We present a new algorithm to mesh an arbitrary piecewise linear complex in three dimensions. The algorithm achieves an O(n log∆ + m) runtime where n, m, and ∆ are the input size, the output size, and spread respectively. This represents the first non-trivial runtime guarantee for this class of input. The new algorithm extends prior work on runtime-efficient meshing by allowing the input to hav...

This paper uses Regression Discontinuity Design to study the wage effects of a reform that introduced unjust dismissal costs for firms below 15 employees, while leaving firing costs unchanged for bigger firms. We address the endogeneity of the treatment status due to workers and firms sorting around the 15 employees threshold by applying IV techniques on a sample of exogenously displaced worker...

we evaluated the specific pattern of pre- and postoperative neurological signs and symptoms of cervical spondylotic myelopathy (csm) to determine [mdings which had a predictive value for surgical outcome. consecutive patients with csm caused by osteophytic ridge or intervertebral disc herniation who underwent anterior cervical decompression and fusion in loghman hakim hospital from 1999-2003 we...

bilateral vocal cord paralysis is a rare and preventable complication of anterior cervical discectomy and fusion. herein, we report a fatal case of bilateral vocal cord paralysis after anterior cervical discectomy and fusion (acd/f). a 65-year-old man with cervical spine trauma and anterior cord syndrome, following car overturn presented to our emergency department. the patient had c6-t10 prola...

Abstract Employment of protective structures is vital for reducing the effect local scour created surrounding bridge piers. One most effective used controlling and piers collars. Hence, research on mechanism scouring combination pier collar as well reduction great significance. In this study, various width-to-pier width ratios parameters rectangular has been investigated experimentally in 180-d...

The toxic sheep collar is the most selective method known for killing coyotes that prey on domestic sheep. The concept dates back to the early 1900's, and has been studied at the Denver Wildlife Research Center (DWRC) since 1974. Field tests with sodium cyanide (NaCN) in 1975 were unsuccessful due to repellent properties of the toxicant and to the apparent reluctance of coyotes to attack tether...

INTRODUCTION Research on skill acquisition and retention in the prehospital setting has focused primarily on resuscitation and defibrillation. Investigation into other first aid skills is required in order to validate practices and support training regimes. No studies have investigated competency using an extrication cervical collar for cervical spine immobilization. OBJECTIVE This study was ...