Results 151 - 160 of 220

• A Miniature Data Acquisition System with LED Warning Lights
  9/1/2003 - Conference papers
  Researchers have developed a miniature data acquisition system (MIDAS) that can measure resistance changes and temperature, store data for later retrieval, and illuminate LED lights. This instrument can be used with strain-gaged bolts, cable bolts, CSIR...
• New Tools for Roof Support Evaluation and Design
  8/1/2003 - Conference papers
  This paper describes two tools NIOSH developed. The miniature data acquisition system (MIDAS) could make geotechnical instruments in underground mines more feasible. The rock strain strip, together with MIDAS, more accurately measures rock movement.
• Recent National Institute for Occupational Safety and Health Research Using Ground Penetrating Radar for Detection of Mine Voids
  7/1/2003 - Conference papers
  This study indicates that it may be possible to use ground penetrating radar (GPR) for initial underground mine studies followed by directional drilling to accurately delineate the extent and position of adjacent abandoned mine workings.
• Technology News 501 - Measuring Very Low Air Velocities in Underground Metal/Nonmetal Mines
  1/1/2003 - Technology News
  Conventional anemometers (e.g., vane) are capable of accurately measuring air velocities only above 100 ft/min. This research investigated other anemometry technology to detect low air velocities in the range of 0-100 ft/min. Two different portable ultr...
• Performance Evaluation of a Dust-Dispersion Model for Haul Trucks
  1/1/2003 - Peer reviewed journal articles
  This paper presents the results of testing of the Dynamic Component Program model with the ISC3 model of predicting dispersion of dust from haul trucks at two surface mine sites.
• Neural Network Application to Mine-Fire Diesel-Exhaust Discrimination
  10/1/2002 - Conference papers
  Results of experiments to train a neural network to detect coal and styrene-butadiene-rubber conveyor belting fires. Six of the seven experiments were conducted in the presence of diesel exhaust.
• Performance of a Prototype Personal Dust Monitor for Coal Mine Use
  10/1/2002 - Conference papers
  The personal dust monitor (PDM) is a sampling device developed for measuring the personal exposure to coal mine dust of mine workers.
• Technology News 498 - Multiple Fire Sensors for Mine Fire Detection and Nuisance Discrimination
  9/1/2002 - Technology News
  In an effort to determine the effectiveness of multiple types of fire sensors for early and reliable mine fire detection, NIOSH has evaluated multiple sensors for early mine fire detection and nuisance signal discrimination.
• The Use of Light Scattering and Ion Chamber Responses for the Detection of Fires in Diesel Contaminated Atmospheres
  6/1/2002 - Peer reviewed journal articles
  Experiments were conducted to determine the optical scattering properties of diesel particulate matter (DPM) and various combustion aerosols from both flaming and smoldering combustion sources at discrete angles of 151 and 301 in the forward direction...
• In Mine Evaluation of Discriminating Mine Fire Sensors
  6/1/2002 - Conference papers
  An evaluation of multiple mine fire sensor types for nuisance alarm discrimination. The response of multiple fire sensor types to three small coal fires and three small conveyor belt fires in the presence of diesel emissions was evaluated.