We computed the static potential and Wilson loops to O(α 2) in perturbation theory for different lattice quark and gluon actions. In general, we find short distance lattice data to be well described by " boosted perturbation theory ". For Wilson-type fermions at present-day quark masses and lattice spacings agreement within 10 % between measured " β-shifts " and those predicted by perturbation ...

We calculate the geometric and homotopical (or stable) bordism rings associated to semi-free S 1 actions on complex manifolds, giving explicit generators for the geometric theory. To calculate the geometric theory, we prove a case of the geometric realization conjecture, which in general would determine the geometric theory in terms of the homotopical. The determination of semi-free actions wit...

.................................................................................................................................................. ix Introduction...............................................................................................................................................1 I. The determinants of foreign currency sovereign ratings: theory, data and OLS estimates ...

We consider external reflection rainbow caustics due to the reflection of light from a pendant droplet where the light rays are at an arbitrary angle with respect to the horizontal. We compare this theory to observation of glare spots from pendant drops on grass; we also consider the potential application of this theory to the determination of liquid surface tension.

Recent analytical and computational advances in the theory of large-scale dynamos are reviewed. The importance of the magnetic helicity constraint is apparent even without invoking mean-field theory. The tau approximation yields expressions that show how the magnetic helicity gets incorporated into mean-field theory. The test-field method allows an accurate numerical determination of turbulent ...

A theory is presented for the computation of three dimensional motion and structure from dynamic imagery, using only line correspondences. The traditional approach of corresponding microfeatures (interesting points-highlights, corners, high curvature points, etc.) is reviewed and its shortcomings are discussed. Then, a theory is presented that describes a closed form solution to the motion and ...

In this paper we describe a new quantification theory based on the Object Determination Logic(ODL). This theory extends the system of classical quantifiers as a system including the classical and linguistic ones. It takes into account typicality, as a dimension of cognition. This theory represents the background of a computational model in the semantic analysis of natural languages. This paper ...

Polygonal 3D-reconstructions of cerebral aneurysms, combined with simulated or measured flow data provide important information for medical research, risk assessment and therapy planning. Landmarks, orientation axis, and a subdivision into functional unities, support the purposeful exploration of this complex data. The ostium, the area of inflow into the aneurysm, is the reference structure for...

This paper deals with the problem of astrometric determination of the orbital elements of the outer planets, in particular by assessing the ability of astrometric observations to detect perturbations of the sort expected from the Pioneer effect or other small perturbations to gravity. We also show that while using simplified models of the dynamics can lead to some insights, one must be careful ...

The purpose of this paper is to investigate the correlation between meteorological factors and Newcastle disease incidence, and to determine the key factors that affect Newcastle disease. Having built BP neural network forecasting model by Matlab 7.0 software, we tested the performance of the model according to the coefficient of determination (R2) and absolute values of the difference between ...