Find information on common issues.
Ask questions and find answers from other users.
Suggest a new site feature or improvement.
Check on status of your tickets.
Note: Results do not include pending, unpublished, and some private items.
Whether you're simulating the electronic structure of a carbon nanotube or the strain within an automobile part, the
calculations usually boil down to a simple matrix equation,
Ax = f. The faster you can fill the
matrix A with the coefficients for your partial
differential equation (PDE), and the faster you can solve for
the vector x given a forcing function f, the faster you have your overall solution. Things get interesting when the matrix A is too large to fit in the memory available on one machine, or when the coefficients in A cause the matrix to be ill-conditioned.
Ax = f
Many different algorithms have been developed to map a PDE onto a matrix, to pre-condition the matrix to a better form, and to solve the matrix with blinding speed. Different algorithms usually exploit some property of the matrix, such as symmetry, to reduce either memory requirements or solution speed or both.
Learn more about algorithms from the many resources on this site, listed below.
Quantum Corrections for Monte Carlo Simulation
Ranking is calculated from a formula comprised of user reviews and usage data. Learn more ›
05 Jan 2006 | Online Presentations | Contributor(s): Umberto Ravaioli
Size quantization is an important effect in modern scaled devices. Due to the cost and limitations of available full quantum approaches, it is appealing to extend semi-classical simulators by adding …
VolQD: Graphics Hardware Accelerated Interactive Visual Analytics of Multi-million Atom Nanoelectronics Simulations
13 Dec 2005 | Online Presentations | Contributor(s): Wei Qiao
In this work we present a hardware-accelerated direct volume rendering system for visualizing multivariate wave functions in semiconducting quantum dot (QD) simulations. The simulation data …
First Principles-based Atomistic and Mesoscale Modeling of Materials
01 Dec 2005 | Online Presentations | Contributor(s): Alejandro Strachan
This tutorial will describe some of the most powerful and widely used techniques for materials modeling including i) first principles quantum mechanics (QM), ii) large-scale molecular dynamics (MD) …
Bandstructure in Nanoelectronics
01 Nov 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
This presentation will highlight, for nanoelectronic device examples, how the effective mass approximation breaks down and why the quantum mechanical nature of the atomically resolved material needs …
Modeling and Simulation of Sub-Micron Thermal Transport
26 Sep 2005 | Online Presentations | Contributor(s): Jayathi Murthy
In recent years, there has been increasing interest in understanding thermal phenomena at the sub-micron scale. Applications include the thermal performance of microelectronic devices, …
21 Jul 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Quantum Dots are man-made artificial atoms that confine electrons to a small space. As such, they have atomic-like behavior and enable the study of quantum mechanical effects on a length scale that …
Parallel Computing for Realistic Nanoelectronic Simulations
12 Sep 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Typical modeling and simulation efforts directed towards the understanding of electron transport at the nanometer scale utilize single workstations as computational engines. Growing understanding of …
Review of Several Quantum Solvers and Applications
11 Jun 2004 | Online Presentations | Contributor(s): Umberto Ravaioli
Numerical Aspects of NEGF: The Recursive Green Function Algorithm
14 Jun 2004 | Online Presentations | Contributor(s): Gerhard Klimeck
Computational Methods for NEMS
16 Jun 2004 | Online Presentations | Contributor(s): Narayan Aluru
Scientific Software Development
29 Jun 2005 | Online Presentations | Contributor(s): Clemens Heitzinger
The development of efficient scientific simulation codes poses a wide range of problems. How can we reduce the time spent in developing and debugging codes while still arriving at efficient …
NCN Cyberinfrastructure Overview
21 Jun 2005 | Online Presentations | Contributor(s): Gerhard Klimeck
Presentation of the NCN cyberinfrastructure to the June 2005 NSF review team. The nanoHUB development over 12 months will be presented in a broad overview.
HPC and Visualization for multimillion atom simulations
This presentation gives an overview of the HPC and visulaization efforts involving multi-million atom simulations for the June 2005 NSF site visit to the Network for Computational Nanotechnology.
NEMO 1-D: The First NEGF-based TCAD Tool and Network for Computational Nanotechnology
28 Dec 2004 | Online Presentations | Contributor(s): Gerhard Klimeck
Nanotechnology has received a lot of public attention since U.S. President Clinton announced the U.S. National Nanotechnology Initiative. New approaches to applications in electronics, materials, …
Scientific Computing with Python
24 Oct 2004 | Online Presentations | Contributor(s): Eric Jones, Travis Oliphant
INSTRUCTORS: Eric Jones and Travis Oliphant. Sunday, October 24, 9:00 a.m. - 5:00 p.m. Room 322, Stewart Center Python has emerged as an excellent choice for scientific computing because of its …
Turbocharge Your Scientific Applications with Scripting
29 Apr 2004 | Online Presentations | Contributor(s): Michael McLennan
Scientific applications are built with great care and attention to the core simulation algorithms, often with some input/output added as an afterthought. Instead, you can create a much more powerful …
nanoHUB.org, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies.