The application of Internet technologies to online transactions has lead to the amazing growth of Internetbased electronic markets (e-markets). This paper describes an Internet-based directory service for e-markets that aims to facilitate online buyers by making the process of finding an e-market easier and less time-consuming. This service, termed e-Market Metadata (eMaM) directory service, is...

82 IEEE Concurrency T he e-commerce revolution has arrived. E-commerce business-to-business (B2B) revenue is projected to rise from $43 billion in 1998 to $1 trillion in 2003, a 23-fold increase. Consumer purchases online are expected to be worth $380 billion in 2003, up from an estimated $31.2 billion in 1999.1 According to a recent study by the University of Texas Center for Research in Elect...

This paper discusses the aspect of designing network infrastructure for e-learning private clouds. The aim is to build a comprehensive, stable, scalable, reliable and flexible infrastructure that will effectively support all models of deploying cloud computing services in academic environment. Main component of the infrastructure is a network organized in three logical layers: core, distributio...

Uncontrolled overload can lead e-commerce applications to considerable revenue losses. For this reason, overload prevention in these applications is a critical issue. In this paper we present a complete characterization of secure e-commerce applications scalability to determine which are the bottlenecks in their performance that must be considered for an overload control strategy. With this inf...

aroa is an important gene which produces aromatic amino acids essential for bacterial life. the sequence of this gene was shown to be different in bacteria, so the purpose of this study was sequencing of aroa gene in native e. coli o78: k80 to determine the putative differences between this strain and other e. coli o78: k80 strains in gene bank. pcr was used to amplify aroa gene in native e. co...

Component based approaches are becoming more and more popular to support distributed application development. The concept of component itself, however, is not generally agreed upon and several definitions can be found. Moreover, different approaches to object oriented component modeling obtain different abstraction levels (conceptual vs. operational). In this paper, we discuss the concept of co...