It is shown that the toy Turing Tumble, suitably extended with an infinitely long game board and unlimited supply of pieces, Turing-Complete. This achieved via direct simulation a machine. Unlike previously informally presented constructions, we do not encode finite control many times, need only one trigger/ball-hopper pair, prove our construction correct. We believe this first natural extensio...

In this work we introduce a stochastic model to describe directional changes in the movement of swimming bacteria. We use the probability density function (PDF) of turn angles, measured on tumbling wild-type E. coli, to build a Langevin equation for the deflection of the bacterial body swimming in isotropic media. We have solved this equation analytically by means of the Green function method a...

In the present work we simulate the basic two-dimensional dynamics of swarming E. coli bacteria on the surface of a moderately soft agar plate. Individual bacteria are modelled by self-propelled ridged bodies (agents), which interact with each other only through inelastic collision and with the highly viscous environment through damping forces. The motion of single agents is modelled closely co...

Exposure to androgens during prenatal development shapes both physiological and behavioral developmental trajectories. Notably, in rhesus macaques, prenatal androgen exposure has been shown to increase rough-and-tumble play, a prominent behavioral feature in males during the juvenile period in primates. While macaques are an Old World, polygamous species with marked sexually dimorphic behavior,...

Cells of Escherichia coli under conditions of certain cellular stresses excrete attractants. Cells of chemotactic strains respond to these excreted signaling molecules by moving up their local concentration gradients and forming different types of stable multicellular structures. Multicellular clusters are the simplest among these structures. Fluorescence microscopy was used to characterize the...

We propose a method to exactly generate bridge run-and-tumble trajectories that are constrained start at the origin with given velocity and return after fixed time another velocity. The extends concept of effective Langevin equations, valid for Markovian stochastic processes such as Brownian motion, non-Markovian process driven by telegraphic noise, exponentially decaying correlations. obtain s...

A deep, water-soluble cavitand extracts n-alkanes and other water-insoluble species into its cavity via hydrophobic forces: alkanes bind in a helical manner, and tumble rapidly on the NMR timescale inside the binding pocket.

The current study demonstrates an experimental investigation of the tumble flow structures using Particle Image Velocimetry (PIV) under steady-state conditions considering the central vertical tumble plane. The experiments were carried out on a four-valve, pent-roof Gasoline Direct Injection (GDI) engine head at different valve lifts and with a pressure difference of 150 mmH2O across the intake...