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The HUBzero cyberinfrastructure lets scientific researchers work together online to develop simulation and modeling tools. Other researchers can then access the resulting tools using an ordinary Web browser and launch simulation runs on the national Grid infrastructure, without having to download or compile any code.
In 2002, the National Science Foundation established the Network for Computational Nanotechnology (NCN), a network of universities supporting the National Nanotechnology Initiative by bringing computational tools online, making the tools easy to use, and supporting the tools with educational materials. Along the way, NCN created a unique cyberinfrastructure(More)
Software is increasingly important to the scientific enterprise and science funding agencies are increasingly funding software work. Accordingly many different participants need insight into how to understand the relationship between software, its development, its use, and its scientific impact. In this paper we draw on interviews and participant(More)
A realistic 40 nm InAs high electron mobility transistor is studied using a two-dimensional, full-band, and atom-istic Schrödinger-Poisson solver based on the sp 3 d 5 s * tight-binding model. Bandstructure non-parabolicity effects, strain, alloy disorder in the InGaAs and InAlAs barriers, as well as band-to-band tunneling in the transistor OFF-state are(More)
SUMMARY: Red deer and wapiti are sympatric in part of Fiordland National Park. Caughley (197Ia), on the basis of Fisher's Discriminant Function of 22 skull measurements divided the mixed population of the eastern catchments into 38% red deer, 20% hybrids and 42 % wapiti. The same skulls were reexamined with 15 measurements, and re~evaluated against red deer(More)
The Network for computational nanotechnology (NCN) has developed a science gateway at nanoHUB.org for nanotechnology education and research. Remote users can browse through online seminars and courses, and launch sophisticated nanotechnology simulation tools, all within their Web browser. Simulations are supported by a middleware that can route complex jobs(More)
— Scientific workflow managers are powerful tools for handling large computational tasks. Domain scientists find it difficult to create new workflows, so many tasks that could benefit from workflow automation are often avoided or done by hand. Two technologies have come together to bring the benefits of workflow to the masses. The Pegasus Workflow(More)
SUMMARY In this paper, we described the benefits and the challenges of integrating existing scientific workflow technologies into science gateways. Scientific workflow managers are powerful tools for handling large computational tasks. Domain scientists find it difficult to create new workflows, so many tasks that could benefit from workflow automation are(More)
1. The Network for Computational Nanotechnology (NCN) The NCN was launched in September 2002 with a mission to create a network to serve the National Nanotechnology Initiative by providing live simulations and related services online. The NCN has a vision to be the place where theory, experiment, and computation meet and help move nanoscience to(More)