Browsing by Author "Krieger, Christoph"

Filter results by typing the first few letters
Now showing 1 - 3 of 3
  • Thumbnail Image
    ItemOpen Access
    Analysis of the influence of screen size and resolution on work efficiency
    (2014) Klinke, Hermann; Krieger, Christoph; Pickl, Sebastian
    The availability of large high-resolution displays and high-bandwidth digital display interfaces allows us to conduct a user study that compares the effects of a large high-resolution display and smaller displays on productivity and satisfaction for complex office tasks, where we control for pixel density, color, brightness and contrast of the displays using a virtual machine and one single large high-resolution display connected to a single high-end computer. We discuss the advances and current state of display technologies that enable this study and we discuss how our study differs from earlier related work. Participants perform three abstract tasks that simulate complex office work on displays of three different sizes and resolutions but with the same pixel density. Both quantitative and qualitative data has been collected and analyzed. We describe the effects that larger displays have on task completion time, error rate and satisfaction compared to smaller displays. Results indicate that large displays significantly improve productivity of complex office tasks and that users prefer larger displays over smaller displays.
  • Thumbnail Image
    ItemOpen Access
    Evaluation von visuellem In-Situ Feedback mit Assistenzsystemen in der manuellen Montage mit leistungsgeminderten Arbeitern
    (2014) Krieger, Christoph
    Laut Statistiken zur Beschäftigungssituation behinderter Menschen sind in Deutschland rund 3 Millionen Menschen mit Behinderung im erwerbsfähigen Alter. Durch den Beschluss des Nationalen Aktionsplans zur Umsetzung der UN-Behindertenrechtskonvention wurde ein Prozess angestoßen, der die Arbeitswelt und somit auch den Bereich der manuellen Montage maßgeblich beeinflussen wird. Ziel der UN-Behindertenkonvention ist es unter anderem die Teilhabe von leistungsgeminderten Personen am Arbeitsmarkt deutlich zu steigern. Zentrales Thema der Konvention ist das in einem bestimmten Fall erforderliche Anpassen der Gegebenheiten, um zu gewährleisten, dass leistungsgeminderte Menschen gleichberechtigt mit allen anderen Menschen sind und somit alle Grundfreiheiten und Menschenrechte im gleichen Maße genießen können. Darunter fällt auch das technische umgestalten eines Arbeitsplatzes. Ziel dieser Arbeit ist das Entwickeln und Evaluieren verschiedener visueller in-situ Feedbackarten von Assistenzsystemen für leistungsgeminderten Personen während der manuellen Montage. In einer Studie wird gezeigt, dass Leistung und Unabhängigkeit der leistungsgeminderten Arbeiter durch den gezielten Einsatz des Assistenzsystems gesteigert werden können.
  • Thumbnail Image
    ItemOpen Access
    Semantic querying of distributed pattern and solution repositories
    (2018) Krieger, Christoph
    In 1977 Christopher Alexander and his colleagues published their pioneering idea about pattern languages consisting of linked patterns, which are linked human-readable documents that describe proven solutions in a context. Since then patterns and pattern languages have been established in various disciplines, constantly new patterns are created and added to pattern languages. Hence, pattern languages the can be seen as living network of patterns. However contrary to the idea of pattern languages as living networks, most of the pattern languages that exist today are documented in static documents such as books, papers or journals that are hard to change. Moreover, with increasing amount of printed documents, it becomes difficult for pattern users to manual select patterns that suits their use case. We propose a concept of using Semantic Web Standards to describe information about patterns, concrete solutions and their relations in form of linked data on the web. This linked data is a machine-readable representation of pattern and solution languages that can be shared across software systems. Further, we present the concept of an IT-based pattern and solution repository that abstracts the technologies of the semantic web and allows users to publish information about patterns, concrete solutions and their relations in form of RDF data. Furthermore, the pattern repository provides functionalities to retrieve RDF data that describes information about patterns, concrete solutions and their relations from distributed source and visualize the information in human readable documents.