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Case's Research
I have prepared a brief summary of my recent work on the Wigner-Ville Distribution, and other time-frequency representations, available here. These new methods add temporal and frequency resolution to the standard spectrogram representations, especially for seismic signals which are transient and non-stationary by nature.
The paper and presentation from the July 2004 ANCER conference in Honolulu are available here. Other presentations will be posted here as I make them available.
The long-awaited Millikan Library paper has been published:
http://resolver.caltech.edu/CaltechEERL:EERL-2004-03I am working on various projects with Professor Tom Heaton in the Civil Engineering department at Caltech. A lot of them have been revolving around Caltech's Millikan Library.
Some of my recent animation results can be seen at my movies page. The stick animation movies are mainly results from a set of forced vibration tests that were performed on Millikan Library by Javier Favela, John Clinton, and myself. There is a shaker installed on the roof, and these tests involved forcing the building in previously identified "interesting frequencies" and gathering the data from the seismic station MIK located on the 9th floor, as well as the dense instrumentation network throughout the building. I can then make plots of the results and create movies that represent the behaviour of the building!
Another work in progress involves observing changes in the behaviour of Millikan Library based on weather patterns. This picture is a 3-D summary of two months of data from Millikan Library (one-hour FFT slices, from the EW component of station MIK, trimmed to show the response near the first E-W mode as measured from ambient vibrations, from January 1 2003 +60days):
I have also been involved with the COMET site, which is now offline?
I think that is enough for now, thanks for stopping by!
