We developed an information delivery system, namely WIDE (Wireless Information Delivery Environment), in client-server architecture using 802.11b infrastructure. WIDE aims to deliver popular information services to registered mobile clients in WLAN hot spots. We present the proposed system architecture, related delivery mechanism and communication protocols. We also give a brief overview of mec...

e-Business has been popular in the world since Internet and World-Wide-Web came out to the world. Its applications are based on N-tier architecture. There are two famous approaches to build the applications, which are J2EE and .NET. In this paper, e-Business and N-tier architecture are described. Besides, J2EE and .NET are compared based on criteria to build e-Business application.

Automation of management tasks is an effective counter-measure to the growingcomplexity of distributed systems. An increasingly popular view redefines the role of the management system to include automated validation and enforcement of policy. This research proposes an architecture for a policy-driven management system which can adapt dynamically to policy change. We show how this architecture ...

In this paper we present an architecture for building Information Systems that can be adapted to several runtime environments. Our architecture is structured in three layers: client, services and data layers. All the layers are independent, making the system more flexible and scalable. The core of the IS is implemented in Java to make possible platform and database independence. One of the most...

P2P architecture is the next-generation network paradigm to replace the traditional client-server architecture. Typical P2P systems are characterized by the decentralized control, scalability and robustness. Centrally managed storage services, such as Dropbox, are popular for synchronizing data between several devices. P2P-based approaches that run fully decentralized, such as BitTorrentSync, a...

Web services are quickly becoming the most popular tool for distributed computing. Due to this popularity a comprehensive security architecture is needed. In this paper we introduced such a comprehensive architecture that includesin addition to the standard services of integrity and confidentialityauthentication, authorization and a defense against denial of service attacks. This model builds o...

We developed an information delivery system, namely WIDE (Wireless Information Delivery Environment), in client-server architecture using 802.11b infrastructure. WIDE aims to deliver popular information services to registered mobile clients in WLAN hot spots. We present the proposed system architecture, related delivery mechanism and communication protocols. We also give a brief overview of mec...

MPI has emerged as a popular way to write architecture–independent parallel programs. By modifying an MPI library and associated MPI run–time environment, transparent extraction of timestamped information is possible. The wall–clock time at which specific MPI communication events begin and end can be recorded, collected, and provided to a central scheduler. The infrastructure to create and coll...

A Java class is a perfect example of architecture independent code. A Java program can be compiled on a MIPS R4400 based Indy workstation running Irix 6.5 and the generated class executed on an Intel Pentium III based Windows 95 system with no problems. This independence is possible, because any system claiming to support Java implements a Java Virtual Machine (JVM). This paper presents a detai...

T he Common Object Request Broker Architecture is a specification for creating, distributing, and managing distributed program objects across a network. Both the International Organization for Standardization and X/Open have sanctioned CORBA as the standard middleware architecture for distributed objects. CORBA was specifically designed to support heterogeneous environments, different vendors’ ...