A hybrid collocation method for solving highly nonlinear boundary value problems.

In this article, a hybrid collocation method for solving highly nonlinear boundary value problems is presented. This hybrid method combines Chebyshev collocation method with Laplace and differential transform methods to obtain approximate solutions of some highly nonlinear two-point boundary value problems of ordinary differential equations. The efficiency of the method is demonstrated by applying it to ordinary differential equations modelling Darcy-Brinkman-Forchheimer momentum problem, laminar viscous flow problem in a semi-porous channel subject to transverse magnetic field, fin problem with a temperature-dependent thermal conductivity, transformed equations modelling two-dimensional viscous flow problem in a rectangular domain bounded by two moving porous walls and two-dimensional constant speed squeezing flow of a viscous fluid between two approaching parallel plates.

Pattern of mandibular fractures in an urban major trauma center.

Purpose: Many studies focusing on the pattern of presentation of mandibular fractures are inconclusive. This is largely due to a multifactorial involvement of associated factors and the role of anatomic factors.

Patients And Methods: We reviewed a 10-year retrospective analysis of the pattern of presentation of mandibular fractures at an urban level I trauma center in Washington, DC, and the significance of the variables in association with the fractures.

Microbiological composition of whole saliva and caries experience in minority populations.

Microbiological factors in whole saliva, previously implicated in dental caries formation, were studied in four caries-positive adult ethnic groups: Asians, blacks, whites, and Hispanics. Whole saliva was collected from each patient and used for the enumeration of total cultivable microflora (T), streptococci, mutans streptococci (MS), and lactobacilli. In the female subgroup, statistically significant differences were found among the ethnic groups with regard to T in saliva.