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<p>FYI: today, noon, CS conference room, 1132 Harold Frank Hall<br>
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<td>[FACULTY] PhD Defense - Yun Teng - 7/20/16</td>
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<th align="RIGHT" valign="BASELINE" nowrap="nowrap">Date: </th>
<td>Wed, 13 Jul 2016 14:18:07 -0700</td>
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<th align="RIGHT" valign="BASELINE" nowrap="nowrap">From: </th>
<td>Jillian Title <a class="moz-txt-link-rfc2396E" href="mailto:jillian.title@cs.ucsb.edu"><jillian.title@cs.ucsb.edu></a></td>
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<th align="RIGHT" valign="BASELINE" nowrap="nowrap">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:grads@cs.ucsb.edu">grads@cs.ucsb.edu</a>, <a class="moz-txt-link-abbreviated" href="mailto:faculty@cs.ucsb.edu">faculty@cs.ucsb.edu</a>,
<a class="moz-txt-link-abbreviated" href="mailto:lecturers@cs.ucsb.edu">lecturers@cs.ucsb.edu</a>, <a class="moz-txt-link-abbreviated" href="mailto:research@lists.cs.ucsb.edu">research@lists.cs.ucsb.edu</a>,
<a class="moz-txt-link-abbreviated" href="mailto:colloquia@lists.cs.ucsb.edu">colloquia@lists.cs.ucsb.edu</a></td>
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PhD Defense<br>
<b>Yun Teng</b><br>
Wednesday, July 20th at 12:00pm<br>
HFH 1132<br>
<br>
<b>Committee: </b>Theodore Kim (Co-Chair), Tobias Höllerer
(Co-Chair), Linda Petzold<br>
<br>
<b>Title: </b>Efficient Deformations Using Custom Coordinate
Systems<br>
<br>
<b>Abstract: </b><br>
<br>
Physics-based deformable object simulations have been playing an
increasingly important role in 3D computer graphics. They have
been adopted for humanoid character animations as well as
generating special effects such as fire and explosions. However,
simulations of large, complex systems can consume large amounts of
computation and mostly remain offline, which prohibits their use
for interactive applications.<br>
<br>
We present several highly efficient schemes for deformable object
simulation using custom spatial coordinate systems. Our choices
expand the spectrum of subspace to full space and both Lagrangian
and Eulerian viewpoints.<br>
<br>
Subspace methods achieve massive speedups over their “full space”
counterparts by drastically reducing the degrees of freedom
involved in the simulation. A long standing difficulty in subspace
simulation is incorporating various non-linearities. They
introduce expensive computational bottlenecks and quite often
cause novel deformations that are outside the span of the
subspace.<br>
<br>
We address these issues in articulated deformable body simulations
in a Lagrangian viewpoint. We remove the computational bottleneck
of articulated self-contact handling by deploying a pose-space
cubature scheme, a generalization of the standard “cubature”
approximation. To handle novel deformations caused by arbitrary
external collisions, we introduce a generic approach called
subspace condensation, which activates full space simulation on
the fly when an out-of-basis event is encountered. Our proposed
framework efficiently incorporates various non-linearities and
allows subspace methods to be used in cases where they previously
would not have been considered.<br>
<br>
Deformable solids can interact not only with each other, but also
with fluids. We design a new full space method that achieves a
two-way coupling between deformable solids and an incompressible
fluid where the underlying geometric representation is entirely
Eulerian. No-slip boundary conditions are automatically satisfied
by imposing a global divergence-free condition. We are able to
simulate multiple solids undergoing complex, frictional contact
while simultaneously interacting with a fluid. The complexity of
the scenarios we are able to simulate surpasses those that we have
seen from any previous method.<br>
<br>
Everyone Welcome!<br>
<br>
<img src="cid:part1.674A5BF7.BA7187BC@cs.ucsb.edu" alt=""
height="303" width="422"><br>
<br>
<pre class="moz-signature" cols="72">--
Jillian Title
Graduate Advisor
Department of Computer Science
University of California Santa Barbara
Harold Frank Hall 2104
Santa Barbara, CA 93106-5110
(805) 893-4322</pre>
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