Joshua Stillerman

Research Engineer





BS, Computer Science, University of Wisconsin Madison


Data management; data acquisition; data provenance; remote collaboration.


Data Acquisition / Data Management: One of the primary authors of the MDSplus data system. This suite of tools, used by more than 40 fusion experiments world wide, provides data acquisition, experiment workflow, data organization, and remote data access. The focus is on allowing users to structure their data and metadata so that they can retain their usefulness over long periods of time.

Data Provenance: The Metadata Ontology Provenance (MPO) project, is a three-institution collaboration, which has built a tool to track the provenance of computed results. Users construct directed acyclic graphs as side effects of running their computational workflows. These graphs can then be annotated, and shared among collaborators. The provenance of data products is directly represented by the graphs.


M. Greenwald, J. Stillerman, J. Wright, G. Abla, R. Chanthavong, R, D. Schissel, D, A. Romosan, A. Shoshani, “Documenting scientific workflow: the metadata, provenance and ontology project”, Bulletin of the American Physical Society, vol. 59, 2014

D. Schissel, G. Abla, S. Flanagan, M. Greenwald, X. Lee, A. Romosan, A. Shoshani, J. Stillerman,J. Wright, “Automated metadata, provenance cataloging and navigable interfaces: Ensuring the usefulness of extreme-scale data”, Fusion Engineering and Design, vol. 89, issue 5, 2014, pp. 745-749.

J. Stillerman, W. Burke, B. Labombard, “An optical timing verification system for Alcator C-Mod”,Fusion Engineering and Design, Volume 85, Issues 3-4, Proceedings of the 7th IAEA Technical Meeting on Control, Data Acquisition, and Remote Participation for Fusion Research, July 2010, Pages 367-369.

J. Stillerman, D. Baron, T. Fredian, M. Greenwald, H. Schulzrinne, “Communications fabric for scientific collaboration”, Fusion Engineering and Design, Volume 83, Issues 2-3, Proceedings of the 6th IAEA Technical Meeting on Control, Data Acquisition, and Remote Participation for Fusion Research, April 2008, Pages 476-479

T. Fredian, J. Stillerman “MDSplus, Current developments and future directions”, Fusion Engineering and Design, Vol 60, 2002, pp 229-233.

J. Stillerman, T. Fredian, M. Greenwald, “WWW interfaces for runtime relational database applications”, Fusion Engineering and Design, vol. 48, 2000, pp. 63-68.

J. Stillerman, T. Fredian, “The MDSplus data acquisition system, current status and future directions”, Fusion Engineering and Design vol. 43, 1999, pp. 301-308.