Computations in Science Seminars
Jul 2015
29
Wed 12:15
Shiladitya Banerjee, University of Chicago
e-mail:
Host: Leo Kadanoff ()
Organizer: Ivo Peters ()
How bacteria couple cell shape to growth and division

How cells maintain stable shapes and sizes through the cycles of birth and replication poses a fundamental question at the interface of physics and modern biology. Recent technological advances in single cell imaging have yielded unprecedented amounts of quantitative information about the shapes of single bacteria as they grow and divide. These single-cell studies are generating tremendous interest because they reveal unanticipated relationships between cell shape, growth rate and the timing of division events. To understand these relationships, we developed a general theoretical framework from a principle of minimal energy dissipation that relates cell geometry to the kinetics of growth and division. The model accounts for counterintuitive dependencies between growth and shape and gives rise to predictions that we verify in our experimental studies of the bacterium Caulobacter crescentus. In particular we describe how mechanical stresses regulate cell wall growth and drive shape transitions during cell wall constriction. Using our theoretical model and experimental data we further establish that cell growth and constriction are both driven by the synthesis of new cell wall material and are thus controlled by a single timescale. Our work brings new perspectives on how shapes of bacteria can impact their growth and survival.

Aug 2015
5
Wed 12:15
Radha Ramachandran, Eve Tulbert, University of Chicago, Freedom Games
e-mail:
Organizer: Kim Weirich ()
'Creating a learning ecosystem for k-12 students'

Planet Lab is a network for hands-on STEM, SCIENCE, TECHNOLOGY, ENGINEERING AND MEDICINE exploration and learning. Radha Ramachandran (Physics PhD 2014, Science Education and Outreach Coordinator MRSEC & RDCEP) and Eve Tulbert (literacy and learning researcher) will describe how they decided to co-found an educational technology start-up dedicated to expanding opportunities for STEM education and engagement. In the first part of the talk, Ramachandran and Tulbert will describe the technology start-up process. Then, they will describe the current research around learning in the concept called "STEM Ecosystems," and discuss ideas with the group for creating learning pathways for K-12 students.

Aug 2015
12
Wed 12:15
Stephane Perrard, University of Chicago
e-mail:
Host: William Irvine ()
Organizer: Sayantan Majumdar ()
Aug 2015
19
Wed 12:15
Sayantan Majumdar, University of Chicago
e-mail:
Host: Leo Kadanoff ()
Organizer: Shiladitya Banerjee ()
Aug 2015
26
Wed 12:15
Kim Weirich, University of Chicago
e-mail:
Host: Leo Kadanoff ()
Organizer: Ivo Peters ()
Sep 2015
30
Wed 12:15
Sarah Cobey, University of Chicago
e-mail:
Host: Michael Rust ()
Oct 2015
7
Wed 12:15
Zvonimir Dogic, Brandeis University
e-mail:
Host: William Irvine ()
Oct 2015
14
Wed 12:15
Michael Oppenheimer, Princeton
e-mail:
Host: Leo Kadanoff ()
Oct 2015
21
Wed 12:15
Kathleen Stebe, University of Pennsylvania
e-mail:
Host: Leo Kadanoff ()
Oct 2015
28
Wed 12:15
Tom Lubensky, University of Pennsylvania
e-mail:
Host: Leo Kadanoff ()
Nov 2015
4
Wed 12:15
Eric Siggia, Rockefeller University
e-mail:
Host: Greg Voth
Nov 2015
11
Wed 12:15
David Schuster, University of Chicago
e-mail:
Host: Leo Kadanoff ()
Nov 2015
18
Wed 12:15
Daniel Rothman, MIT
e-mail:
Host: Leo Kadanoff ()
Earth-System Stability through Geologic Time
Dec 2015
2
Wed 12:15
OPEN
Dec 2015
9
Wed 12:15
Charles Kane, University of Pennsylvania
e-mail:
Host: Leo Kadanoff ()
Dec 2015
16
Wed 12:15
Jeremie Palacci, New York University
e-mail:
Host: William Irvine ()
Jan 2016
5
Tue 4:00 PM
Seth Lloyd, MIT
e-mail:
JFI COLLOQUIUM - ROOM W301 - 4:00 PM
Jan 2016
6
Wed 12:15
Seth Lloyd, MIT
e-mail:
Host: Leo Kadanoff ()
Jan 2016
13
Wed 12:15
Eleni Katifori, University of Pennsylvania
e-mail:
Host: David Biron ()
Jan 2016
20
Wed 12:15
OPEN
Jan 2016
27
Wed 12:15
Jeffrey Harvey, University of Chicago
e-mail:
Host: Daniel Holz ()
Feb 2016
3
Wed 12:15
OPEN
Feb 2016
10
Wed 12:15
Mark Bowick, Syracuse University
e-mail:
Host: William Irvine ()
Feb 2016
17
Wed 12:15
Chris Fang-Yen, University of Pennsylvania
e-mail:
Host: David Biron ()
Feb 2016
24
Wed 12:15
OPEN
Mar 2016
2
Wed 12:15
OPEN
Mar 2016
9
Wed 12:15
John Novembre, University of Chicago
e-mail:
Host: Leo Kadanoff ()
Mar 2016
16
Wed 12:15
Randy H. Ewoldt, University of Illinois Urbana-Champain
e-mail:
Host: Leo P. Kadanoff ()
Mar 2016
30
Wed 12:15
OPEN
Apr 2016
6
Wed 12:15
OPEN
Apr 2016
13
Wed 12:15
OPEN
Apr 2016
20
Wed 12:15
OPEN
Apr 2016
27
Wed 12:15
OPEN
May 2016
4
Wed 12:15
OPEN
May 2016
11
Wed 12:15
OPEN
May 2016
18
Wed 12:15
OPEN
May 2016
25
Wed 12:15
OPEN
Jun 2016
1
Wed 12:15
OPEN
Jun 2016
8
Wed 12:15
OPEN