olive is a perennial evergreen tree which has good adaptability to poor environmental conditions such as salt and drought resistance. in recent years, there is a tendency to plant olive trees in green spaces. therefore, this study was carried out to evaluate 15 olive cultivars regarding growth habit, form, and texture to recommend for landscape. six-year-old trees of 15 olive cultivars, which h...

Much of the recent research on infant cognition is framed around a critique of Piaget's theory regarding The Origins of Intelligence (1936/1952) and The Construction of Reality in the Child (1937/1954). The article of Müller and Overton provides a humbling reexamination of this critique, bringing back to us how much has been thought and is accounted for in the monumental work Piaget left behind...

The pseudospectral abscissa and the stability radius are well-established tools for quantifying the stability of a matrix under unstructured perturbations. Based on first-order eigenvalue expansions, Guglielmi and Overton [SIAM J. Matrix Anal. Appl., 32 (2011), pp. 1166-1192] recently proposed a linearly converging iterative method for computing the pseudospectral abscissa. In this paper, we pr...

for maintaining of zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. to detection of suitable sampling method to study tree density in the northern zagros forest, blake forest, in baneeh region, kurdistan province, and west of iran was selected. 40 s...

the importance of shea tree to the people of south-western nigeria cannot be over emphasized considering both the economic and environmental uses of the tree. however, efforts have not been made to propagate its production by the farmers as the shea tree still grows in the wild state. it would be worthwhile to investigate farmers’ perception of shea nut tree as an economic tree and their attitu...