in this research, 272977 test day records collected from 659 herds during years 2001 to 2011 by the iranian animal breeding center were used. in the first section the ability of different models to predict daily milk yield from alternative milk recording was tested. the result showed that a complex model including noon milking time plus the effect of lactation curve of ali and schaeffer functio...

Performance parameters of solar cookers have conventionally been determined by assuming a linear trend between the cooker power and difference load temperature ambient air temperature. This approach may not be convenient for some designs. In present work, suitability non-linear regression derived from fitting measured to second order exponential polynomial was investigated compared with regress...

varieties of st. john’s wort (hypericum perforatum l.) native to iran possess the largest percentage of hypercin in their leaves and flowers. isotherm curves show the relationship between the relative humidity and moisture content of the plant at a constant temperature. it is essential to understand the isotherms curves for successful storage and drying of the plant. this study used adsorption ...

We propose the use of the fractal dimension of a scientist’s citation curve as a performance indicator that can capture its geometric shape, and lead to a measure representative of the whole curve.