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This paper defines and describes the properties of a multicast virtual topology, the M-array and a resource-efficient variation, the REM-array. It is shown how several collective operations can be implemented efficiently using these virtual topologies, ...

As network capacities increase, wide-area distributed parallel computing may become feasible. This paper addresses one of the issues involved in using an asynchronous transfer mode (ATM) network for such a purpose that of developing an appropriate call ...

The task of fitting smoothing spline surfaces to meteorological data such as temperature or rainfall observations is computationally intensive. The Generalised Cross Validation (GCV) smoothing algorithm is O(n³) computationally, and memory requirements ...

Remotely sensed imagery has been used for developing and validating various studies regarding land cover dynamics. However, the large amounts of imagery collected by the satellites are largely contaminated by the effects of atmospheric particles. The ...

The Living Textbook creates a unique learning environment enabling teachers and students to use educational resources on multimedia information servers, supercomputers, parallel databases, and network testbeds. We have three innovative educational ...

The purpose of the Pittsburgh Supercomputing Center's High School Initiative was to motivate students to pursue careers in science, mathematics, engineering and computer science. The initiative generated excitement among teachers and their students by ...

Technology is used to empower students to go beyond traditional limitations. EarthVision provides the opportunity to participate in an authentic research environment enables the students to develop a sense of self worth and esteem established in the ...

The paper explains what a cellular automaton is and why schools would want to integrate the study of cellular automata into their curricula. Examples are given and suggestions for sample exercises follow. Each example is given a title, a discipline to ...

We feel strongly that a contemporary introductory course in machine organization and assembly language should focus on the essentials of how computers execute programs, and not be distracted by the complications of the extraordinarily sophisticated ...

This paper describes a set of tools for annotating and exploring program source code on the World Wide Web (WWW). These tools are part of a project to build an electronic textbook for parallel programming that exploits the Caltech Archetypes model of ...

Results from the development and teaching of a senior-level undergraduate multidisciplinary course in high performance computing are presented. Having been taught four times, there are several "Lesson Learned" presented in this paper. Help from the ...

Currently, most approaches to retrieving textual materials from scientific databases depend on a lexical match between words in usersý requests and those in or assigned to documents in a database. Because of the tremendous diversity in the words people ...

The National HPCC Software Exchange is a collaborative effort by member institutions of the Center for Research on Parallel Computation to provide network access to HPCC-related software, documents, and data. Challenges for the NHSE include identifying, ...

A statistical mechanical approach to the protein folding problem is developed based on computer simulations. The properties of proteins related to conformation and folding are determined from the density of states of the protein. A new simulation ...

Real-time access to large scientific and heterogeneous environmental data has prompted the need for the development of tools allowing efficient data storage, data compression, interactive data browsing, data manipulation, data visualization, searching, ...

The purpose of the molecular interaction program DOT (Daughter of Turnip) is rapid computation of the electrostatic potential energy between two proteins or other charged molecules. DOT exhaustively tests all six degrees of freedom, rotational and ...

We discuss data production rates and their impact on the performance of scientific applications using parallel computers. On one hand, too high rates of data production can be overwhelming, exceeding logistical capacities for transfer, storage and ...

The Smith-Waterman algorithm is a computationally-intensive string-matching operation that is fundamental to the analysis of proteins and genes. In this paper, we explore the use of some standard and novel techniques for improving its performance. We ...

The problem of determining the evolutionary history of species in the form of phylogenetic trees is known as the phylogeny problem. We present a parallelization of the character compatibility method for solving the phylogeny problem. Abstractly, the ...