ARIES: Cylindrical Pendulum Actuated Explorer Sphere

Transient and asymptotic dispersion in confined sphere packings with cylindrical and non-cylindrical conduit geometries.

We study the time and length scales of hydrodynamic dispersion in confined monodisperse sphere packings as a function of the conduit geometry. By a modified Jodrey-Tory algorithm, we generated packings at a bed porosity (interstitial void fraction) of ε=0.40 in conduits with circular, rectangular, or semicircular cross section of area 100πd(p)(2) (where d(p) is the sphere diameter) and dimensio...

Phyllotactic description of hard sphere packing in cylindrical channels.

We develop a simple analytical theory that relates dense sphere packings in a cylinder to corresponding disk packings on its surface. It applies for ratios R=D/d (where d and D are the diameters of the hard spheres and the bounding cylinder, respectively) up to R=1+1/sin(π/5). Within this range the densest packings are such that all spheres are in contact with the cylindrical boundary. The deta...

ARIES Assessment

D-ARIES: A Distributed Version of the ARIES Recovery Algorithm

This paper presents an adaptation of the ARIES recovery algorithm that solves the problem of recovery in Shared Disk (SD) database systems, whilst preserving all the desirable properties of the original algorithm. Previous such adaptations of the ARIES algorithm have failed to solve some of the problems associated with SD systems, resulting in a number of undesirable compromises being made. The...

Repeating History Beyond ARIES

In this paper, I describe first the background behind the development of the original ARIES recovery method, and its significant impact on the commercial world and the research community. Next, I provide a brief introduction to the various concurrency control and recovery methods in the ARIES family of algorithms. Subsequently, I discuss some of the recent developments affecting the transaction...