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The University of Tennessee

Robert Stewart Web Page

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Dr. Robert Stewart Research Page

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Other links of interest - Spatial Analysis and Decision Assistance; Oak Ridge National Lab; Geographic Information Science and Technology Group

Spatial Analysis And Decision Assistance

Spatial Analysis and Decision Assistance (SADA) is free software that incorporates tools from environmental assessment fields into an effective problem solving environment. These tools include integrated modules for visualization, geospatial analysis, statistical analysis, human health risk assessment, ecological risk assessment, cost/benefit analysis, sampling design, and decision analysis. The capabilities of SADA can be used independently or collectively to address site specific concerns when characterizing a contaminated site, assessing risk, determining the location of future samples, and when designing remedial action. More information and a fully functional freeware version is available on the at Spatial Analysis and Decision Assistance . SADA is developed in The Institute for Environmental Modeling at the University of Tennessee .

SADA has increased in popularity over the last several years. As of the end of November 2005 we have seen over 15000 downloads of Version 3 and 4. Users are found around the world in over 150 countries. Significant sponsors, contributors and collaborators past, present, and near future include (in no order): Tom Purucker (UT), Debra Stewart (UT), Fred Dolislager (UT), Dr. Chris Welsh (UT), Leslie Galloway (UT), Dr. Louis Gross (UT), Dr. George Powers (NRC), Brian Cooper (Region IV EPA), John Bing-Canar (Region IV EPA), Tim Drexler (Region IV EPA), Brenda Jones (Region IV EPA), Deane Crumbling (EPA Technology Innovation Office), Dan Powell (EPA Technology Innovation Office), Larry Zaragosa (EPA HQ), Wilson McGinn (Oak Ridge National Lab), Dr. Brad Lyon (BWXT), Dr. Pierre Goovaerts (Biomedware/University of Michigan), Dr. Carl Gogolak (DOE), Jim Davidson (Davidson & Davidson/PNNL), Robert Johnson (Argonne National Lab), John Roberts-Niemann (Region IV EPA), and John Wilson (Pacific Northwest National Lab). I'm sure I've left many important people off. Email me at stewartrn@ornl.gov with additions.

Population Densities Tables

I am currently engaged in population dynamics and distribution research at the ORNL as part of the Population Densities Table project (PDT).The Geographic Information Science and Technology (GIST) Group at Oak Ridge National Laboratory (ORNL) has long been engaged in developing population databases as part of the LandScan population distribution and dynamics program. Recent research and development has focused on higher resolution population distribution modeling based on the demographic and socio-cultural attribution of the population data. As part of this ongoing effort, we are developing the PDT, a set of national databases, which model density by the socio-cultural activities and associated facility spaces that define normal patterns of life. Such a modeling exercise involves automated collection, and subsequent fusion of, information from open, published sources including academic journals, official government statistics, websites of humanitarian organizations, corporate and university web pages, buildings databases, tourism brochures, reported field observations, and NGO reports. The result is a collection of data that provide a baseline, spatiotemporal and demographic snapshot of facility occupancy levels for nighttime and daytime periods at a higher spatial resolution.

Pesticide Exposure Modeling Software

This was a small project where I assisted the Oak Ridge National Laboratory with some basic software developoment. The software provided some basic exposure modeling capabilities for pesticide use. It was sponsored by the EPA through Oak Ridge National Laboratory. Software was eventually bundled and used in developing South American countries struggling with assessing the impact of pesticide contamination in their natural resources. Collaborators included Anthony Armstrong (Life Sciences Division).

Terminated License Tracking System

I serve as the project technical lead on this Oak Ridge National Laboratory project with the Nuclear Regulatory Commission. This project is largely an IT effort. The purpose of this project is to track, log, and disseminate to the public throught the internet the activities associated with a past license terminations. Collaborators include John Buckley (NRC), Dr. Po Yung-Lu (ORNL), Fred Baes (ORNL), Debra Stewart (UT), JoAnn Mandry(IIA).

Complex Sites Tracking System

I serve as the project technical lead on this Oak Ridge National Laboratory project with the Nuclear Regulatory Commission. This project is largely an IT effort as well . The purpose of this project is to track, log, and disseminate to the public through the internet the activities associate with licensees currently in decomissioning. Collaborators include John Buckley (NRC), Dr. Po Yung-Lu (ORNL), Fred Baes (ORNL), Debra Stewart (UT), JoAnn Mandry(IIA).

FGR13

This was a project at contributed some software development to at the Oak Ridge National Laboratory. FGR13CD is a viewer of the risk coefficients tabulated in Federal Guidance Report 13 and the age-specific dose coefficients calculated during the course of preparing Report 13. Federal Guidance Report 13 was a compilation of cancer risk coefficients for environmental exposure to radionuclies. For more information on this and on Federal Guidance Report 13 please click here or here.

Grants and Contracts History

The following is a list of grants and contracts I have served as either principle investigator (PI) or co-PI.

  • Nuclear Regulatory Commission/ORNL, PY Lu, R Stewart, “Complex Sites Tracking System”, $991k, 2006-2010, (technical lead)
  • Nuclear Regulatory Commission (NRC-06-066). R. Stewart, L. J. Gross and T. Purucker. "Sparse Radiological Subsurface Survey Data Analysis." 2006-2009. $980K. (PI).
  • Nuclear Regulatory Commission (NRC-04-02-057). R. Stewart, L. J. Gross and T. Purucker. "Bayesian subsurface radiological surveying and analysis." 2002-2005. $948K (PI).
  • Swedish EPA/Swedish Geotechnical Institute, Spatial Risk Considerations, $10K, 10/05-1/06 (participant)
  • Navy/TetraTech, US Naval Facilities Engineering Command (NAVFAC) SADA Applications Workshop (R01-1086-115), $10K, 4/05-8/05 (co-PI)
  • US Department of Transportation/Research and Special Program Administration/Volpe Center, EPA Region 5 FIELDS Technical Support (R01-1086-111), $50K, 10/04-4/05 (PI)
  • US Department of Transportation/ Research and Special Program Administration /Volpe Center, EPA Region 5 FIELDS Technical Support (R01-1086-090), $50K, 1/04-7/04 (PI)
  • US EPA Region 5 Superfund Division Innovative Technology Evaluation (R01-3515-066), $200K, 10/02-7/03 (co-PI)
  • US EPA Region 5 Superfund Division Innovative Technology Evaluation (R01-3515-066), $200K, 10/01-9/02 (co-PI)
  • US EPA Region 5 Superfund Division Innovative Technology Evaluation (R01-3515-066), $100K, 4/01-9/01 (co-PI)
  • US EPA Region 5 Water Division, SADA/FIELDS Technology Development (R01-3515-066), $65K, 9/00-2/01 (co-PI)
  • US EPA Region 5 Water Division, SADA/FIELDS Technology Development (R01-3515-066), $50K, 7/00-12/00 (co-PI)
  • US EPA R5 Water Division, SADA/FIELDS Technology Development (R01-3515-066), $70K, 2/00-9/00 (co-PI)
  • US EPA Office of Research and Development National Center for Environmental Research and Quality Assurance, SADA/FIELDS Development- Technology Innovation Office, $50K, 10/99-7/00 (co-PI)