Tag

matter

3 datasets
  • Air Quality System (AQS) ambient observations

    Offsite — Ambient PM2.5 (particulate matter less than 2.5 microns) concentrations from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). Additional facts from data.gov Dataset Summary Date Released: 04/10/2008 Date Updated: 06/04/2009 Time Period: 1 year (2007) Data.gov Data Category Type: Raw Data Catalog Frequency: Daily (or 1 day ...
  • Air Quality System (AQS) ambient observations

    Offsite — Ambient PM2.5 (particulate matter less than 2.5 microns) concentrations from the national ambient air quality monitoring networks stored in the Air Quality System (AQS). Additional facts from data.gov Dataset Summary Date Released: 04/15/2008 Date Updated: 06/04/2009 Time Period: 1 year (2008) Data.gov Data Category Type: Raw Data Catalog Frequency: Daily (or 1 day ...
  • Condensed Matter Collaboration Network

    Free Download — Description: Data describes a collaboration network of scientists posting preprints on the condensed matter archive at www.arxiv.org. This version is based on preprints posted to the archive between January 1, 1995 and March 31, 2005. The network is weighted, with weights assigned as described in M. E. J. Newman, Phys. Rev. E 64, 016132 (2001). These data can be cited ...