Professor of Physics
After working in nonlinear dynamics and nonequilibrium pattern formation for many years, my research group has begun studying problems in theoretical neurobiology in collaboration with Professor Richard Mooney's experimental group on birdsong at Duke University. The main scientific question we are interested in is how songbirds learn to sing their song, which is a leading experimental paradigm for the broader neurobiology question of how animals learn behaviors that involve sequences of time. My group is interested in problems arising at the cellular and network levels (as opposed to behavioral levels). One example is understanding the origin, mechanism, and eventually the purpose of highly sparse high-frequency bursts of spikes that are observed in the nucleus HVC of songbird brains (this is the first place where auditory information seems to be combined with motor information). A second example is to understand how auditory and motor information are combined, e.g., there are data that suggests that the same group of neurons that instruct the respiratory and syringeal muscles to produce song (again in nucleus HVC) are also involved in recognizing song. A third example is trying to understand changes in anatomy (increases in spine stability) that were recently observed in living brain tissue as a bird learns its song.
Zoldi, SM, Liu, J, Bajaj, KMS, Greenside, HS, and Ahlers, G. "Extensive Scaling and Nonuniformity of the Karhunen-Loève Decomposition for the Spiral-Defect Chaos State." Full Text
Zoldi, SM, and Greenside, HS. "Comment on "Optimal Periodic Orbits of Chaotic Systems"." Full Text
Chiam, K-H, Lai, M-C, and Greenside, HS. "Efficient Algorithm on a Non-staggered Mesh for Simulating Rayleigh-Benard Convection in a Box." Full Text
Zoldi, SM, and Greenside, HS. "Karhunen-Lo`eve Decomposition of Extensive Chaos." Full Text
O'Hern, CS, Egolf, DA, and Greenside, HS. "Lyapunov spectral analysis of a nonequilibrium Ising-like transition." Full Text
Lai, MC, Chiam, KH, Cross, MC, and Greenside, HS. "Simulating Complex Dynamics In Intermediate And Large-Aspect-Ratio Convection Systems."
Zoldi, SM, and Greenside, HS. "Spatially Localized Unstable Periodic Orbits."