Large-scale scientific and business applications require data processing of ever-increasing amounts of data, fueling a demand for scalable parallel file systems comprising hundreds to thousands of disks. Modern parallel file system architectures however, span a large and complex design space. As a result, IT architects are faced with a challenge when deciding on the most appropriate parallel fi...

Managing storage in the face of relentless growth in the number and variety of files on storage systems creates demand for rich file system metadata as is made evident by the recent emergence of rich metadata support in many applications as well as file systems. Yet, little support exists for sharing metadata across file systems even though it is not uncommon for users to manage multiple file s...

Mobility is regarded as the most important feature needed to achieve adaptability and flexibility in the executing of service components. As such, service system could be able to cope with the handling of dynamic changes in the availability of resources and position of users. On the other hand, providing user-centric and personal-content driven wide range of services, more commonly wireless one...

Research in computer security has historically advocated Design for Security, the principle that security must be proactively integrated into the design of a system. While examples exist in the research literature of systems that have been designed for security, there are few examples of such systems deployed in the real world. Economic and practical considerations force developers to abandon s...

Domain-specific generators will increasingly rely on Web-based applets for declarative specifications of target applications. Applets will communicate with generators via servers to produce customized code on demand. Critical to the success of this approach will be domain-specific design wizards, tools that guide users in their selection of components for constructing particular applications. I...

The amount of multimedia information transmitted through the web is very high and increasing. Generally, this kind of data is not correctly protected, since users do not appreciate the amount of information that images and videos may contain. In this work, we present architecture for managing safely multimedia transmission channels. The idea is to encrypt or encode images and videos in an effic...

The capabilities of multimodal applications running on the web are well delineated since they are mainly constrained by what their underlying standard mark up language offers, as opposed to hand-made multimodal applications. As the experience in developing such multimodal web applications is growing, the need arises to identify and define major design options of such application to pave the way...

Ever-growing data volumes demand for storage systems beyond current file systems abilities, particularly, a powerful querying capability. With the rise of XML, the database community has been challenged by semi-structured data processing, enhancing their field of activity. Since file systems are structured hierarchically they can be mapped to XML and as such stored in and queried by an XML-awar...

Mobile software industry is suffering from the illegal usage of the software. PKI will not be a solution for small software distribution. We introduce a lightweight but safe method to prevent illegal usage of mobile phone software, by instrumentation on binary for device-identity check. The method is now being implemented on a presumable code on demand (COD) server for WIPI (Wireless Internet P...