Global convergence results are derived for well-known conjugate gradient methods in which the line search step is replaced by a step whose length is determined by a formula. The results include the following cases: 1. The Fletcher-Reeves method, the Hestenes-Stiefel method, and the Dai-Yuan method applied to a strongly convex LC objective function; 2. The Polak-Ribière method and the Conjugate ...

perfused organs to examine sugar catabolism and metabolism, Holmes underscores the relationship between the laboratory elucidation of a significant intermediate compound like acetone and the clinical knowledge of ketone body production in diabetes. But, he concludes, the early-twentieth-century integrative optimism evaporated, to be re-formulated in the 1930s with the announcement of the "Embde...

The object of this paper is the theta divisor of the compactified Jacobian of a nodal curve of genus g. We determine its irreducible components and give it a geometric interpretation. A characterization of hyperelliptic irreducible curves in M g is appended as an application.

In this paper (part three of the trilogy) we use low degree G 1 and G 2 continuous regular algebraic spline curves deened within parallelograms, to interpolate an ordered set of data points in the plane. We explicitly characterize curve families whose members have the required interpolating properties and possess a minimal number of innection points. The regular algebraic spline curves consider...

acute paraplegia is a rare but catastrophic complication of surgeries performed on aorta and corrective operations of vertebral column. trauma to spinal cord after spinal anesthesia and ischemia of spinal cord also may lead to acute paraplegia. acute paraplegia as a complication of general anesthesia in surgeries performed on sites other than aorta and vertebral column is very rare. here we pre...

acute injuries of the spine and spinal cord are among the most causes of severe disability and death after trauma. data about spine fracture with or without cord damage are different. the aim of this study was to determine epidemiology and demographics of spinal injury in main trauma center, guilan, an iranian province. the present study was a descriptive study of all cases of traumatic spine i...

cortical spreading depression (csd) has been suggested to underlie some neurological disorders such as migraine. despite the intensity with which many investigators have studied sd in the brain, only a few studies have aimed to identify sd in the spinal cord. here we described the main characteristic features of sd in the spinal cord induced by different methods including various spinal cord in...

Objective AIS is a three-dimensional (3-D) spinal deformity, characterized by lateral deviation, axial rotation and apical lordosis of three individual curves. The 3-D morphology of the different areas of the scoliotic spine has not been quantified so far. This is the first study to accurately define the 3-D morphology of AIS and compare it to normal anatomy. This is important for understanding...

Background The Ortelius 800 is a device for measuring scoliosis curves in AIS using surface topography. Initial experience with this machine was found to be unreliable, but more recent techniques have been shown to greatly enhance the reliability and reproducibility of Cobb angle measurements. If this machine can be used to obtain consistent measurements, then in addition to its use by spinal d...

Methods In total, 20 children with right thoracic (n= 14) and double curves (n=6) (right thoracic left lumbar) were assessed. The SRS/SOSORT inclusion criteria for brace treatment were used. The Cobb angle was measured on postero-anterior and the rib index (RI) was calculated from the double rib contour sign (DRCS) according to Grivas et al. 2002 on lateral standing spinal radiographs. The refe...