Untitled from Cohen Group on Vimeo.
Shown is a video of the types of insect flight movies we capture with our fast video camera and the fidelity with which our Hull Reconstruction Motion Tracking method is able to extract the wing and body motions of the insects.
Dance of Scales from Redshift Productions on Vimeo.
In collaboration with Redshift productions and Maren Waldman, we created a mixed media dance presentation on motion at different length scales.
Here a colloidal crystal freezes onto a square lattice template. The video is sped up by a factor of about 20.
Have you ever had a leaky faucet.... drip,drip,drip. Here is what is looks like at 10,000 frames per second. Using a fast camera (Phantom 7.1), we are able to image fluids breaking into droplets at more than 100,000 frames per second.
This video explains why we are interested in studying mosquitoes.
This is a you tube video that explains our insect flight work to the lay public.
This is a youtube video that explains our fligth research to students at the junior high and high school levels.
This movie shows the break-up of a lyotropic surfactant in the lamellar phase. The break-up is symmetrip about the minimum radius and no satellite drops are formed. The frame rate is 20,000 f.p.s.
Fluorescence movie of human knee cartilage under shear. The cartilage is stained green, then photobleached, to allow for calculation of strains and displacements, and in turn for calculations of local moduli. Notice that the upper region, close to the articular surface, is much more compliant than the bulk.
Bilayer colloidal crystal composed of ~1 micron silica colloids with a sticky "depletion" interaction. The colloidal particles that are not part of the crystal can be seen diffusing around.
