Webbasierte, visuelle Exploration von Regesten deutsch-römischer Könige

Auf dem Online-Portal der Regesta Imperii stellt die Akademie der Wissenschaften und Literatur Mainz einen umfangreichen Datensatz von urkundlichen und historiographischen Quellen der deutsch-römischen Könige von den Karolingern bis zu Maximilian I. zur Verfügung. Teil dieser Regestendatenbank ist eine Regestensuche mit einer zusätzlichen Expertensuche. Analysen haben gezeigt, dass die zur Verfügung gestellten Möglichkeiten zur Suche jedoch nicht optimal ausgeschöpft werden. Aus diesen Grund wird in dieser Arbeit ein Visualisierungsansatz vorgestellt, welcher den Zugang zu den Regesten weiter verbessert, indem Nutzern der Regesta Imperii die Möglichkeit gegeben wird, mit Hilfe einer interaktiven Visualisierung die Ergebnismenge leichter zu explorieren und einzuschränken

LensBar - Visualization for Browsing and Filtering Large Lists of Data

We propose a simple and powerful graphical interface tool called the LensBar for filtering and visualizing large lists of data. Browsing and querying are the most important tasks in retrieving information and LensBar integrates the two techniques into a simple scroll window with slider. While it looks familiar to users of conventional graphical interface tools, its filtering and zooming features offer sophisticated handling of large lists of textual data

Using information visualization techniques to support web service discovery

The increasing number of web services published over the Web highlights the need for an effective method for users to find appropriate web services. Existing web service discovery methods do not effectively aid a user in finding suitable web services. The current methods provide textual lists of web services that the user is required to explore and manually evaluate. Thus, these methods lead to time-consuming and ineffective web service discovery. The aim of this research was to investigate using information visualization (IV) techniques to effectively support web service discovery. The node-and-link network IV technique was selected as the most appropriate IV technique to visualize web service collections. A prototype, called SerViz, was developed as a tool for interactive visualization of web service collections incorporating the node-and-link IV technique and an alphabetical list-based technique. SerViz used the Programmable Web web service collection as the sample web service collection. A usability evaluation was conducted to compare these techniques. Ninety percent of participants preferred the network IV technique for visualizing web service collections. The network IV technique was also faster for browsing. Several usability problems were identified with the network IV technique. This motivated a need for implementing an alternative IV technique in SerViz. The node-and-link tree IV technique was selected as it was more structured than the network IV technique. A usability evaluation was conducted to compare the network and tree IV techniques. Participants slightly preferred the tree IV technique as the technique to visualize web service collections. The tree IV technique was faster for browsing the web service collection while the network IV technique was faster for searching and filtering. This research has determined that IV techniques can be used to effectively support web service discovery. Future work will involve using IV techniques to support collaborative web service discovery. Keywords: Web Service Discovery, Information Visualization, Web Service Collections, Information Visualization Techniques