Lecture 4 Flashcards
How to calculate similarity of two utterances?
The conceptual recurrence visualization system
StoryTracker
main features
Giving an overview of persistent news themes
Themes can be filtered by duration and theme connectivity using the filtering capabilities of the system.
The user can reduce clutter in the news landscape by minimizing edge crossings.
Wordle disadvantages
Word Sizing Is Naïve
Color is meaningless
Word count is not specific enough
How does wordle place the words?
Randomized greedy algorithm
There are two strategies:
Center-line and alphabetical center-line
Clustering is also possible (each word tries to go to near last placed word in its cluster)
TopicPanorama steps
What is optimal graph matching?
Non‐consistent matching if considering pair‐wise matching first matching G1,G2 then G2, G3 is not the same as directly matching G1,G3
solution: optimal graph matching such that all transitive relations are consistent
Major feature of topicPanorama
The major feature of this visualization is that it combines a radially stacked tree visualization with a density-based graph visualization to facilitate the examination of the matched topic graph from multiple perspectives
EventCueing: What is the concept of framing?
A process in which communicators act (consciously or unconsciously) to construct a point of view that encourages facts to be interpreted by others in a particular manner.
How does EventCueing work?
we present a visual analytics framework for event cueing using streaming media data. As discourse develops over time, our framework applies a time series intervention model which tests to see if the level of framing is different before or after a given date. If the model indicates that the times before and after are statistically significantly different, this cues an analyst to explore related datasets to help enhance their understanding of what (if any) events may have triggered these changes in discourse.
