Upcoming Events

TD

TBD by Adam Patch

Jul 31, 2018, 11:00 AM-12:30 PM

Room: 202 Physics Bldg.

Advisor: Prof. Cristina Marchetti, Contact: Yudaisy Salomon Sargenton - phyadmin@syr.edu

TD

Rheology and Collective Behavior in Living Tissues by Michael Czajkowski

Aug 7, 2018, 10:00 AM-11:30 AM

Room: 202 Physics Bldg.

Advisor: Prof. Cristina Marchetti, Contact: Yudaisy Salomon Sargenton - phyadmin@syr.edu

Recent experiments and simulations have indicated that confluent epithelial layers, where there are no gaps or overlaps between the cells, can transition from a floppy fluid-like state to a rigid solid-like state, with dynamics that share many features with glass transitions. While a coherent picture has begun to form connecting the microscopic causes of this transition with the macroscopic observables and expectations, much less is known of its consequences in biological processes. Do tissues tune themselves to a glassy state in order to promote collective motion? Has evolution made use of this behavior in programming the complex steps leading from the embryo to the organism? Here, our recent efforts to answer such questions at the continuum and microscopic level are described in detail. Employing the biophysical vertex model, active confluent groupings of cells are described as polygons with shape-based energies. This same modeling technique played a key role in uncovering the signatures of glassy states in these tissues, and in our first effort we extend the model to include the influence of cell division and cell death. With careful analysis, we are able to refute a recent claim that the presence of such division and death will always eliminate glassiness. We then extend these findings to explore the influence of open boundaries on these tissues, identifying the necessary ingredients for sustained tissue expansion. Finally, we develop a novel hydrodynamic model that describes confluent motile tissues. This development is enabled by the apparent (and unprecedented) existence of a structural order parameter for glassiness in tissues. Our formalism enables investigation of how feedbacks between tissue stiffness and cell migration (which we term “morphotaxis”) lead to pattern formation in confluent tissues. We find that a specific “morphotactic” parameter controls whether a tissue will remain homogeneous or will develop patterns such as asters and bands

TD

TBD by Julian George

Aug 9, 2018, 3:00 PM-4:30 PM

Room: 208 Physics Bldg.

Contact: Yudaisy Salomon Sargenton - phyadmin@syr.edu

S

Physics Department Annual Fall Picnic

Sep 9, 2018, 11:00 AM-3:00 PM

Green Lakes State Park, Reserve Shelter

Contact: Yudaisy Salomón Sargentón, 315-443-5960

Please join us on Sunday, September 9th, 2018 for the Physics Department Fall Picnic at Green Lakes’ Reserve Shelter. There will be food, there will be games, there will be fun!

*Please note that cleanup is starts at 3 pm. Guests are welcome to stay longer if they so wish. Note that this it is a ‘carry-in carry-out park.

C

TBD by Evangeline Downie

Oct 18, 2018, 3:30 PM-4:45 PM

Room: 202/204 Physics Bldg.

Host: Prof. Steven Blusk/ Contact: Yudaisy Salomón Sargentón, 315-443-5960

C

TBD by Kerstin Nordstrom

Apr 25, 2019, 3:30 PM-4:45 PM

Room: 202/204 Physics Bldg.

Host: Prof.Joseph Paulsen/ Contact: Yudaisy Salomón Sargentón, 315-443-5960

CM

TBD by Kerstin Nordstrom

Apr 26, 2019, 11:00 AM-12:00 PM

Room: 202/204 Physics Bldg.

Host: Prof.Joseph Paulsen/ Contact: Yudaisy Salomón Sargentón, 315-443-5960