After reviewing past performances to reduce population growth in Bangladesch, the authors take a critical look at the demographic goals and family planning targets in the fourth Five-Year Plan (1990-'95) of the country. They conclude that the demographic targets set forth in this plan may be...

This paper presents an approach for the determination of aerodynamic performance characteristics of horizontal-axis wind turbines. The optimum twist of a windmill blade is examined on the basis of elementary blade-element theory. For a given wind speed and blade angular velocity, it is shown...