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09:30 to 10:00 |
Shashi Thutupalli (NCBS, Bengaluru, India) |
TBA |
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10:00 to 10:30 |
Ambarish Ghosh (IISc, Bengaluru, India) |
TBA |
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10:30 to 11:00 |
Vijaykumar Krishnamurthy (ICTS-TIFR, Bengaluru, India) |
Active geometrodynamics predicts the emergence of cytokinesis Cell division accomplishes the segregation of genetic material and involves remarkable changes in the cellular geometry culminating in cytokinesis: the cleavage of a mother cell giving rise to two daughter cells. Cytokinesis in animal cells is driven by flows resulting from cortical tension gradients in the actomyosin cortex. Here, we combine a theory for the active geometrodynamics of the cortical surface and quantitative measurements in the \textit{C. elegans} zygote to reveal the physical principles of cytokinesis. At high activity, we observe the spontaneous emergence of ring-like patterns of myosin concentration and cell shape in the theory. The constriction dynamics of this self-organized pattern agrees with the ingression of the cytokinetic furrow and concomitant myosin accumulation during the first division in the C elegans embryo. Through RNAi perturbations, we quantitatively test our theoretical predictions of myosin accumulation rates linearly varying with the ingression rate, and the emergence of asymmetric ingression. Our work suggests that the self-organised geometrodynamics of active fluid surfaces underlies cytokinesis.
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11:30 to 12:00 |
Mahesh Panchagnula (IIT Madras, India) |
Dynamics of Dense Human Crowds This talk will discuss the collective dynamics of human crowds, combining mathematical modelling, simulations, and experiments to understand dense crowd motion, congestion, stampedes and evacuation. The talk will seek to showcase how individual interactions produce emergent large-scale crowd behaviour, leading to scientifically grounded crowd-management strategies for dense gatherings.
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12:00 to 12:30 |
Rama Govindarajan (ICTS-TIFR, Bengaluru, India) |
Streaks in varying viscosity Streamwise streaks are ubiquitous in near-wall turbulence. After recalling why, we will discuss a new mode of streak formation due to variations in viscosity. We will talk about why we should care.
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12:30 to 13:00 |
Animangsu Ghatak (IIT Kanpur, India) |
Confinement Induced Alteration of Surface energy and Consequent Changes in Morphologies of Complex Emulsion When a liquid layer is trapped between two parallel plates with surfaces that can be wetted, it results in the formation of a concave meniscus, which is essentially a curved interface between the liquid and the surrounding air. This meniscus gives rise to a pressure difference known as the Laplace pressure, which is associated with the liquid's surface tension. This pressure difference causes a reduction in pressure on the liquid side of the meniscus, below the atmospheric pressure. This phenomenon raises the question of how such pressure changes within the bulk liquid might impact the energetics of an interface submerged within it, such as the interface between two liquids in an emulsion or between a solid and a liquid in a dispersion of particles. In this talk I will discuss experiments performed at liquid-liquid and liquid-solid interfaces, both submerged within a third liquid. In particular we have examined how this phenomenon can alter complex emulsion morphology and also adsorption of micro-particles on an oil-water interface.
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13:00 to 13:15 |
Anupam Gupta, Raghunath Chelakkot, S Ganga Prasath |
Flash Talks |
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14:00 to 15:30 |
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Poster session |
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16:00 to 16:30 |
L Mahadevan (Harvard University, Cambridge, USA) |
Shape and song from a sheet Artists can create a dragon from a sheet of paper, or a melody from a saw or a steel drum. I will discuss the mathematics and physics underlying these creations that mix the mundane and the arcane in search of the sublime.
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16:30 to 17:30 |
Devang Khakhar, Rahul Pandit, Madan Rao, Srikanth Sastry, L Mahadevan, Rama Govindarajan |
Panel discussion |
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