Linux and the developing world

The impact of Linux on the developing world is, in many ways, even greater than on industrialized nations. The authors have used Linux productively in Pakistan in both academia and industry; here they detail what they learned in setting up an 84-seat Linux lab for undergraduate teaching, and how an ISP provider in Pakistan is using Linux to improve its services     

Neutronic and thermal hydraulic analysis for production of fission molybdenum-99 at Pakistan Research Reactor-1

Neutronic and thermal hydraulic analysis for the fission molybdenum-99 production at PARR-1 has been performed. Low enriched uranium foil (<20% ²³⁵U) will be used as target material. Annular target designed by ANL (USA) will be irradiated in PARR-1 for the production of 100 Ci of molybdenum-99 at the end of irradiation, which will be sufficient to prepare required ⁹⁹Mo/^99mTc generators at PINSTECH and its supply in the country. Neutronic and thermal hydraulic analysis were performed using various codes. Data shows that annular targets can be safely irradiated in PARR-1 for production of required amount of fission molybdenum-99.     

Ray analysis of a class of nondevelopable satellite launch vehicles

An efficient algorithm based on Hertz's principle is presented for ray analysis of nondevelopable hybrid quadric surfaces of revolution. This quasi-analytical method for determining ray geometric parameters as required in high-frequency mutual coupling calculations has wide applications for conformal antennas, including those on aerospace vehicles