Africa continues to lack the data for direct estimates of infant and child mortality. Estimation of infant and child mortality in Africa has been based on Brass-type indirect methods. This paper seeks to utilise an extension of the Brass method proposed by Preston and Palloni—known as the “own-child” method— to estimate infant and child mortality using the 1990 Zambia national census data. The ...

This paper presents how the shape of a brass instrument can be optimized with respect to its intonation properties. The instrument is modeled using a hybrid method between a lossy one-dimensional transmission line analogy for the slowly flaring part of the instrument, and a two-dimensional finite element model for the rapidly flaring part. The optimization employs gradient-based algorithms, and...

Growth of semiconductor nanowires on cheap metal substrates could pave the way to the large-scale manufacture of low-cost nanowire-based devices. In this work, we demonstrated that high density InN nanowires can be directly grown on brass substrates by metal-organic chemical vapor deposition. It was found that Zn from the brass substrates is the key factor in the formation of nanowires by restr...

One of the solutions for density measurement is to make use gamma-ray transmission technique. We studied by this technique, using Co-60 and Cs-137. Each source, without materials in geometry, was counted noted intensities as (I0). All were (I). [I/I0] rates calculated. Now, could be determined via Beer-Lambert Equation. Experimental application performed on industrial metals or metal alloys lik...