Results 1 - 10 of 25

• Advanced Tutorial on Wireless Communication and Electronic Tracking: Introduction
  5/9/2019 - Training materials
  This tutorial provides an advanced discussion of the available CT technologies, operating characteristics and general system performance considerations with descriptions of specific uses for primary and secondary communications.
• Technology News 546 - Medium Frequency Mine Emergency Communications - An Emerging Technology
  2/1/2012 - Technology News
  Medium frequency communications systems do not require a powered underground infrastructure to be installed for operation, and may therefore provide a higher degree of survivability after a mine disaster than other types of systems.
• Advanced Tutorial on Wireless Communication and Electronic Tracking: Communication System Performance
  5/9/2019 - Training materials
  Section 2 of the OMSHR advanced tutorial on wireless communication and electronic tracking covering communication system performance.
• Simulation and Measurement of Medium-Frequency Signals Coupling From a Line to a Loop Antenna
  10/1/2016 - Peer reviewed journal articles
  An article which presents the simulation and measurement results of recent NIOSH research aimed at investigating medium frequency coupling between a transmission line and a loop antenna in an underground coal mine.
• Medium Frequency Radio System Modifications for Refuge Chamber Situational Awareness
  7/19/2016 - Contracts and cooperative agreements
  A contract to modify medium frequency radio systems to improve refuge chamber situational awareness in an underground coal mine.
• Full-Wave Modeling of MF Propagation
  7/19/2016 - Contracts and cooperative agreements
  A contract to develop models of MF propagation in mines based on the results simulated through full-wave electromagnetic models.
• Develop a Means to Model Network Performance Using Network Simulation Tools
  7/18/2016 - Interagency agreements
  An interagency agreement to develop modeling and simulation tools to evaluate the performance of underground mine wireless communications networks.
• Communication and Hazard Monitoring in Bleeders and Remote Workings
  7/18/2016 - Contracts and cooperative agreements
  A contract to extend communication and hazard monitoring into bleeders or other remote workings in an active underground coal mine.
• Medium Frequency Propagation Characteristics of Different Transmission Lines in an Underground Coal Mine
  2/1/2015 - Peer reviewed journal articles
  In this study, the propagation characteristics of three types of medium frequency transmission lines in two layouts were obtained in an effort to understand the propagation characteristics of different transmission lines in different locations.
• A Hybrid Approach for Efficient Modeling of Medium-Frequency Propagation in Coal Mines
  2/1/2015 - Peer reviewed journal articles
  An article introducing a hybrid approach to modeling medium-frequency communications in coal mines.