Results 111 - 120 of 245

• Through-The-Earth Wireless Real-Time Two-Way Voice Communications
  9/17/2012 - Contracts and cooperative agreements
  A contract to design, build, and demonstrate a battery-powered, through-the-earth wireless voice communication system for overburdens of up to 600 feet.
• Passive Fiber Optic System for Locating, Tracking, and Communicating with Personnel in Coal Mines
  9/17/2012 - Contracts and cooperative agreements
  A contract to develop and demonstrate a modified, fiber optic-based perimeter security system to track personnel in an underground coal mine.
• Wireless Mesh Mine Communication System
  9/17/2012 - Contracts and cooperative agreements
  A contract to design, adapt, construct, install, and evaluate a wireless mesh communication network in an underground coal mine.
• Mine Communications and Tracking Glossary
  9/17/2012 - Dictionaries and glossaries
  Mine Communications and Tracking Glossary
• Training for Safety in Emergencies Inoculating for Underground Coal Mine Emergencies
  11/1/2011 - Peer reviewed journal articles
  Emergency training for miners can use inoculation theory, which explains how people can resist persuasion attempts by preparing counterarguments in advance. The theory may be used to prepare workers to react quickly by preparing responses in advance.
• Nonverbal Communication for Mine Emergencies
  11/1/2011 - Reports of Investigations, Training materials
  Nonverbal Communication for Mine Emergencies is a training program that teaches miners a series of nonverbal hand signals to use in the event of an emergency. These hand signals can be used by miners if they are unable to communicate verbally.
• Technology News 544 - New Measurement Tool to Validate Wireless Communications and Tracking Radio Signal Coverage in Mines
  10/1/2011 - Technology News
  This technology is used to map communications and tracking coverage in underground mines. It is important to know coverage of these systems during a mine emergency.
• Technology News 543 - Reverse Implementation of Radio Frequency Identification (RFID) Technology for Personnel Tracking in Underground Mines
  9/1/2011 - Technology News
  Possible benefits of the use of reverse RFID for personnel tracking are: improvements in accuracy, the ability to interface to a variety of mine communications infrastructures, better system survivability, and easier installation and maintenance.
• Straight Line Walking and Path-Turn Identifying Algorithms for a Tracking Device Used in Underground Mines
  1/1/2010 - Conference papers
  This paper describes two algorithms that can provide greater accuracy for underground miner tracking systems.
• Algorithms to Identify Its Own and Surrounding Tunnels for an Underground Tracking Device
  1/1/2010 - Conference papers
  This paper introduces algorithms to locate miners with no need for external reference sensors. There are definitions of useful mathematical operations that can be performed on the node coordinates and includes a description of the algorithms.