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Timothy D. Andersen, Ph.D.



Ph.D. in Mathematics, August 2007.

Rensselaer Polytechnic Institute
Mathematical Sciences Dept.

Curriculum Vitae


About my work

My research interests focus on two areas of computational sciences and physics: (1) large scale Markov Chain Monte Carlo (MCMC) simulations with applications to statistical mechanics, lattice gauge simulations, high altitude fluid simulations, climate simulations, risk measurement for finance, and other simulations requiring large quantities of random numbers in parallel and (2) physics of gravitational theory including quantum gravity, dark energy, and dark matter. I believe that as exaflop scale supercomputing and teraflop personal supercomputing both become a reality with the spread of innovations in massively parallel vector processors such as GPGPUs and multicore processors, large scale simulations will become increasingly common and necessary to assess risk, test predictions of physical theories, and test engineering designs. My particular interest in gravitational theory will benefit enormously because of the need to do large N-body simulations on a galactic or cosmological scale as well as to test new theories of quantum gravity in computationally intensive lattice simulations. One of my research goals is to test new hypotheses of my own in gravitational theory such as the effects of de Sitter and anti-de Sitter symmetries on Einstein's theories. A second goal is to create tools that bring high performance computing (HPC) to the individual physicist who, at the current state of the art, must share HPC resources with many others. A third is to help groups of physicists address problems at a much higher level of complexity and fidelity with exaflop computing.

As an example of how my work might impact HPC, my current work for NASA involves random number generators for several types of new technologies such as GPGPUs and Intel MIC hardware which promises to be the next phase in HPC. Particle transport software such as Geant4 consumes vast quantities of random numbers to generate particle features from detections by, for example, the Alpha Magnetic Spectrometer (AMS) on the International Space Station which is a particle detector for cosmic rays designed to look for antimatter, dark matter, and strangelets. Satellite technology is insufficient to power the supercomputer the AMS requires, but new technologies could, potentially, reduce the power consumption so such a device could be placed on a satellite, freeing space on the ISS for other experiments. In order to meet the requirements of running Geant4 on new technologies, however, new random number generators (RNGs) need to be developed that generate high quality solutions. Our high quality random number generator project addresses this need by developing and testing different types of RNGs for the quality and quantity necessary to do HPC on these technologies.

Dissertation

Trapped Slender Vortex Filaments in Statistical Equilibrium

Successfully defended with no revisions on 14 May 2007

Journal Papers

Grants

  • Principal Investigator on NASA SBIR Grant Phase I 2012 NNX12CD32P, $125K, 2/12-8/12.

Patents

  • Efficient Lightweight Information Dissemination Algorithm for Mobile Wireless Ad Hoc Networks, US Patent 7,420,954, Sept. 2008.
  • Interference-Resilient Joint MAC and Routing Design for Wireless Ad hoc Networks, US Patent 7,570,593, Aug. 2009.

Working Papers and Technical Reports

Talks

Currently Working On

  • Random number generation for Exaflop, GPGPU and Intel MIC computing.
  • A book on vortex statistics with (former) adviser Chjan Lim for Springer Business+Media.

Research Interests

  • Feynman-Kac path integral approaches to vortex filaments, plasmas, and biochemical electrostatics.
  • Quantum interpretation problem and the arrow of time.
  • Quantum gravity solutions that involve extra dimensions.
  • The accelerating expansion of the universe in a de Sitter framework.
  • Dark matter and the Dirac equation.

Teaching

Links

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Updated 17 April 2012.

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cv3.pdf
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Tim Andersen,
Oct 11, 2011 8:15 AM
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Tim Andersen,
May 24, 2010 11:28 AM
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Tim Andersen,
May 24, 2010 11:29 AM
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paper1.pdf
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Tim Andersen,
Nov 21, 2008 9:12 AM
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Tim Andersen,
Nov 21, 2008 9:12 AM
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paper3.pdf
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Tim Andersen,
Nov 21, 2008 9:12 AM
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Tim Andersen,
Nov 21, 2008 9:13 AM