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7/19/2016 - Contracts and cooperative agreementsA contract to develop models of MF propagation in mines based on the results simulated through full-wave electromagnetic models.
2/1/1982 - Contract reportsThe objective of this project was to perform a preliminary study to determine the desirability/practicality of burying the communication cables in underground mines in order to protect then from the effects of fires and explosions. We found the overall ...
10/1/1980 - Contract reportsThe object of this program was to extend the capabilities of visual paging systems both in size and functions in mines. The system developed uses the mine pager phone line for communication, monitoring, and remote control. The system was designed to be ...
10/1/1978 - Conference papersAn analysis is made of the trolley line as a communications line, and methods of improving its characteristics are discussed.