Format results
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Monte Carlo Field-Theoretic Simulations Applied to Block Copolymer Melts
Mark Matsen - University of Waterloo
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Transition Pathways Connecting Stable and Metastable Phases
An-Chang Shi - McMaster University
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Building Colloidal Crystals in Anisotropic Media
Colin Denniston - Western University
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Predicting plasticity with soft vibrational modes: from dislocations to glasses
Joerg Rottler - University of British Columbia
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Circumferential gap propagation in an anisotropic elastic bacterial sacculus
Andrew Rutenberg - Dalhousie University
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Polymer translocation : alternative driving forces
Gary Slater - University of Ottawa
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The viscoelastic properties of the nematode C. elegans
Matilda Backholm - McMaster University
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Monte Carlo Field-Theoretic Simulations Applied to Block Copolymer Melts
Mark Matsen - University of Waterloo
Monte Carlo field-theoretic simulations (MC-FTS) are performed on melts of symmetric diblock copolymer for invariant polymerization indexes extending down to experimentally relevant values of N=10 4. The simulations are performed with a fluctuating composition field, W -( r), and a pressure field, W… -
Transition Pathways Connecting Stable and Metastable Phases
An-Chang Shi - McMaster University
Phase transitions are ubiquitous in nature. Understanding the kinetic pathways of phase transitions has been a challenging problem in physics and physical chemistry. From a thermodynamics point of view, the kinetics of phase transitions is dictated by the characteristics of the free energy landscape… -
Building Colloidal Crystals in Anisotropic Media
Colin Denniston - Western University
Colloids in a liquid crystal matrix exhibit very anisotropic interactions. Further, these interactions can be altered by both properties of the colloid and of the liquid crystal. This gives a potential for creating specific colloidal aggregates and crystals by manipulating the interactions between… -
Modelling Materials Microstructure Across Scales using Phase Field Methods
Nikolas Provatas - McGill University
Phase field crystal models and their recent extension will be summarized. Their application to non-equilibrium kinetics and phase transformations in materials will be reviewed. In particular, we review new results from applications of this modeling paradigm to solute trapping during rapid… -
Predicting plasticity with soft vibrational modes: from dislocations to glasses
Joerg Rottler - University of British Columbia
We show how to utilize soft modes in the vibrational spectrum as a universal tool for the identification of defects in solids. Perfect crystals with isolated dislocations exhibit single phonon modes that localize at the dislocation core, and their polarization pattern predicts the motion of atoms… -
Circumferential gap propagation in an anisotropic elastic bacterial sacculus
Andrew Rutenberg - Dalhousie University
We have modelled stress concentration around small gaps in anisotropic elastic sheets, corresponding to the peptidoglycan sacculus of bacterial cells, under loading corresponding to the effects of turgor pressure in rod-shaped bacteria. We find that under normal conditions the stress concentration… -
Slow Melting and Fast Crystals
This talk will focus on the behavior of colloidal crystals, and will describe both the nucleation and growth of crystals and their melting. The nucleation and growth of colloidal crystals is experimentally observed to be much faster than expected theoretically or through simulation. The discrepancy… -
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Inferring the spatiotemporal DNA replication program from noisy data
In eukaryotic organisms, DNA replication is initiated at “origins,” launching “forks” that spread bidirectionally to replicate the genome. The distribution and firing rate of these origins and the fork progression velocity form the “replication program.” With Antoine Baker, I generalize a stochastic… -
Dynamics of the magnetic disc in nematic liquid crystal under the action of magnetic field
Alena Antipova - Western University
We simulated Ni disc immersed in a liquid crystal using a lattice Boltzmann algorithm for liquid crystals. In the absence of external torques discs with homeotropic anchoring align with their surface normal parallel to the director of the nematic liquid crystal. In the presence of a weak magnetic… -
The viscoelastic properties of the nematode C. elegans
Matilda Backholm - McMaster University
Undulatory motion is utilized by crawlers and swimmers such as snakes and sperm at length scales spanning more than seven orders of magnitude. The understanding of this highly efficient form of locomotion requires an experimental characterisation of the passive material properties of the organism as…