the facial esthetics after orthodontic treatment and orthognathic surgery may be affected by the patient's natural head position. the purpose of this study was to evaluate the natural head position for the three skeletal classes of malocclusion.our sample consisted of 102 lateral cephalometric radiographs of patients aged 15 to 18 years; class i (n=32), class ii (n=40) and class iii (n=30). nin...

We extend the class of Banach sequence spaces constructed by Ledari, as presented in ''A class of hereditarily $ell_1$ Banach spaces without Schur property'' and obtain a new class of hereditarily $ell_p(c_0)$ Banach spaces for $1leq p<infty$. Some other properties of this spaces are studied.

This paper deals with a theoretical mathematical analysis of one-dimensional solidification problem, in which kinetic undercooling is incorporated into the This temperature condition at the interface. A model problem with nonlinear kinetic law is considered. We prove a local result intimate for the uniqueness of solution of the corresponding free boundary problem.

Addressed is the uplink access control problems for cellular CDMA systems that service heterogeneous traac with various types of quality-of-service (QoS) and use Multi-Code CDMA (MC-CDMA) to support variable bit rates. Considering its distinct QoS requirements, class-I real-time traac (e.g., voice and video) is diierentiated from class-II non-real-time traac (e.g., data). Connection-oriented tr...

in this paper, we study a class of finsler metrics which contains the class of p-reducible andgeneral relatively isotropic landsberg metrics, as special cases. we prove that on a compact finsler manifold,this class of metrics is nothing other than randers metrics. finally, we study this class of finsler metrics withscalar flag curvature and find a condition under which these metrics reduce to r...

results of different studies demonstrate that the world-class organizations have better performance in encountering challenges of twenty-first century. therefore developing such features is strongly recommended to iranian firms. most of experts believe that to achieve to world-class situation, the most important factor is marketing, and all organizations should assess themselves about world-cla...