The purpose of this study was to evaluate the profitability of hatchery litter recycling into poultry feedstuff supplement. The data were collected in 2011 in 4 provinces, by direct interviewing of all hatcheries which used the hatchery litter drying machine. Net Present Value (NPV), Benefit-Cost Ratio (BCR), and Internal Rate of Return (IRR) methods were applied for this analysis. In the studi...

As the underlying technologies evolve, embedded systems are finding their way into an increasing range of ABB products and applications. Advances in this technology lead to higher performance and more functionality on the one hand, and reduced cost and size on the other. While this benefits the end user, the ever increasing complexity of embedded systems imposes new challenges for developers. T...

abstract in this study, seven main field crops of the rudasht and abshar irrigation networks of esfahan (with 54,000 ha designed command area) such as wheat, barley, onion, sunflower, fodder mays and sugar beet were selected and swap model was calibrated by inverse modeling base on field experiments results in order to determine crop water salinity production functions. field experiments were c...

The system performance of the supercritical CO2 Brayton cycle for Sodium Fast Reactor with a partial-cooling layout was studied, and an economic analysis carried out. energetic, exergetic, exergoeconomic analyses are presented, optimized results were compared recompression cycle. sensitivity conducted by considering variations in pressure ratios inlet temperatures main compressor turbine. exerg...

The performance of multicarrier systems can be enhanced by the water filling strategy, in which different rates and powers are allocated to subcarriers. However, the induced large signalling overhead leads to less transmission efficiency. To suppress this effect this article proposes an alternative strategy by dynamically assigning the same rate to each subcarrier per user. First, we quantify t...

abstract the main purpose of this paper is to obtain the optimal amount of expenses of government relating to the protection of property rights (pprs). to achieve these purposes we have introduced concept of social intelligence with respect to pprs and then developed different growth model from existing literature. in the second step the optimal share of government spending on the pprs is calcu...