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DTSTART:19510909T010000
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TZOFFSETTO:+0900
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UID:calendar.22098.field_date.0@appserver-34d18a14
DTSTAMP:20190615T232536Z
CREATED:20190111T042031Z
DESCRIPTION:.... Date\n\nTuesday, January 15, 2019 - 09:00 to 10:00 ....
Description\n\n*Abstract:*\n\nCapturing the nonlinear dynamics of animal b
ehavior with Applications to the Nematode C. elegans\n\n From microorgani
sms to humans, animals behave by making complex changes in their shape a
nd posture over time with remarkable exibility. To deal with the complexi
ty of animal behavior existing analysis methods view it as a discrete tim
e process, which is composed of transitions between a nite number of ste
reotyped motifs, such as walking or reaching. This viewpoint, however,
ignores the fact that most behavior is not stereotyped. There is, theref
ore, a need for a perspective that captures the continuous complexity of
animal behavior and oers detailed insights into general principles under
lying its generation and control. In my Ph.D. thesis, I propose a new a
pproach of analyzing animal behavior, based on the idea that it is funda
mentally a continuous time spatiotemporal dynamical system. I develop met
hods to transform behavioral recordings into a geometrical object called
the 'behavioral state space'. As an organism moves, the corresponding be
havioral state traces out a continuous trajectory in the state space, su
ch that the geometry and topology of the trajectories encode quantitative
and qualitative properties of behavior. Finally, I characterize an organ
ism's behavioral dynamics in terms of the topological invariants estimate
d from the local Jacobians of the state space trajectories. The invariant
s capture essential aspects of a dynamical system, such as the number of
degrees of freedom, symmetries in the governing equations of motion, a
nd measures of predictability and variability. I use the tools and concep
ts developed the above to perform a detailed characterization of continuo
us dynamics of freely behaving C. elegans worms.
DTSTART;TZID=Asia/Tokyo:20190115T090000
DTEND;TZID=Asia/Tokyo:20190115T100000
LAST-MODIFIED:20190111T060448Z
SUMMARY:[PhD Thesis Presentation] -Tosif Ahamed- Capturing the nonlinear dy
namics of animal behavior with Applications to the Nematode C. elegans
URL;TYPE=URI:https://groups.oist.jp/grad/event/phd-thesis-presentation-tosi
f-ahamed-capturing-nonlinear-dynamics-animal-behavior
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