We propose a service discovery architecture called VSD (Service Discovery based on Volunteers) for heterogeneous and dynamic pervasive computing environments. The proposed architecture uses a small subset of the nodes called volunteers that perform directory services to facilitate efficient service discovery. In VSD, stable and capable nodes serve as volunteers whereas relatively dynamic and le...

This paper has examined the phenomenon of convergence of per capita out put levels across the IC countries for the 1960-1998 periods. Three concepts of convergence, i.e., sigma beta and relative beta, have been used. The estimated beta values reveals only a very weak convergence (?=.0014) across IC for 1960-1998 period. But when a more homogeneous group of countries were selected, the results s...

Dynamism was originally defined as the proportion of online versus offline orders in the literature on dynamic logistics. Such a definition however, loses meaning when considering purely dynamic problems where all customer requests arrive dynamically. Existing measures of dynamism are limited to either (1) measuring the proportion of online versus offline orders or (2) measuring urgency, a conc...

Given the widespread contribution of independent contractors to organizational innovation and competitive advantage, it is timely reassess assumptions about HRM practices appropriate their management rationale for organizations work with them. In original highly influential HR architecture model Lepak Snell (1999), contractor status viewed as an outcome low value and/or uniqueness human capital...

A critical issue for complex component-based systems design is the modeling and analysis of architecture. One of the complicating factors in developing architectural models is accounting for systems whose architecture changes dynamically (during run time). This is because dynamic changes to architectural structure may interact in subtle ways with on-going computations of the system. In this pap...

Ubiquitous Computing (UbiComp) environments are characterized by high distribution, heterogeneity and dynamism. In these environments, applications must be aware of their contexts and adapt to changes in them. Considering these characteristics of ubiquitous environments, this paper presents an architecture for context awareness, called DynamiCA (Dynamic Context Awareness), which includes elemen...

This paper addresses the dynamic aspect of Publish/Subscribe architectures. We propose an integrated formal approach for the specification and verification of reconfigurations over the topology of Publish/Subscribe architecture styles. We integrate a functional approach and a structural approach based on graph grammars. The purpose is to express dynamism while offering a simple specification wh...

Existing software architecture research has focused on static architectures, where the system architecture is not expected to change during system execution. We argue that the architectures of many systems, especially long running or mission critical systems, evolve during execution, and thus cannot be accurately modeled and analyzed using static architectures. To overcome these problems, we pr...

Research domains such as sensor networks, ad-hoc networks, and pervasive computing, clearly illustrate that computer networks have become more complex and dynamic. This complexity is mainly introduced by unpredictable and varying network link characteristics, heterogeneous capabilities of attached nodes, and the increasing user expectations regarding reliability and quality of service. In order...