The Matrix-Forest Theorem the number of C>'-UUiiJL<hv.UA. obtained A J-cycle in G, for J ~ is a directed For any node i, an i-rooted tree in we mean a tree where one outgoing which has none. In other in the tree, the path between j and i in the tree directed towards tree is sometimes called an "in-directed arborescence".) If the tree reaches all the nodes m it is an i-rooted tree. For any node ...

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...

economic and environmental logging is important for sustainable wood production in the caspian forests, north of iran. predetermination of the skid trail network and directional felling is a usual recommended method to reduce logging impact. the aim of this study was evaluation of directional felling and finding factors effective on felling error. totally 135 trees were selected randomly for di...

It is well-known that, given inorder traversal along with one of the preorder or postorder traversals of a binary tree, the tree can be determined uniquely. Several algorithms have been proposed to reconstruct a binary tree from its inorder and preorder traversals. There is one study to reconstruct a binary tree from its inorder and postorder traversals, and this algorithm takes running time of...

In this paper, two different ways of introducing alternation for lattice-valued (referred to as {L}valued)  regular tree grammars and {L}valued top-down tree automata are compared. One is the way which defines the alternating regular tree grammar, i.e., alternation is governed by the non-terminals of the grammar and the other is the way which combines state with alternation. The first way is ta...

conclusions according to the liver microrna data of chinese tree shrew, characteristics of the mir-122 and let-7 families further highlight the suitability of tree shrew as the animal model in hcv research. objectives this study aimed to construct a liver microrna (mirna) data of the tree shrew. materials and methods three second filial generation tree shrews were used in this study. total rna ...