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- Equipment, tools, and parts:
- Through-the-earth communications systems
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Results 11 - 20 of 41
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7/19/2016 - Contracts and cooperative agreementsA contract to explore a new communication technology that re-uses undersea modem technology and concepts for seismic communication within the mining industry.
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7/16/2016 - Contracts and cooperative agreementsA contract to develop an Advanced Software Radio (ASR) for through-the-earth communication with the intent of significantly improving realiability of TTE links in the working areas of coal mines and extending range.
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11/20/2015 - Contracts and cooperative agreementsA contract to develop new antenna configurations to improve performance and utility of through-the-earth (TTE) communications systems once deployed in underground coal mines.
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11/20/2015 - Contracts and cooperative agreementsA contract to develop and test an enhanced magnetics-based communications waveform with increased ability to provide communications in the presence of ambient noise and interference in order to extend existing magnetics-based technologies.
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8/18/2015 - News and announcementsA feature story about through-the-earth communcations technologies available for mine emergencies.
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10/6/2014 - Contracts and cooperative agreementsA contract to extend the operational range of a through-the-earth communications system while maintaining the portability and permissibility of the subsurface unit.
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10/1/2014 - Peer reviewed journal articlesAn analyis of TTE measurement data collected from 94 mines in order to determine the apparent conductivity of the overburden based on three different models: a homogenous half-space model, a thin sheet model, and an attenuation factor or Q-factor model.
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8/15/2014 - Contracts and cooperative agreementsA contract to determine the factors that most affect signal transmission and reception for through-the-earth communication systems.
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12/1/2012 - Technology NewsA technology to provide a two-way communications system to improve miners' ability to communicate from underground to surface.
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9/18/2012 - Contracts and cooperative agreementsA contract to design a prototype two-way, through-the-earth (TTE) emergency communication system, fabricate the hardware, and test the system at an underground coal mine.
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Content source: National Institute for Occupational Safety and Health, Mining Program