Abstract A perfectly collimated beam can be spread out by multiple scattering, creating a speckle pattern and increasing the étendue of system. Standard optical systems conserve étendue, thus are unable to reverse process transforming into or, equivalently, sharp focus. Wavefront shaping is technique that able manipulate amplitude and/or phase light beam, controlling its propagation through suc...

For the observer at infinity, a Schwarzschild black hole serves as an attractive opaque disk with radius of $$3\,\sqrt 3 M$$ that will produce diffraction pattern gravitational waves (GWs). In this study, we demonstrate bright spot, which is effect analogous to Poisson-Arago spot in optics, appear when ingoing (quasi-)plane GW diffracted by hole. Here, propose GWs described exact solution using...

Quasi-static rule-based network models used to calculate capillary dominated multiphase transport properties in porous media employ equilibrium fluid saturation distributions which assume that pores are fully filled with a single bulk fluid with other fluids present only as wetting and/or spreading films. We show that for drainage dominated three-phase displacements in which a non-wetting fluid...

The 'pop out' of a distinctive element embedded in a regular pattern, and the 'filling in' of a blind spot, are dramatic manifestations of the way context affects visual perception. Recent studies shed light on the neurophysiological bases of these phenomena.

In a series of experiments, we demonstrate the effects of two spatially distinct primers on motion induction (MI) and the influence of attribute characteristics on the resulting collision site. MI means that a primer such as a spot produces a motion sensation in a subsequently presented geometrical pattern such as a line or a rectangle. This pattern will appear to grow out of the spot. In the p...

Fluorescence imaging through a turbid layer holds great promise for various biophotonics applications. Conventional wavefront shaping techniques aim to create and scan a focus spot through the turbid layer. Finding the correct input wavefront without direct access to the target plane remains a critical challenge. In this paper, we explore a new strategy for imaging through turbid layer with a l...

In slow-growing Escherichia coli cells the chromosome is organized with its left (L) and right (R) arms lying separated in opposite halves of the nucleoid and with the origin (O) in-between, giving the pattern L-O-R. During replication one of the arms has to pass the other to obtain the same organization in the daughter cells: L-O-R L-O-R. To determine the movement of arms during segregation si...