We explore singularly perturbed convection-diffusion equations in a circular domain. Considering boundary layer analysis of the singularly perturbed equations and we show convergence results. In view of numerical analysis, We discuss approximation schemes, error estimates and numerical computations. To resolve the oscillations of classical numerical solutions due to the stiffness of our problem...

Finding iterative roots is the inverse problem of iteration. Iteration itself plays a major role in numerous theories and applications. So far it is hardly realized how many problems can be related to its counterpart. This may be due to the difficulty of the mathematics involved: There are no standard methods available for computing these fractional iterations. Previously we have shown how neur...

AIM to determine the profile of vitamin D and parathyroid hormone (PTH) and the proportion of vitamin D inadequacy in a population of postmenopausal osteoporotic patients from a rheumatologic outpatient clinic. METHODS a cross sectional study was conducted between October and December 2006 in the Rheumatology Clinic, Cipto Mangunkusumo Hospital with osteoporosis confirmed by bone mineral dens...

OBJECTIVE Previous research on the combined association of 25-hydroxyvitamin D (25(OH)D) and parathyroid hormone (PTH) with metabolic syndrome may have been limited by restricted age variability and a lack of representation of the general population. This study examined the combined association of 25(OH)D and PTH with Adult Treatment Panel III-defined MetSyn among a nationally representative sa...

Novel carbon fiber enzyme electrodes were constructed and evaluated. Fabrication of was performed via electrochemical deposition a conducting matrice composed polythiophene polypyrrole (PTh–PPy) onto substrates. The entrapped into the matrix during electropolymerization. Resultant biosensors represented higher kinetic parameters, Vmax Km, in comparison to PPy matrice, which are 2.471 ± 0.150 m...

We present on the method of inverse coherence matrix for the estimation of network connectivity from multivariate time series of a complex system. In a model system of coupled chaotic oscillators, it is shown that the inverse coherence matrix defined as the inverse of cross coherence matrix is proportional to the network connectivity. Therefore the inverse coherence matrix could be used for the...