Polarisation states are described by spin expectation values, known as Stokes parameters, the trajectories of which in a rotationally symmetric system form a sphere named after Poincaré. Here, we show ...

Viscous streaming, an inertial phenomenon, refers to the steady flows that emerge when a fluid oscillates around a localized microfeature. There, stresses are concentrated, remodeling surrounding flow ...

Mesoscopic environments and particles diffusing in them are often studied by tracking such particles individually while their Brownian motion explores their environment. Environments may be, e.g., a ...

There are at least two reasons why one would study the gravitational field of a disk. The first is that many astronomical objects, such as spiral galaxies like the Milky Way, are disk-like. The second ...

Using a highly sensitive particle-tracking scheme, we report an observation of elliptical motion of microparticles driven by a single evanescent field. We show that this behavior is highly tunable and ...

The mechanical properties of a suspension can be dramatically altered by adding a small amount of a secondary fluid that is immiscible with the bulk phase. The substantial changes in the strength of ...

The Penang Education Department should withdraw its circular instructing schools in Penang not to participate in the state-level Merdeka celebration, says Perak DAP vice-chairman A. Sivanesan. He said ...

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