Edgebreaker is a simple scheme for compressing the triangle/vertex incidence graphs (sometimes called topology) of threedimensional triangle meshes. Edgebreaker improves upon the worst case and the expected compression ratios of previously reported schemes, most of which require O(nlogn) bits to store the incidence graph of a mesh of n triangles. Edgebreaker requires only 2n bits or less for si...

BACKGROUND Nerve root decompression with instrumented spondylodesis is the most frequently performed surgical procedure in the treatment of patients with symptomatic low-grade spondylolytic spondylolisthesis. Nerve root decompression without instrumented fusion, i.e. Gill's procedure, is an alternative and less invasive approach. A comparative cost-effectiveness study has not been performed yet...

grave’s disease is a clinical syndrome consisting of hypermetabolism, diffuse thyroid enlargement and exophthalmos. which has ocular complications. due to the high incidence of these complications and the risk of blindness special attention is needed. many therapeutic methods including medical surgical and radiotherapy for ocular complications are suggested. in cases of medical therapy failure,...

Scuba diving is associated with an important risk of devel­oping decompression sickness secondary to formation of gas bubbles inside the body. The latter is formed mainly by nitrogen in the body on the diver’s way to the surface (1,2). In some cases, it might injure the central nervous system. Several decompression cases that have been asso­ciated with neurologic symptoms are described in the l...

core decompression (cd) of the femoral head is one of the effective treatments of avascular necrosis (avn), especially in the early stages of the disease. to investigate further the value of cd in treating the avn, this study was performed on patients with symptomatic avn with different etiologies who were treated with cd. this study was carried out on 25 patients (with the total number of 37 f...