Archive for July 2010
Data visualization is being used for detecting fraud, especially with respect to wire and credit card transactions. Work done at the Charlotte Visualization Center at UNC Charlotte provides some interesting insights into fraud detection. This work was conducted in collaboration with the Bank of America.In the following paper they highlight four visualization techniques that allow for fraud detection.
Scalable and Interactive Visual Analysis of Financial Wire Transactions for Fraud Detection, Remco Chang, Alvin Lee, Mohammad Ghoniem, Robert Kosara, William Ribarsky, Jing Yang, Evan Suma, Caroline Ziemkiewicz, Daniel Kern, Agus Sudjianto, Journal of Information Visualization (IVS).
Search by example: Find accounts with transactions/activity similar to the current account being monitored.
Strings and beads: A line graph based visualization that shows critical events as ‘beads’ on the graph. The use of a log scale for the y-axis is a neat idea and probably allows for improved exploration.
Keyword graph: A graph visualization showing keyword similarity This paper was based on previous work done by the same group titled Wirevis. I would encourage interested readers in reading the original paper as well as the previous paper (Wirevis).
- It is a web-based solution that allows interactive exploration of data for fraud detection.
- Can read a wide variety of file formats (excel/access databases).
- Allows interaction with visualizations such as node-link diagrams, bar charts etc.
You can check out a 10-min video on their website at http://www.centrifugesystems.com/shadowbox/libraries/mediaplayer/Centrifuge-1.8-for-Banking-Fraud-Analysis.flv. As per the company website, it has been used to detect fraud in Bulgaria called the “Bulgarian Money Mule ring”. Seems like a step in the right direction. It would be interesting to see, if they could save and share workspaces for collaborative exploration of data. With their web-based framework, it would make it particularly interesting for investigators located at different locations to immediately access and interact with the current state of the visualization.
Any other companies, products, research papers that you may have heard of that I missed?
Lately, I have been collecting links to videos of talks related to Data Visualization. I found multiple talks for some people and so have categorized them accordingly. I have also tried to provide some context to the individual/group.
I think the first TED talk by Hans Rosling (@hansrosling) got a lot of media attention and made people sit up and appreciate the power of ‘narrative visualization’. He almost make it look like a sport with him serving as the role of a commentator. The title on TED’s website for the talk is “the best stats you’ve ever seen“. I am not sure about that, but it is a very entertaining talk.
It was followed up by an interesting study by information visualization researchers George Robertson, Roland Fernandez, Danyel Fisher, Bongshin Lee and John Stasko in the Infovis 2008 paper titled “Effectiveness of Animation in Trend Visualization.” Here is an interesting excerpt from the abstract of the paper:
Results indicate that trend animation can be challenging to use even for presentations; while it is the fastest technique for presentation and participants find it enjoyable and exciting, it does lead to many participant errors. Animation is the least effective form for analysis; both static depictions of trends are significantly faster than animation, and the small multiples display is more accurate.
Fernanda Viégas and Martin Wattenberg (@wattenberg) (previously at IBM Research) have brought visualization to the masses in through IBM Many Eyes. They have recently started a new venture called FlowingMedia. Here are some links to their talks:
- TEDxSP 2009 - Fernanda Viégas (in Portuguese with english subtitles)
- Stanford CS Department – Democratizing Visualization (wmv)
Manuel Lima (@mslima) of visualcomplexity.com gave an interesting talk at Made by Many. His talk titled Network Visualization in an Age of Interconnectedness was not only an excellent talk, but ended up starting quite a passionate debate which led to Manuel writing a post titled Information Visualization Manifesto. I urge you to read the post and look at the interesting perspectives that infovis experts in the field had to Manuel’s manifesto. Manuel gave another interesting talk at the Creativity and Technology (CaT) 2009: Information Visualization.
Aaron Koblin (@aaronkoblin) has been involved with creating innovative and evocative data visualization pieces such as the New York Talk Exchange, Radiohead’s House of Cards music video (You can see Aaron in the “Making of House of Cards” video), the very entertaining ‘Bicycle built for 2000‘ project and many others.
Making of House of Cards
Links to a couple of Aaron’s talks are below:
Tom Wujec is a fellow at Autodesk. His talk on 3 ways the brain creates meaning provides an amazing insight into our brain. He addresses issues related to why data visualization works and how the brain visualizes data.
Jeff Heer has developed information visualization tools that can be used by developers around the world for creating interactive visualizations of their own data. He is the authors of Prefuse, Flare (Check out the excellent demos) and most recently, Protovis (many great examples online). Lately, he has published an informative articles in the ACM Queue titled A tour through the visualization zoo - Jeffrey Heer, Michael Bostock, Vadim Ogievetsky. He does a great job interviewing Fernanda Viegas and Martin Wattenberg in the ACM Queue. A talk by him at the Stanford HCI seminar can be found here (html link, wmv).
Nicholas Christakis presents a very fascinating talk where he used social data visualization to explore the influence of social networks – “The hidden influence of social networks.” In his talk he says that spreading of obesity is due to your social network. Smoking and even divorce can be linked to the company you keep.
Please let me know if I have missed any interesting data visualization talks that are available online and I will be happy to update the post.