We study dynamics of Type IIB bound-state of a Dirichlet string and n fundamental strings in the background of N fundamental strings. Because of supergravity potential, the bound-state string is pulled to the background fundamental strings, whose motion is described by open string rolling radion field. The string coupling can be made controllably weak and, in the limit 1 ≪ g stn ≪ g stN , the b...

A bstract We reformulate in Hamiltonian language the recent proposal by Hohm and Zwiebach of an action yielding most general O ( d , )-symmetric string cosmology equations, at tree-level string-loop expansion, but to all orders α′ expansion. This allows us give a simple characterization large class non-singular, non-perturbative, pre-big bang scenarios smoothly interpolating between low-energy ...

An approach with the capability of searching a word portion in document images is proposed in this paper, to facilitate the detection and location of the user-specified query words. A feature string is synthesized according to the character sequence in the user-specified word, and each word image extracted from documents are represented by a feature string. Then, an inexact string matching tech...

We consider the problem of finding quasiperiodicities in a Fibonacci string. A factor u of a string y is a cover of y if every letter of y falls within some occurrence of u in y. A string v is a seed of y, if it is a cover of a superstring of y. A left seed of a string y is a prefix of y that it is a cover of a superstring of y. Similarly a right seed of a string y is a suffix of y that it is a...