Unterstützung des Editierens von Graphen in Visuellen Repräsentationen

The goal of this thesis is to provide solutions for supporting the direct editing of graphs in visual representations for analyzing graphs. For that, a conceptual view on the user's tasks is established first. On this basis, several novel approaches to "visually edit" the different data aspects of graphs - the graph's structure and associated attribute values - are introduced. Thereby, different visual graph representations suitable for communicating the data are considered.Das Ziel der vorliegenden Dissertation ist, Lösungen zur Unterstützung des direkten Editierens von Graphen in visuellen Repräsentationen zur Analyse von Graphen bereitzustellen. Dafür wird zunächst eine konzeptuelle Sicht auf die Aufgaben des Nutzers entwickelt. Auf dieser Basis werden anschließend mehrere neue Verfahren eingeführt, welche das "visuelle Editieren" der verschiedenen Datenaspekte von Graphen - der Struktur sowie dazu assoziierte Attributwerte - ermöglichen. Dabei werden verschiedene visuelle Graphrepräsentationen berücksichtigt, welche die Daten in geeigneter Form kommunizieren

Interaction Design for Mixed-Focus Collaboration in Cross-Device Environments

The proliferation of interactive technologies has resulted in a multitude of form factors for computer devices, such as tablets and phones, and large tabletop and wall displays. Investigating how these devices may be used together as Cross-Device Environments (XDEs) to facilitate collaboration is an active area of research in Human Computer Interaction (HCI) and Computer-Supported Cooperative Work (CSCW). The research community has explored the role of personal and shared devices in supporting group work and has introduced a number of cross-device interaction techniques to enable interaction among devices in an XDE. However, there is little understanding of how the interface design of those techniques may change the way people conduct collaboration, which, in turn, could influence the outcome of the activity. This thesis studies the impact of cross-device interaction techniques on collaborative processes. In particular, I investigated how interface design of cross-device interaction techniques may impact communication and coordination during group work. First, I studied the impact of two specific cross-device interaction techniques on collaboration in an XDE comprised of tablets and a tabletop. The findings confirmed that the choice of interaction techniques mattered when it came to facilitating both independent and joint work periods during group work. The study contributes knowledge towards problematizing the impact of cross-device interaction techniques on collaboration in HCI research. This early work gave rise to deeper questions regarding coordination in cross-device transfer and leveraging that to support the flexibility of work periods in collaborative activities. Consequently, I explored a range of interface design choices that varied the degree of synchronicity in coordinating data transfer across two devices. Additionally, I studied the impact of those interface designs on collaborative processes. My findings resulted in design considerations as well as adapting a synchronicity framework to articulate the impact of cross-device transfer techniques on collaboration. While performing the two research projects, I identified a need for a tool to articulate the impact of specific user interface elements on collaboration. Through a series of case studies, I developed a visual framework that researchers can use as a formative and summative method to understand if a given interaction technique hinders or supports collaboration in the specific task context. I discuss the contributions of my work to the field of HCI, design implications beyond the environments studied, and future research directions to build on and extend my findings

Virtual Heritage

Virtual heritage has been explained as virtual reality applied to cultural heritage, but this definition only scratches the surface of the fascinating applications, tools and challenges of this fast-changing interdisciplinary field. This book provides an accessible but concise edited coverage of the main topics, tools and issues in virtual heritage. Leading international scholars have provided chapters to explain current issues in accuracy and precision; challenges in adopting advanced animation techniques; shows how archaeological learning can be developed in Minecraft; they propose mixed reality is conceptual rather than just technical; they explore how useful Linked Open Data can be for art history; explain how accessible photogrammetry can be but also ethical and practical issues for applying at scale; provide insight into how to provide interaction in museums involving the wider public; and describe issues in evaluating virtual heritage projects not often addressed even in scholarly papers. The book will be of particular interest to students and scholars in museum studies, digital archaeology, heritage studies, architectural history and modelling, virtual environments

Virtual Heritage

Virtual heritage has been explained as virtual reality applied to cultural heritage, but this definition only scratches the surface of the fascinating applications, tools and challenges of this fast-changing interdisciplinary field. This book provides an accessible but concise edited coverage of the main topics, tools and issues in virtual heritage. Leading international scholars have provided chapters to explain current issues in accuracy and precision; challenges in adopting advanced animation techniques; shows how archaeological learning can be developed in Minecraft; they propose mixed reality is conceptual rather than just technical; they explore how useful Linked Open Data can be for art history; explain how accessible photogrammetry can be but also ethical and practical issues for applying at scale; provide insight into how to provide interaction in museums involving the wider public; and describe issues in evaluating virtual heritage projects not often addressed even in scholarly papers. The book will be of particular interest to students and scholars in museum studies, digital archaeology, heritage studies, architectural history and modelling, virtual environments