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Results 51 - 60 of 131
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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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9/25/2014 - Contracts and cooperative agreementsA contract to develop a Universal Signal Evaluation Package for 75- and 150-MHz bands, adapt a passive magnetic amplifier for 900-MHz, and investigate energy harvesting technologies.
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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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8/14/2014 - Contracts and cooperative agreementsA contract to incorporate a wireless base station into the MagneLink Magnetic Communication System (MCS) and to develop a mechanism that automatically activates a portable wireless text messaging device when a refuge chamber is opened or deployed.
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7/22/2014 - Interagency agreementsAn interagency agreement to design and develop a subterranean wireless electronic communications system for the U.S. Army.
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7/24/2013 - Research areasEmergency Communications and Tracking Topic Page
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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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9/18/2012 - Contracts and cooperative agreementsA contract to analyze, adapt, and test an existing ultra-low frequency (ULF), through-the-earth system for communication and tracking of underground mine personnel.
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9/17/2012 - Contracts and cooperative agreementsA contract to design, build, and demonstrate a battery-powered, through-the-earth wireless voice communication system for overburdens of up to 600 feet.
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Content source: National Institute for Occupational Safety and Health, Mining Program