TRAIL Metrics

TRAIL statistics are updated every six months, generally in January and July.  Some statistics reported below are for the most recent six months, while others are cumulative.

The statistics below are current as of January 2, 2020.

Cumulative Statistics

Number of TRAIL records in the HathiTrust Digital Library  56,051
Number of TRAIL records in the University of North Texas Digital Library  27,184
Total number of TRAIL records  83,235

 

Statistics for the most recent six-month period (July - December 2019)

Number of technical reports processed for digitization  1,034
Usage of TRAIL content held at the University of North Texas  263,078
Number of TRAIL search interface sessions  2,462
Number of TRAIL search interface users  1,919

 

Current Statistics (as of Jan. 2, 2020)

Number of TRAIL institutional members  51
Number of TRAIL personal members  13

 

Definitions

Number of reports processed for digitization

The number of reports for which the University of Arizona has created catalog/metadata records prior to those reports being digitized and eventually made publicly available.

 

Usage of UNT-located TRAIL content

The number of uses of the TRAIL reports stored in the University of North Texas (UNT) Digital Library.  It is not yet technically possible to provide similar usage statistics for the TRAIL content stored in the HathiTrust Digital Library, TRAIL’s other digitization/preservation partner.

 

Number of TRAIL search interface sessions

The number of times individual IP/browser combinations accessed the TRAIL search interface for up to 30 minutes.

 

Number of TRAIL search interface users

The number of individual IP/browser combinations that access the TRAIL search interface.

TRAIL - Technical Report Archive and Image Library - logo

Search U.S. government technical reports issued primarily prior to 1976 and digitized by TRAIL.