A software interceptor is a procedure or object that interposes itself between an invoking client and an invoked server software entity. Procedural interceptors can redirect procedure invocations to alternative procedures that are selected dynamically at run time. Procedural interceptors are useful for program profiling, tracing, dynamic delegation of operation implementation, and interactive d...

The performance of client/server systems is complex and highly dependent on a number of interacting issues such as workloads, processor interconnection, mapping issues, processor type and communications medium making the realisation of a fast, efficient implementation difficult and time consuming. This can be further complicated if computer systems are not exclusively dedicated to one processin...

Availability of both massive datasets and computing resources have made machine learning and predictive analytics extremely pervasive. In this work we present a synchronous algorithm and architecture for distributed optimization motivated by privacy requirements posed by applications in machine learning. We present an algorithm for the recently proposed multiparameter-server architecture. We co...

The proliferation of web based distance education courses in recent years poses unique challenges for the teaching of disciplines involving a high level of practical work. Increasingly web based engineering courses are on offer, augmented by the provision of remote experimentation laboratories. The degree of functionality and level of user access to these remote laboratories has evolved in rece...

A major challenge facing the MLS community is to find ways to provide the information and connectivity that DoD users demand without either imposing unacceptable security risks or requiring expensive hardware and software that fails to mesh with commercial off-the-shelf (COTS) applications. This paper proposes, very briefly, an architecture that meets these goals using only a small number of re...

This paper presents a methodology for using a generic data-driven spatial access method as a communication mechanism for vario-scale data in a server-client setting. As a complete data set is often quite large, it is managed at the server side and supporting different scale levels is important. We show that a generic R-tree like grouping method, commonly used for efficiently organizing and retr...

Notification and filtering mechanisms can make email more enjoyable on mobile and other constrained devices (such as those with limited screen sizes, memory, data transfer rates, etc.). Notifications make the client aware of significant events (such as the arrival of new mail) so it can react (such as by fetching interesting mail immediately). Filtering reduces the visible mail to a set of mess...

We describe an open source, portable, JavaScript-based genome browser, JBrowse, that can be used to navigate genome annotations over the web. JBrowse helps preserve the user's sense of location by avoiding discontinuous transitions, instead offering smoothly animated panning, zooming, navigation, and track selection. Unlike most existing genome browsers, where the genome is rendered into images...