Abstract: Recently, He et al. [D. He, J. Chen, J. Hu, A pairing-free certificateless authenticated key agreement protocol, International Journal of Communication Systems, 25(2), pp. 221-230, 2012] proposed a pairing-free certificateless authenticated key agreement protocol and demonstrated that their protocol is provable security in the random oracle model. However, in this paper, we show that ...

Formation of double-strand breaks at recombination signal sequences is an early step in V(D)J recombination. Here we show that purified RAG1 and RAG2 proteins are sufficient to carry out this reaction. The cleavage reaction can be divided into two distinct steps. First, a nick is introduced at the 5' end of the signal sequence. The other strand is then broken, resulting in a hairpin structure a...

the male breast cancer (mbc) is a very rare neoplasm which accounts for 0.5-1% of the total cases of breast cancer. bilateral involvement is reported to occur in fewer than 2% of all the diagnosed cases of mbc, and synchronous tumors are very rare. because of its rarity, little is known about mbc etiology, its clinical findings and treatment. most patients present with a painless breast mass. t...

Let S(1), . . . , S(n), T (1), . . . , T (n) be random subsets of the set [m] = {1, . . . ,m}. We consider the random digraph D on the vertex set [n] defined as follows: the arc i → j is present in D whenever S(i)∩T (j) 6= ∅. Assuming that the pairs of sets (S(i), T (i)), 1 ≤ i ≤ n, are independent and identically distributed, we study the inand outdegree distributions of a typical vertex of D ...

1 A tolerance rough set model Denote the set of M full text documents by D, and the set of N terms from D by T. The method generates a hierarchical structure of D in two phases. The rst phase extracts and maps each document dj 2 D into a list of terms ti each of which is assigned a weight that re BLOCKINects its importance in the document, then enriches documents with their approximations by th...

An efficient automatic quadrature procedure is developed for numerically computing the integrals 0 , where the function is smooth and nonoscillatory at infinity and is the Bessel functions of order ν =1,0 and 1/4. The procedure involves the use of an automatic integration scheme of modified FFT used for evaluating Fourier integrals and product type integration, and the modified W-transformation...