לוח שנה משולב

Collective effects can be observed in pedestrian crowds, during experiments or even in everyday life. In this presentation we use the tools of statistical mechanics to study one of them, namely the formation of diagonal stripes in an intersection of two flows. The elementary building block of the model will be the TASEP. We will combine several TASEP lanes to form an intersection where self-propelled 'pedestrians' will move. In periodic boundary conditions a diagonal pattern well-known from experiments will be observed and shown to emerge from a linear stability analysis of the mean-field equations. With open boundary conditions particles will be shown to self-organize not exactly into diagonals but into 'chevrons', a slightly tilted pattern. We will provide a simple picture of this effect in terms of environment-mediated effective interactions between particles.

Elliptic de Sitter space is a maximally symmetric spacetime that isn't time-orientable. Quantum field theory in this spacetime does not exist globally, but only for individual observers. This provides a working model for Susskind's horizon complementarity principle. I motivate a recipe for translating states and observables between the world-pictures of the different observers. In particular, we recover the thermal state at the cosmological horizon temperature as a state on which all observers agree.

Introducing new applications and workflow enhancements for the C1 Single-Cell Auto Prep System.


Methods for optimum cell preparation and cell qualification for the C1™ Single-Cell Auto Prep System.


Understanding biological heterogeneity with CyTOF-2 Mass Cytometer.

The ability to send a wave to fetch an object from a distance would fulfill many dreams. It was known since Stokes that propagating small-amplitude potential waves only push particles in the direction of propagation. I describe the experiments which show that when waves become three-dimensional as a result of the modulation instability, a floater can be forced to move towards the wave source. The mechanism for this is the generation of surface vortices by waves propagating away from vertically oscillating plungers. That introduces a new conceptual framework for understanding wave-driven flows, which enables us to engineer inward and outward surface jets, stationary vortices, and other complex flows. The results form a new basis for the remote manipulation of objects on fluid surfaces and for a better understanding of the motion of floaters in the ocean, the generation of wave-driven jets, and the formation of Lagrangian coherent structures.