We study the stochastic coagulation equation using simplified models and efficient Monte Carlo simulations. It is known that (i) runaway growth occurs if the two-body coalescence kernel rises faster than linearly in the mass of the heavier particle; and (ii) for such kernels, runaway is instantaneous in the limit that the number of particles tends to infinity at fixed collision time per particl...

Recent theoretical work has solidified the viability of the collisional runaway scenario in young dense star clusters for the formation of very massive stars (VMSs), which may be precursors to intermediatemass black holes (IMBHs). We present first results from a numerical study of the collisional runaway process in dense star clusters containing primordial binaries. Stellar collisions during bi...

We have used the Hubble Space Telescope to measure the motion in the sky and compute the galactocentric orbit of the black hole X-ray binary GRO J1655-40. The system moves with a runaway space velocity of 112± 18 km s in a highly eccentric (e = 0.34± 0.05) orbit. The black hole was formed in the disk at a distance greater than 3 kpc from the Galactic centre and must have been shot to such eccen...

Recent research on the social support networks of homeless and runaway youth suggest the social networks of runaway youth are made up largely of transient deviant peer relationships. This paper examined social network characteristics of 428 homeless and runaway adolescents from small-to moderate-sized cities in four Midwestern states. We investigated size, homogeneity, and correlates of the com...

In a tokamak disruption, a substantial fraction of the plasma current can be converted into runaway electrons. Although these are usually highly relativistic, their total energy is initially much smaller than that of the pre-disruption plasma. However, following a suggestion by Putvinski et al. [Plasma Phys. Control. Fusion 39, B157 (1997)], it is shown that as the post-disruption plasma drifts...

Models for the growth of runaway systems such as cancerous systems can be incorporated into animat agent systems. Large systems can be used to simulate macroscopic emergent spatial patterns of growth and behaviour. We report on experiments involving animats with a runaway success factor introduced into a spatial agent system that would otherwise maintain a dynamical equilibrium around stable me...

The recent catalog of spectral types of Galactic O-type stars by MáızApellániz et al. has been used to study the differences between the frequencies of various subtypes of O-type stars in the field, in OB associations and among runaway stars. At a high level of statistical significance the data show that Ostars in clusters and associations have earlier types (and hence presumably larger masses ...

Consolidation has been implemented in two ways: as straight rehearsal of patterns or as pseudorehearsal, in which pseudoitems are created by sampling attractors or input–output combinations from the network. Although both implementations have been investigated by several authors, few have explored how it is decided which pattern or pseudoitem is consolidated. Controlling consolidation is not tr...

Introduction Baumgardner (1986, 1990, 1994a, 1994b) has advanced the proposition that the essential process responsible for the large-scale tectonic changes contemporaneous with the Genesis Flood was runaway subduction of the pre-Flood oceanic lithosphere. Precursory to the runaway would be some pattern of stress concentration and shear zone formation in the pre-Flood lithosphere, concentrated ...

Amyloid fibrils are associated with >20 fatal human disorders, including Alzheimer's, Parkinson's, and prion diseases. Knowledge of how soluble proteins assemble into amyloid fibrils remains elusive despite its potential usefulness for developing diagnostics and therapeutics. In at least some fibrils, runaway domain swapping has been proposed as a possible mechanism for fibril formation. In run...