In this work, two parametric L-Systems have been introduced to generate the figures of two series of nanostructures. These series consist of different spherical fullerenes with various number of carbon atoms. By specifying a parameter in each series a spherical fullerene can be determined. The members of the first series are C60 , C240 , C540 , C940 ,… which can be produced by applying paramete...

Many bipartite networks describe systems where an edge represents a relation between user and item. Measuring the similarity either users or items is basis of memory-based collaborative filtering, widely used method to build recommender system with purpose proposing users. When edges network are unweighted, popular common neighbors-based approaches, allowing only positive values, neglect possib...

Woodland restoration sites planted with Quercus lobata (valley oak) often have serious invasions of nonnative annual grasses and thistles. Although prescribed fire can effectively control these exotics, restoration managers may be reluctant to use fire if it causes substantial mortality of recently planted saplings. We studied the effects of prescribed fires on the survival and subsequent growt...