OBJECTIVE Posterior longitudinal ligament reduction (PLLR) has been widely used for treatment of thoracolumbar burst fractures. However, there are no systemic studies assessing the influence of position parameters of intra-canal fracture fragment (IFF) itself on outcome of reduction. The aim of this study was to analyze the relationship between position parameters of IFF and the reduction effic...

BACKGROUND Stepping is a common technique for balance recovery. Previous studies have shown that elderly adults are less able than young adults to recover balance by stepping, apparently due to reductions in step length and step speed. We sought to clarify these relations by testing the hypothesis that step length and step speed affect the ability of young and elderly women to recover balance. ...

Radar measurements at Aberystwyth (52.4°N, 4.1°W) of winds at tropospheric and lower stratospheric heights are shown for 12±13 March 1994 in a region of highly curved ̄ow, downstream of the jet maximum. The perturbations of horizontal velocity have comparable amplitudes in the troposphere and lower stratosphere with downward and upward phase propagation, respectively, in these two height region...

We study the relaxation of crystal surfaces in 2+1 dimensions via the motion of interacting atomic steps. The goal is the rigorous derivation of the continuum limit. The starting point is a discrete scheme from the Burton, Cabrera and Frank (“BCF”) model, which accounts for diffusion of point defects (“adatoms”) on terraces and attachment-detachment of atoms at step edges. It is shown that the ...

We calculate the two-step contribution to (p, p′) and (p, n) reactions at intermediate energy. We describe the motion of the incident nucleon with a plane wave and compare the contribution from two-step processes with that from one-step processes. To describe the two-step processes, we extend the response functions to nondiagonal forms with respect to the momentum transfer q. We performed a num...

BACKGROUND AND PURPOSE Few and conflicting data exist on the case fatality rate in stroke patients with basilar artery dolichoectasia. We analyzed basilar artery characteristics (diameter, height of bifurcation, transverse position) and 5-year mortality (all-cause, nonstroke vascular, and stroke) in patients with brain infarction. METHODS The basilar artery diameter was measured with a 16-dio...