This paper presents an adaptive policy management scheme for the security threats in distributed systems. First, we investigate the security aspects of computer networks architecture and observe that security services are provided at application, transport and network layers. Network layer security presents some important opportunities for offering controls over security threats to distributed ...

Intelligent foraging, gathering and matching (I-FGM) has been shown to be an effective tool for intelligence analysts who have to deal with large and dynamic search spaces. I-FGM introduced a unique resource allocation strategy based on a partial information processing paradigm which, along with a modular system architecture, makes it a truly novel and comprehensive solution to information retr...

We consider a team of agents that are required to coordinate their actions in order to maximize a global objective. Our domains are characterized by uncertainty, dynamism, and distributed information. Determining appropriate actions becomes quite difficult, especially as the number of agents and the coupling between them increases. This paper discusses four contributions toward the goal of coor...

The development of Internet wide resources for general purpose parallel computing poses the challenging task of matching computation and communication complexity. A number of parallel computing models exist that address this for traditional parallel architectures, and there are a number of emerging models that attempt to do this for large scale Internet-based systems like computational grids. I...

This paper describes the Obje Perception Framework (OPF ), a distributed software architecture for context sensing and inference in ubiquitous computing environments. OPF provides flexibility, scalability, and robustness even as the sensor configuration changes. For flexibility, OPF supports many context inference tasks, ways of achieving those tasks, and heterogeneity in sensor types. With res...

To investigate the genomic architecture underlying the quintessential adaptive phenotype, antifreeze glycoprotein (AFGP) that enables Antarctic notothenioid survival in the frigid Southern Ocean, we isolated the AFGP genomic locus from a bacterial artificial chromosome library for Dissostichus mawsoni. Through extensive shotgun sequencing of pertinent clones and sequence assembly verifications,...

Growing complexity and cost of system deployment, ownership and operation pushes to look for economical, yet limitless ways to organize and manage large-scale computing in science, technology and businesses. The two most prominent examples are the concepts of the Utility Data Center [1] and the Grid [2]. One of the hard problems in system management is the distributed resource allocation proble...

Mobility and the New Global Economy are accompanied by requirements for dynamism and flexibility, with respect to e-commerce, interorganizational activity, and security. The classical approach to computer security, typified by firewalls, is no longer suitable to encourage and facilitate the growth and nomadic collaboration foreseen for current and future corporate environs. This paper investiga...

This paper presents a semi-automated method for evaluating SOAs called SOAQE, correcting defects observed so far with existing methods such as lacks of pertinence and accuracy for evaluation results. SOAQE takes as a starting point the McCall model, describing software quality, which led to an international standard for the evaluation of software quality (ISO/IEC 9126-1, 2001). This model is or...