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The FOXBOX system puts in practice the black box representation of symbolic objects and provides algorithms for performing the symbolic calculus with such representations. Black box objects are stored as functions. For instance: a black box polynomial is a procedure that takes values for the variables as input and evaluates the polynomial at that given(More)
The black box representation of a multivariate polynomial is a function that takes as input a value for each variable and then produces the value of the polynomial. We revisit the problem of computing the greatest common divisor (GCD) in black box format of several multivariate polynomials that themselves are given by black boxes. To this end an improved(More)
WSXL (Web Services Experience Language) is a Web services centric component model for interactive Web applications, that is, for applications that provide a user experience across the Internet. WSXL is designed to achieve two main goals: enable businesses to deliver interactive Web applications through multiple distribution channels and enable new services(More)
The dominant models for inventory control of repairable items, both in the literature and in practical applications, are based on the assumption of ample repair capacity. This assumption can introduce a serious underestimation of the spare parts requirements in systems with high repair facility utilization, as is typical in industry. In this paper, we(More)
DSC is a general purpose tool that allows the distribution of a computation over a network of Unix workstations. Its control mechanisms automatically start up daemon processes on the participating workstations in order to communicate data by the standard IP/TCP/UDIP protocols. The user's program distributes either remote procedure calls or source code of(More)
Web Services for Remote Portals (WSRP) are visual, user-facing web services centric components that plug-n-play with portals or other intermediary web applications that aggregate content or applications from different sources. They are designed to enable businesses to provide content or applications in a form that does not require any manual content-or(More)
New features of our DSC system for distributing a symbolic computation task over a network of processors are described. A new scheduler sends parallel subtasks to those compute nodes that are best suited in handling the added load of CPU usage and memory. Furthermore, a subtask can communicate back to the process that spawned it by a co-routine style(More)