
den Crowdsourcing-kompatible Online-Verfahren entwi...
Fünf kommerzielle und freie Systeme zum automatischen Zusammenfassen von englischen Texten werden hinsichtlich ihrer Summarizing-Leistung vergleichend evaluiert. Hierfür notwendige, fremde und eigene Evaluations-Ressourcen werden vorgestellt und diskutiert sowie Auswahlkriterien für verwendete Summarizer und Evaluationsmaße dargestellt.
Im vorliegenden Beitrag wird eine empirische Studie vorgestellt, in der auf der Basis der im Internet Archive (Wayback Machine) verfügbaren historischen Fassungen von Websites strukturelle Entwicklungen im Website-Design nachgezeichnet werden. Dazu wird das von Ivory & Megraw 2005 vorgestellte Modell des Website-Designs adaptiert und auf eine Stich...
Die vorliegende Arbeit untersucht auf empirische Weise die historische Entwicklung der Webtypografie im Kontext einer Designgeschichte der Web-Interfaces. Als Ausgangsbasis dient dabei eine zuvor bereits selbst durchgeführte Studie, die die Webauftritte von 15 größeren Softwarefirmen über einen Zeitraum von zwölf Jahren (1996-2007) auf deren struk...
