Rolling at Small Scales

Turbulence Effects at Small Scales

It is most natural to assume that mysterious Small Ionized and Neutral Structures (SINS) in diffuse ISM arise from turbulence. There are two obvious problem with such an explanation, however. First of all, it is generally believed that at the small scales turbulence should be damped. Second, turbulence with Kolmogorov spectrum cannot be the responsible for the SINS. We consider, however, effect...

Plasticity Theory at Small Scales

Is Nonhelical Hydromagnetic Turbulence Peaked at Small Scales?

Nonhelical hydromagnetic turbulence without an imposed magnetic field is considered in the case where the magnetic Prandtl number is unity. The magnetic field is entirely due to dynamo action. The magnetic energy spectrum peaks at a wavenumber of about 5 times the minimum wavenumber in the domain, and not at the resistive scale, as has previously been argued. Throughout the inertial range, the ...

Collaborative control design strategies for robotic systems at small scales

Micro-technologies have enabled several technological breakthroughs in electronics and mechanics thanks to the development of the so-called microsystems. For a widespread development and use of microsystems, flexible and accurate robots able to do manipulation, characterization and assembly tasks at the micro-scale (1μm-1mm) are required. Actual robots are flexible and accurate but they are cle...

Strong Clustering of Faint Galaxies at Small Angular Scales

The 2-point angular correlation function of galaxies, ω(θ) , has been computed on equatorial fields observed with the CTIO 4m prime focus, within a total area of 2.31 deg. In the magnitude range 19 ≤ mR ≤ 21.5, corresponding to < z >≈ 0.35, we find an excess of power in ω(θ) at scales 2 ≤ θ ≤ 6 over what would be expected from an extrapolation of ω(θ) measured at larger θ. The significance of t...