objective: to examine the relationship between socioeconomic factors affecting contraceptive use among tribal women of bangladesh with focusing on son preference over daughter. materials and methods: the study used data gathered through a cross sectional survey on four tribal communities resided in the rangamati hill district of the chittagong hill tracts, bangladesh. a multistage random sampli...

making capital and investment is the main driving forces of economic development. based on the investment sensitivity to the changes of some of macro-economic variables and risk and uncertainty, the present study evaluated the effective factors on investment in private sector in iran during 1980-2007. at first, the uncertainty variables of real informal exchange rate, nominal interest rate and ...

[1] Abyssal-hill shape and orientation are related to the direction and spreading rate of paleo-spreading centers. Therefore analyzing abyssal-hill shape and trend is useful for constraining tectonic models of regions devoid of magnetic reversal anomalies. Detecting systematic changes of abyssal-hill shapes or trends, due to changes in spreading rate or direction, is not straightforward, which ...

The coordination of the motions of the robots is one of the fundamental problems for multi-robot systems. A popular approach to avoid planning in the high-dimensional composite configuration space are prioritized and decoupled techniques. While these methods are very efficient, they have two major drawbacks. First, they are incomplete, i.e. they sometimes fail to find a solution even if one exi...

We investigate the long-time behavior of weak solutions to the thin-film type equation vt = (xv − vvxxx)x , which arises in the Hele-Shaw problem. We estimate the rate of convergence of solutions to the Smyth-Hill equilibrium solution, which has the form 1 24 (C − x2)2+, in the norm |||f |||2m,1 = ∫ R (1 + |x|)|f(x)|dx+ ∫ R |fx(x)|dx . We obtain exponential convergence in the ||| · |||m,1 norm ...

introduction: spatial variation of soil properties is significantly influenced by numerous environmental factors such as landscape features, including position, topography, slope gradient and aspect, parent material, climate and vegetation. soil properties vary spatially in south- and north-facing hill slopes. this factor (different slope aspects) can affect the distribution of soil organic mat...