background: the aim of this study was to estimate the frequency and rate of the first 50 common types of invasive procedures in iran. methods: data about the number of all invasive procedures and each type of procedure that were conducted in iran in 2010 were collected using the main insurance organizations database. these numbers were sorted in an excel database, and the first 50 invasive proc...

intussusception is a common pediatric surgical emergency, but rarely seen postoperatively as a cause of obstruction. this complication occurs after abdominal, thoracic, orthopaedic and urologic operations. ileus and obstruction due to adhesion band are the common causes of postoperative obstruction, however, although intussusception is less frequent but can be serious. we have to consider this ...

Given a family of 3-graphs F , we define its codegree threshold coex(n,F) to be the largest number d = d(n) such that there exists an n-vertex 3-graph in which every pair of vertices is contained in at least d 3-edges but which contains no member of F as a subgraph. Let F3,2 be the 3-graph on {a, b, c, d, e} with 3-edges abc, abd, abe and cde. In this paper, we give two proofs that coex(n, {F3,...

this paper proposes a low voltage (±0.55v supply voltage) low power (44.65µw) high common mode rejection ratio (cmrr) differential amplifier (d.a.) with rail to rail input common mode range (icmr), constant transconductance (gm) and enhanced frequency performance. its high performance is obtained using a simple negative averaging method so that it cancels out the common mode input signals at th...