In 1995, Wu proposed a remote login authentication scheme based on geometric approach. However, Chien, Jan and Tseng presented a cryptanalysis of Wu’s scheme to show that it is not secure. Moreover, they proposed a modified version of Wu’s scheme. This paper presents there is a serious weakness in this modified remote login authentication scheme. We show that an illegal user can easily forge a ...

Since its description in 1989 by Fields and Song (3), the yeast two-hybrid system has proven invaluable for the characterization of protein-protein interactions and the isolation of new proteins that interact with given proteins (for an introduction to many of the aspects of the yeast two-hybrid system, see Reference 1). Although the original method has been modified and new yeast strains have ...

We consider the following, intuitively described process: at time zero, all sites of a binary tree are at rest. Each site becomes activated at a random uniform [0, 1] time, independent of the other sites. As soon as a site is in an infinite cluster of activated sites, this cluster of activated sites freezes. The main question is whether a process like this exists. Aldous [Ald00] proved that thi...

the concept of comprehensive grobner bases was introduced by weispfenning. montes has proposed an efficient algorithm for computing these bases. but he has not explicitly used buchberger's criteria in his algorithm. in this paper we prove that we can apply these criteria on montes algorithm. we propose a modified version of montes algorithm and evaluate its performance via some examples.

This research proposes a new strategy where documents are encoded into string vectors and modified version of KNN to be adaptable to string vectors for text categorization. Traditionally, when KNN are used for pattern classification, raw data should be encoded into numerical vectors. This encoding may be difficult, depending on a given application area of pattern classification. For example, in...

Risk assessment methodology for genetically modified organisms (GMOs) has evolved over the last several years. At a conceptual level, the methodology has been adapted from the existing paradigm for environmental risk assessment, which was developed for chemicals and other types of environmental stressors since at least the 1980s (see Hill and Sendashonga (2003) for discussion). Many of the peop...

Helicases catalyze unwinding of double stranded nucleic acids in an energy-dependent manner. We have reported characterization of UvrD helicase from Plasmodium falciparum. We reported that the N-terminal and C-terminal fragments of PfUvrD contain characteristic ATPase and DNA helicase activities. Here we report the generation and characterization of a genetically engineered version of PfUvrD an...

OBJECTIVE This study aimed to examin the psychometric characteristics of the Persian version of Reproductive Health Assessment Questionnaire for Women of Reproductive Age (RHAQWRA). MATERIALS AND METHODS This study was a cross sectional study. We selected 150 women aged 18- 45 years based on convenience sampling method who lived in the Quake-hit areas in eastern part of Iran in 2013. Some pre...