Dictyostelium discoideum slugs migrating in the absence of external stimuli tend to continue migrating in the original randomly 'chosen' direction. Spontaneous deviations from the starting direction accumulate with time at a rate that measures the 'physiological noise' in the slugs' steering mechanism. Most of the spontaneous turning signals arise in the transduction chain 'downstream' of the c...

We study the accretion flow from a counter-rotating torus orbiting central Kerr black hole (BH). characterize properties at turning point of accreting matter torus, defined by condition $u^\phi = 0$ on torodial velocity. The and jet-like location along BH rotational axis is given. Some thickness tori energetics are studied.The maximum amount swallowed determined background properties. fast spin...

D. Kramar, J. Kopač, Faculty of Mechanical Engineering, University of Ljubljana, Ljubljana, Slovenia M. Sekulić, Faculty of Technical Sciences, University of Novi Sad, Novi Sad, Serbia Z. Jurković, Faculty of Engineering, University of Rijeka, Rijeka, Croatia Due to their mechanical, thermal and chemical properties, nickel-based alloys are generally included among materials that are hard to mac...

In this paper I review the results of our ongoing project to investigate the coupling between accretion disk and radio jet in galactic nuclei and stellar mass black holes. We nd a good correlation between the UV bump luminosity and the radio luminosities of AGN, which improves upon the usual OIII]/radio correlations. Taking mass and energy conservation in the jet/disk system into account we can...