We recently published a visualization dashboard for exploring Coronavirus (COVID-19) case progression. Our dashboard allows viewers to select a target region to see how similar the region's case progressions are to all other regions reporting data. Users can also view estimates of when regions' case curves may 'bend' and begin to flatten. Dynamic time warping Dynamic time warping (DTW) and four parameter logistic regression (4PL) are used to generate our estimates. Standard case progression graphs and worldwide maps of case counts are also provided for additional context.
We have recently updated our web application for visualizing tweet sentiment. Recent tweets are requested based on user-chosen keywords. An estimate of each tweet's sentiment is made from its text. The results are visualized in numerous ways: in an emotional scatterplot with horizontal pleasure and vertical arousal axes, clustered by topic, in a heatmap that counts tweets by sentiment bins, as a tag cloud of frequent terms, as a timeline of when tweets were posted, as a map of where tweets were posted, and as a list of tweets and their associated sentiment measurements.
![]() Perception |
![]() Multivariate |
![]() Engagement |
![]() Text |
![]() Navigation |
![]() Mixed Initiative |
![]() Ensemble |
![]() Data Analytics |
![]() Election |
![]() Marine Biology |
![]() Astrophysics |
![]() Football |
I am investigating visualization techniques that support rapid, accurate, and effective exploration and analysis of large, complex, multivariate datasets. Many of our approaches harness visual perception. This allows much of the analysis to be performed automatically by the low-level visual system. Research in an area of cognitive psychology known as preattentive processing forms the foundation for our perceptual guidelines. A detailed overview of preattentive processing is available for those who are interested.
A full list of publications is available, with links to citation information, abstracts, and PDF for most of the papers. A PDF version of my CV is also available. Some of our recent publications include the following.
- Visualizing Static Ensembles for Effective Shape and Data Comparison. Hao, et al., VDA 2016.
- Effective Visualization of Temporal Ensembles. Hao, et al., TVCG 2015.
- Ensemble Visualization for Cyber Situation Awareness of Network Security Data. Hao, et al., VizSec 2015.
- Attention and Visual Memory in Visualization and Computer Graphics. Healey & Enns, TVCG 2012.
If you want to schedule a meeting with me, please check my calendar for availability, then email me so I can confirm the time is still open.
PhD.
Kornelia
Bastin,
Kelvin
Cheng
Nisan
Chhetri,
Shailaja
Mallick
MS.
A complete list of past students is also available.
![]() CSC 600, Graduate Orientation F 12:50-1:40  1025/1230 EB-II |
![]() IAA 501, Introduction to Visualization Summer 2016, Institute for Advanced Analytics |
![]() IAA 502, Text Analytics Fall 2016, Institute for Advanced Analytics |
![]() IAA 502, Visualization Tools Fall 2016, Institute for Advanced Analytics |
![]() IAA 502, Python Fall 2016, Institute for Advanced Analytics |
![]() IAA 502, GIS Fall 2016, Institute for Advanced Analytics |